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Home My WebLink About1.0 ApplicationRECEIVED MAY 1 2 200 8 GAR FIELD COU NTY y B ·11· & Pl · D G~I ELDCOUNT Lii c mg a11111 ng epa rtr B'O'ILDING& PLANN ING 'I 08 81h Street , Suite 401 G lenwood Sp ri ngs, Co lomdo 8'160 ·1 Telepllone: 970.945 .8212 Facs imile: 9 70 .38 4.34 70 www .garfield-countv .com Floodplain Development Permit GENERAL INFORMAT ION ) Ge nem l Loca ti on of tile Prope rty: 2.5 miles north of north end of CR 211 or about 19.S mile.<; north/northwest of De Beque , CO (39 °34' 17 .94"N latin1de, 108°20'43 .51 "W longitude NAD 83 I WGS-84) ) Ex isti ng Use & Size of Prope rty in acres:Grazing I Agricultural 12 of ::::54,000 contiguous acres ) Descripti on of Pr oposed Pr ojec t: Central Production Facility for natural ga s productions at Chevron North American Exploration and Production Company's Pice.ance Basin Natural Gas Development Program north of De Beque, Colorado )..-Zo ne Ois tri ct(s): Resource Land<> ) Na me of Ow ner of the Prope rty: ----------------~-- Chevron U.S .A. Inc. ) Aclcl ress : do Chevron Texaco Property Tax, P.O. Box 2 85 T elepll one: _______ _ ? Cit y: Hou sto n Sta te: TX Zi p Code : 77001 FA X: ____ _ ) Name of Ow ner's Represen tati ve , if mw (Attorne y, Pl n nner. etc): Sally Cuffin, URS -Washington Division };;> Add ress : 7800 E. Union Avenue, Suite 100 Telep hone: (303) 843-2219 } Cit y : Denver State: CO ~~------- Zi p Code : 8023 7 FA X: (303) 843-3622 STAFF USE ONLY } Doc. No .: Fl P"tCJO 1 Date Subm itted : TC Date: ------- ) Pl nnne r: Hearin g Date: __________ _ ) ) URS Chevron !\!I Wash ington Divi sion GARFIELD COUNTY FLOODPLAIN DEVELOPMENT PERMIT APPLICATION CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM CENTRAL PRODUCTION FACILITY AREA A Is sued for County Submittal SMC 05/08/08 REV. DESCRIPTION BY CHKD APVD EM DATE RVWD REVISIONS CLIENT: Chevron North Ame ri ca Exploration and Production Company PROJ ECT: Piceance Basin Natural Ga s D e ve lopment Program -Earl y Production S yste m JOB NO.: 29454 -Under Che vron Contract N umb er C53721 l DOC.NO.: PBSR-59836A VF-RGL-PMT-URS-00000-00003-00 ) a) have the lowest floor (including basement) elevated above the highest adjacent grade at least as high as the depth number specified In feet on the community's FIRM (at least two feet if no depth number is specified), or; b) together with attendant utility and sanitary facilities be designed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads of effects of buoyancy. 3. A registered professional engi neer or architect shall submit a certification to the Floodplain Administrator that the standards of this Section, as proposed in 6.08 .02 (1) a., are satisfied . 4 . Require within Zones AH or AO adequate drainage paths around structures on slopes , to guide flood waters around and away from proposed structures. I have read the statements above and have provided the required attached informati_on which Is correct a d accurate to the best of my knowledge. sic e Last Revised: 11/2007 --:-.. ~ ) I. APPLICATION SUBMIITAL REQUIREMENTS Any use to be developed in the fl oodplain shall be required to obta in a Development Permit , in accordance with the app li cab le regu lat ions of Section 6.08.02. All applicatio ns for a Floodplain De velopment Permit und er thi s Regulation shall be reviewed by the Floodplain Administrator. As a minimum , spe cifi ca lly re spond to all th e following item s below and attach any additional information to be submitted with thi s application: I . Please s ubmit , in narra tive fo rm , the natur e and c hara cter of th e prop ose d use in the fl oodplain. Submit plans an d supportin g in fo rmation (i.e. lett ers from respons ible age ncies). 2. Submit a site plan /map drawn to sca le that portrays th e boundaries of th e subject property, all existing and proposed st ru cture s on the property and th e boundaries of th e flood -frin ge and fl ood way of th e I 00-yea r flood plain . 3. Submit a vici ni ty map show in g s lope I topogra phy of your property, for which a U.S.G .S. I :24 ,000 sc ale quadrangle map will suffi ce . 4. Submit a co py of the deed and a lega l desc ripti on of th e subject properly . 5. If yo u are ac tin g as an agent fo r th e proper ty ow ner, you mu st att ach an ac knowledgement from the prop ert y owner that yo u may act in hi s/her behalf. 6. A $400.00 Ba se Fee: App li cant shall s ign th e "Agree ment for Payment " for m and provide the fee w ith the appl ica tion . 7. Submit 2 cop ies of thi s co mpl eted appli ca ti on for m and all th e requir ed s ubmitt al materi als to the Building and Planning Department. Staff will requ es t additional copies o nce the app li cati on ha s been deemed tec hni ca ll y co mplet e. 8. All app li cati ons for a F loo dpl ai n De ve lo pm ent Permit und er thi s Regul atio n shall be rev iewed by th e Fl oodplain Ad min is trat or and sha ll be processed according to th e fo ll ow in g process and stand ards: 6.08.02 Permit Proced ur es (I ) Appli cati on for a Deve lopmen t Permit shall be pre sented to th e Floodp lain Admini strator on fo rms furni s hed by him/h er and ma y in c lud e, but not be limited to, plan s in duplic ate drawn to sca le show in g th e locat ion, dimens ion s, and elevation of proposed land sc ape alterat ions, ex istin g and propo sed stru ctures, includin g th e pl acement of man ufa ctured homes, and th e locatio n of the foregoing in re lat ion to areas of spec ial fl ood haza rd . Additionally , th e foll o wing inform ati on is required: a. E leva ti on (in re lation to mean sea leve l), of the lowest fl oor (incl udin g ba sem ent ) of all ne w and substantiall y impro ved structures; b. Elevati on in relati o n to mean sea level to whi ch any nonres id enti al s truc ture shall be flood -proofed; c. A ce rtificate from a regi stered profess io nal engineer or archit ect th at th e nonre si dential fl oo d-proofed stru ctur e s hall meet th e fl ood-proofin g criteria of Sec ti on 6.09 .; d. Desc ription of the ex tent to whi ch any wate rco ur se or natural drain age will be a ltered or re locate d as a result of proposed deve lop ment. e. Maint ain a record of all such in for mati on in accord ance wi th Sectio n 6.08.0 I (3). (2) Appro va l or de ni al of a Deve lopm ent Permit by th e Fl oo dplain Admini strat or shall be based on all of th e provi s ions of thi s reso luti on and the fo ll ow in g releva nt fac tors: a. The d anger to life and property due to fl ood in g or ero s ion damage; b. The s usce ptibility of the proposed fac ilit y a nd it s co nte nts to fl ood damage and th e effect of s uch dama ge on the indi vidu al owner; c. The d anger that mat erial s may be s wept ont o other land s to the injur y of oth ers; d. The compa tibilit y of th e propo sed use with ex istin g and anti cip ated deve lop ment ; e . Th e s afet y of access to the property in time s of fl ood fo r ordinary and emerge ncy ve hic les; f. The costs of providing gove rnm en tal se rvices dur ing and after fl ood conditions in cludi ng mainten a nce and repair of streets and bridge s, and public utiliti es and fa ciliti es such as sewe r, gas, electrica l and water systems ; g. The ex pec ted hei ght s, ve loc it y, durat io n, ra te o f ri se and sed iment tra ns port of the fl ood waters and th e effec ts of wave action, if appli cable, ex pected at th e s it e; h. The necess it y to the facility of a wate rfront locati o n, where appli cable; i. The ava ilability of alternative loca ti o ns, not su bj ec t to fl oo ding or erosion dama ge, fo r the proposed use; j . The relationship of the pro posed use to th e co mp re hens ive pl an fo r th at area. (3) Outlin e of Pro ces s. The Administrative Revi ew process shall co ns ist of the fo ll ow in g procedures : a. Review Process I. Application. Th e app li ca ti on materia ls required fo r a Develo pment Permit su bject to Admi ni strative Review are set fo rth in Section 6.08.0 1 (2). 2. Determination of Co mpl eteness. The Director shall rev iew the app li cation for dete rmin at ion of co mpl ete ne ss . 3. Eva luation by Director/Staff Rev iew. Upo n determination of co mpletene ss, the Di rector shall review the applicatio n for co mplian ce with the approva l standards set for th in thi s resolut ion. The Director's eva lu ati on of the application ma y in clud e co mm ent by referra l agencies. b. Dire ctor Decisio n. Within thirty (30) work in g day s of the date of determination of comp leteness, or close o f th e co mme nt period if th e app li cati on is referr ed fo r comme nt , the Dire ctor may app rove, approve wi th co nditi ons or deny the land use chan ge ap pli cation subj ec t to Administrative Re view. The Director 's decision shall be based upon co mplian ce of the propo sed use with the approva l stand ard s set forth in thi s reso luti on. I. Approval of Application. If the app licati on sa ti sfie s all of the applicable standa rd s , th e application shall be approved. The ap pli cati on may be approved with cond itio ns determ ined necessary for co mpli ance with applicable stand ard s. 2. Den ial of Application. I f th e app li cati o n fa il s to sa ti sfy all of the app li cable standards, the app li cat ion shall be denied. c. Written Notice u f Decis ion. The Dire ctor shall in for m the app li ca nt of the approva l, co nditions of approval or basis for denial in wri tin g withi n five (5) wo rki ng days of the date of decision. Not ice of the Director's decision may also be provided to th e Board of County Co mmi ssio ners. d. Reco nsi dera ti on of Direc tor's Deci s ion I. Reg ues t by App li cant fo r Recons ideration of Dec is ion. An app li ca nt may reques t reco nsidera tion of the Director's dec ision by the Board of Co unty Co mmi ss ioners. The aggrieved pa rty ma y file a writte n requ est within ten (I 0) calendar days of th e da te of writte n no tice of the decision by th e Direc tor. 2. Sc hed ul e Public Hearing. Publi c hea rin g by th e Board of County Com miss ioners shall be he ld wi th in forty-five (45) ca le nd ar days of th e dat e of receipt of th e request fo r recons iderat ion. 3. Notice by Publication. At leas t thirt y (30) ca lend ar da ys prior to th e date of th e sc heduled public hear in g before the Board of Cou nt y Co mmi ss ioners, the aggrieved party shall have publi shed a notice of public hearin g in a newspaper of ge nera l c ir cul ati o n in the area that the propo se d lan d use change is loca ted . 4. Decision by Board. The Board shall co ndu ct a hea ring. The Board shall uph old th e Director's deci sion, modify th e de c ision or revers e th e decision , based up o n co mpliance of th e proposed Development Per mit wit h the approva l stand ards set fort h in Sections 9.08.02 (I) and 9.0 9. Genera l Standards for Cons tru ction In all areas of spec ial fl ood hazard s th e fo ll owing provisions are required fo r all new constructio n and substantial im proveme nt s: I . A ll new construction or substan ti a l im prove ments shall be des igned (or mod ified) and adequa tely anchored to prevent fl otat ion, co ll apse or latera l move me nt of th e stru ctu re res ultin g from hydrod y namic and hydrostat ic loads, including th e effects of buoya ncy; 2. All new co nst ru ct ion or sub stantia l im prove ments shall be constru cted by met hods and prac ti ces that minimi ze fl ood da mage; ) 3. All new co nstruction or s ub stantial improve ment s shall be constructed with materi als res ist ant to fl oo d d ama ge; 4. All new co ns tru cti on or sub stanti al impro ve ment s shall be co nstru cted with e lec tri cal, hea tin g, ventilation , plumbing , and air co nditionin g equipment and other service faci lities th at are de signed and/or located so as to prevent water from entering or accumulating within th e co mponents during co nditi ons of fl oo din g. 5. All new a nd re placement water suppl y system s shall be designed to minimi ze or eliminate infiltrati on o f fl oo d waters int o th e sys tem; 6. New and re plac e ment sa nitary sewage systems shall be desig ned to minimi ze or e limin ate infiltration of flood water s int o the syste m and di scharge from the sys tems into flood waters; and , 7. On -s it e wa ste dispo sal sys tems s hall be located to avoid imp airm ent to the m o r co nt amin ati on from th em durin g fl ooding. 8. Wh en a regulator y fl oo dway ha s not been des ignated , th e Floodplain Admini strator mu st require that no new co nstru ction, sub stanti al improvement s , or other de ve lop ment (includin g fill) shall be permitted within Zo ne s A l -30 and AE on the community's FIRM , unle ss it is demon strat ed that the cumul at ive effect of th e proposed development , when combined with all other ex isting and a nti cipated deve lopment , will not increase the water s urface eleva tio n of th e base fl ood more than one foot at a ny point within th e com munit y; and , 9. Under th e pro visions of 44 CFR Chap ter 1, Section 65.12, of th e Na ti onal Floo d In suran ce Pro gram re gul ati ons, a co mmunity may a ppro ve cert ain de velopm ent in Zo nes A 1-30, AE , AH , on the co mmunit y's FIRM whi ch in crease s th e water surfa ce elevation of the base flood by more than one foot, provided th at the comm unit y first applie s fo r a co nditi onal FIRM revi sion throu gh FEMA (Co nditi ona l Letter of Map Re vis ion). 6.09 .02 Specific Standard s In all area s of specia l fl ood hazard s where base fl oo d elevat ion data has bee n provided as se t forth in Sec tion 6.03 , or 6.09.03, th e foll owing provi s ion s are required: I . Re s identi al Co nstructi on -new con structi o n an d s ub stanti al impro ve ment o f any res id enti al structur e shall ha ve the lowest fl oo r (includin g base ment), elevated to one ( 1) foot abo ve th e ba se fl ood eleva ti o n. A regi stered profess ional eng ineer, arc hit ect, or land sur veyor shall submit a certifi ca tion to th e Fl oo dplain Administrat or that th e stand ard of thi s s ub se cti on as prop ose d in , Sec ti on 6.08 .02 (I), is sa ti sfi ed. 2. Nonres id entia l Con stru cti on -new constructi on and substantial imp rove ment s of any co mm e rc ial, indu strial or other nonreside nti al structu re shall eith er hav e the lowes t fl oo r (inc lud in g ba se me nt) e levated to or above th e ba se flo od leve l or togeth er with att end ant utilit y and sanitary faci lit ies, be des igned so th at be low th e base fl oo d leve l th e stru cture is watertight with wa ll s sub stanti all y imp erm eab le to th e passage of water and with stru ctura l co mp onent s hav in g th e ca pability of re s istin g hydro stati c and hydro dynamic loads and effec ts of buoyancy. A reg istere d professiona l e ngin ee r or archit ec t shall deve lop and/or rev iew stru ctural des ign, spec ifi ca ti ons, and pl ans for the co nstru cti on, a nd s hall ce rtify th at th e des ig n and meth ods of co nstru cti on are in acco rda nce with acce pted stand ard s of pra cti ce as ou tlin ed in this subsecti on. A record of such certifi ca tion whi ch includ es th e spec ifi c eleva ti on (in re lation to mean sea leve l) to whi ch such struc tures are fl oo dp roofed shall be maintain ed by the Floodp lain Adm ini strator. 3. En clos ures -new co nstruc tion and s ubs tantia l imp rove ment s, with fu ll y e ncl osed areas below th e lowes t fl oo r th at are usa ble so lely for parkin g of ve hicl es, building access o r sto ra ge in an area ot her than a base ment and whi c h are subj ect to flo od in g shall be des ig ned to aut o matica ll y equali ze hydro static fl oo d fo rces on ex terior wa ll s by all ow in g fo r the entr y and ex it of fl oodwa ters. Des igns fo r meeting thi s requirement mu st either be certifi ed by a re gis tered professio nal engi nee r or archit ec t or mee t or exceed th e fo ll ow in g minimum criteria: a) A minimum of two opening s having a tota l net area of not less th an o ne s quare inch for every s quare foot of e nclo sed area subj ect to fl oodi ng shall be provid ed. b) The bott om of all openin gs shall be no hi gher th an one foot above gra de . c) Ope nin gs may be equipped with scree ns, louve rs, va lves, or oth er coverin gs or dev ices provided th at they per mit the aut omati c en try and ex it of fl oodwa ters. 4. Manufact ured Hom es a) Require th at all manufac tur ed homes to be pla ced withi n Zo ne A on a co mmunity 's FHBM or FIRM shall be in stall ed us ing meth ods and practi ces whi ch minimi ze flo od damage. For th e purposes of th is requirement manufa ctured hom es mu st he eleva ted and anchored to re sist flot ati on, co ll apse, or latera l move ment. Meth ods of anchoring may include, but are not lim ited to, use of over-th e-top or fr ame tie s to ground ancho rs. Thi s requirement is in additi on to app licabl e State and loca l anchori ng req uireme nt s for resis ting wind force s. b) Require th at man ufact ured homes th at are placed or substantially improved wit hin Zo nes A 1-30, AH , and AE on the co mmunity's FIRM on si tes (i) outs id e of a manufa ctured ho me park or subdi v ision , (ii ) in a new manu fac tur ed home pa rk or s ubdi vis ion, (ii i) in an ex pansio n to an ex istin g manu fac tur ed home park or subdivi s ion, or (iv ) in an ex istin g manufactured home park or s ubdi vis io n o n whi ch a manufactured home ha s in c urred "s ubstantial dam age" as a result of a fl oo d, be elevated on a permanent fo und ati on suc h th at the lowes t fl oor of the manufactured hom e is eleva ted to or above the base fl ood eleva tion and be sec urely anc ho red to an adeq uately a nchored foundation sys tem to re sis t fl otat ion, co ll aps e , a nd lateral movement. c) Require th at manu factured home s be placed or substantia ll y impro ved on s ites in a n existing manufactured home park or subdivisi on with Zones Al-30, AH and AE on the community's FIRM that are not subjec t to the provisions of paragraph (4) of this sect io n be elevated so th at either: I ) th e lowest flo or of th e manufa ctured home is at or above th e base flo od elevat ion, or 2) th e manufact ured home chass is is s upp orted by rein forced piers or oth er foundation e le me nt s of at leas t equi va lent strength th at are no less than 36 inches in hei ght above grade an d be securel y a nchore d to an adequately anchored fo undation sys tem to resist flotat ion, co ll apse, a nd latera l move me nt. 5. Re crea ti onal Vehicle s -Requ ire th at rec reation al ve hicle s placed on si tes withi n Zo nes A l -30, AH , and AE o n the co mmunit y's FIRM ei th er: a) be on th e si te fo r fewe r th an 180 co nsec utive day s, b) be fully li ce nse d and ready for hi ghway use, or c) mee t th e permit re quire ment s of Arti cle 4 , Secti o n C (1), and th e elev ation and a nch oring require ment s fo r "manufa ctured homes " in paragraph (4) of thi s sec ti on. A rec reational ve hicl e is ready fo r hi ghw ay use if it is on its wheel s or jack ing sys tem, is att ac hed to the s it e only by qui ck di sconnect typ e utilitie s and sec urity devices, and has no permanent ly attached addit io ns. 6 .09 .03 Standards For Subdi vision Prop os al s I. All subd ivision proposals in clu din g the place ment of ma nufac tured home par ks and subdi v is io ns shall be co nsistent wit h Articl e I , Secti ons B, C, and D of th is resol uti on . 2. All proposa ls fo r th e deve lopm ent o f s ubdi visions in cluding the place ment of ma nu fact ured ho me park s and s ubdi visions sha ll meet Deve lopme nt Pe rmit requirement s of 6 .08 .02 and th e prov is io ns of 6.09 of thi s re so luti on. 3. Base fl oo d e leva ti on data shall be generated fo r subdi vis ion proposa ls and o th er propo sed developm ent in cl udin g the pl ace ment of manu fac tured home park s and s ubdi vis io ns whi ch is grea ter th an 50 lots or 5 ac res, whi chever is lesser, if not oth er wise prov id ed pursuant to Arti cle 3, Sec ti on B or Articl e 4 , Sec tion B (8) of thi s re so luti o n. 4 . All subdi vision propo sal s in cludin g th e pl ace ment of manufa ctur ed home park s and s ubdi vis ion s sha ll have ad equ ate dra inage prov id ed to redu ce ex pos ure to fl ood haza rd s. 5. All subdi vis ion prop osa ls in cl udin g the pl ace me nt of manu fac tured home parks and subdi visions shall have pu bli c util iti es and fac ilities such as sewer, gas, elec trica l an d wa ter sys te ms located and co nstru cted to minimi ze or e li min ate fl oo d da mage . 6.0 9.04 Fl ood way Floodways -loc ated within areas o f specia l fl oo d haza rd establi s hed in Sectio n 6.03.02, are areas des ignated as fl oo dways. S in ce th e flo odway is an extre mely haza rdou s area du e to the ve loc it y of fl ood wa ters whi ch ca rry debris, po tenti al proj ec til es and ero sion po tential , the fo ll ow in g pro visio ns shall app ly: I . Encroa chm ent s are pro hibited , includin g fill , new con stru cti on, sub stanti al improvem ent s and o th er de ve lopme nt wi thin th e adopted reg ulato ry fl oo dway unl ess it ha s been demo nstrated thro ugh hydro logic and hydra uli c a nalyses perfo rmed in acco rd ance with stand ard eng in eerin g pra cti ce th at th e pro pose d encroachm ent wo uld not res ult in a ny in crease in fl oo d leve ls with in th e co mmunit y durin g th e occ urrence of th e base fl oo d di sc harge. 2. If Sec ti on 6.09.02 (I) a bove is sa ti sfi ed, all new co nstru cti on and sub stanti al im pro vement s shall co mpl y with all appli cabl e fl oo d hazard redu cti o n prov is ions o f Arti cle 5. 3. Under th e prov isions of 44 CFR Chap te r 1, Sec ti o n 65.12, of th e Nati ona l Floo d In s urance Reg ul atio ns, a co mmunit y may permit e ncroac hm ent s within th e adopted regul atory fl oo dway th at wo uld res ult in an in crease in base fl oo d eleva ti ons, prov id ed th at the co mmunit y fir s t appli es for a co nditional FIRM a nd fl oo d way rev is ion thro ugh FE MA. 6.09.05 Stand ard s For Areas Of Shall ow Fl oo din g Located within th e areas of spec ia l floo d haza rd es tab li shed in 6.03 .02 are areas des ignated as sha ll ow fl oodin g. These areas have spec ial flo od hazards associa ted with ba se fl oo d dep th s of 1 to 3 fee t whe re a clearl y defi ned chann el <lut:s nut exist a nd where th e pat h of fl oo din g is un predic tab le and where vel oc ity fl ow may be ev id ent. Such fl oo ding is cha rac teri zed by pondin g or sheet fl ow; th erefo re, th e fo llowin g prov is ions apply: I. All new co nst ru ction and sub stanti al imp rove ment s of res ide nti a l st ru ctu res have th e lowest fl oor (in cludin g base ment ) elevated above th e hi ghes t adj ace nt gra de at least as hi gh as th e depth numb er specified in feet on th e co mmunit y's FIRM (a t leas t two feet if no depth num ber is speci fi ed). 2. All ne w co nstru cti o n and substan ti al imp rove ment s of non-res ide nti al stru ctures; a) have the lowest fl oor (in cl udi ng base ment) e leva ted above th e hi ghes t adj ace nt grade at leas t as hig h as th e depth nu mber speci fi ed in fee t on th e co mmunit y's FIRM (a t least two fee t if no de pth numb er is spec ifi ed), or; b) toge th er with attenda nt utilit y and sa nitary fac iliti es be des igned so th at be low th e bas e fl ood leve l th e st ru ctu re is watertight with wa ll s s ubs tanti all y imp erm eab le to the passage of wa ter an d with stru ctu ra l co mpo nent s hav in g th e capab ility of res isting hydros tatic a nd hydrodynami c loa ds of effects of buoya ncy. 3. A reg istered profess ional eng in eer or archit ec t sha ll sub mit a certifi ca ti on to th e Flood p la in Ad min is tra tor th at th e stand ards of thi s Sectio n, as proposed in 6.08.02 (I ) a., are sa ti sfi ed . 4. Re quir e within Zo nes AH or AO adequ ate dra in age path s aro und structur es o n slopes, to gui de fl ood wa ters aro un d and away fr om proposed st ru ctur es. I have read the s tatements above and h ave provided th e required attached information which is correct and accurate to the bes t of my kn o wl ed ge. (Signature of Property Owne r) Las t Rev ised : 11/2007 Street Address I Genera l Lo cation of Property: Sections 27, Township 6 South, Range 98 West, 61h Principal Meridian Legal Description: A parcel of land situate in Tracts 103 and 104 located in the NW1A of Section 36, Township 5 South, Range 98 West of the 6th Principal Meridian, County of Garfield, State of Colorado, the perime ter being more particularly described for area as follows: Commencing at a found stone in place for th e W 1A comer of said Section 36, whence a found 1924 General Land Office brass cap in place for the northwest corner of said Section 36 bears N00°04'39"W a distance of 2643.38 feet, with all bearings contained herein being re lative thereto; thence N34°3 l '33"W a distance of 829.75 feet to the true point of beginning of the parcel de sc ribed herein; thence N56°05' 43 "E a distance of 689.00 feet; thence S33°54 ' l 7"E a distance of 480.00 feet; thence S56°05' 43"W a distance of 689.00 fee; thence N33 °5 4' l 7"W a distance of 480.00 feet to the point of b eg inning , containing 7.09 acres more or less (about 5.9 acres to be disturbed). Existin g U se & Size of Property in acres: The footprint of the Central Production Facility area is about 3 .3 acres with an additional 1.6 acres to be used for temporary storage and a relocated access road. It is located in Tracts 103 and 104 of a 4311 .69 acre parcel (No. 213732100008), which is cutTently zoned as grazing I agricultural land (Ref: Garfield County Account Number -R290520; Parcel Number - 213732100008). This parcel is part of a larger contiguous parcel of about 55,000 acres. Zone District: Resource Lands Name of Property Owner (App li cant): Chevron U.S.A. Inc. Atten: Ken Jackson 11111 South Wilcrest Drive Houston, TX 77099 Phone (281) 561-4991 FAX (281) 561-3702 Name of Owner's Representative, if any (Attorney, P lanner, etc.) Sally Cuffin, URS -Washington Division, Denver, Colorado ) Garfield County Floodplain Development Permit Application Central Production Facility Area Chevron Piceance Basin Natural Gas Development Program Chevron North America Exploration and Production Company 760 Horizon Drive Grand Junction, CO 81506 Revision A Prepared by URS • Washington Division 7800 East Union Avenue Suite 100 Denver, Colorado 80237 Table of Contents 1 Nature and Character of Floodplain Development ............................................................ 1 2 Site Plan I Property Map ...................................................................................................... 2 3 Topographic Vicinity Map ................................................................................................... 2 4 Property Deed ........................................................................................................................ 2 5 Authorization Letter ............................................................................................................. 2 6 Floodplain Study I Relevant Floodplain Zoning Regulations ........................................... 2 6.1 Building I Equipment Elevations [§6.08.02 a., b., & c.] ................................................ 3 6.2 Drainage Alteration Description [§6.08.02 d.] ............................................................... 3 6.3 Information Record [§6.08.02 e. -§6.08.01) .................................................................. 4 6.4 Relevant Factors [§6.08.02 (2)] ...................................................................................... 4 6.5 General Standards for Construction ............................................................................... 5 6.6 Specific Standards [§6.09.02) ......................................................................................... 5 6.7 Floodway [§6.09.04] ...................................................................................................... 5 6.8 Standards for Areas of Shallow Flooding [§6.09.05] ..................................................... 5 Layout I Process Drawings Grading Drawings Erosion Control Drawings Maps Deed Letter of Authorization Floodplain Study Floodplain Drawings Relevant Documents Attachments DOC No: PBSR-59836AVF-RGL-PMT-URS-00000-00003-00, Rev. A Chevron North Anlerican Exploration and Production Company i CPF -Floodplain Development Permit Piceance Basin Natural Gas Development Program ) Introduction As part of their Piceance Basin Natural Gas Development Program (Progra m), Chev ron Nort h America Exploration and Production Company (C hevron) plans to co nstruct a Central Production Facility (CPF) along Tom Creek, a tributary of Clear Creek (tributary of Roan Creek) (see Figure I and 2 in Map s). A review of area record s indicated that there was no published Federal Emergency Management Agency (FEMA) for this remote area of Garfield Co unt y. Be ca use of the narrow canyo ns and "flashy " st rea ms associated with the Program s it e, the need for a detail ed floodplain analy s is was id entified early in th e proj ect. A preliminary floodplain analysis was performed for Clea r Creek (second-ord er tributary) with su bse qu ent anal yses of the first-order tributaries in cludin g Tom Creek. The following developmen t plan addresses th e Tom Creek floodplain miti gat ion measures ass ociated with th e pl aceme nt of th e Central Produ ct ion Facility (CPF). 1 Nature and Character of Floodplain Development Please submit , in narra ti ve fo rm , th e natur e and charac ter of the propose d use in the fl oo dpl ain . Submit pl ans and supp ortin g inform ati on (i.e . letter s fr om res pon sib le age ncies). Chevro n's CPF is used to dry and compress natural gas prior to its introduction into the sa les pipeline, an essenti al pro cess for the development of th e Chevron's Skinner Ridge natura l gas field. The faci lity has been proposed for pl ace ment along Tom Creek (near th e confluence of Tom Creek and Clea r Creek), a lo cati on th at was the result of an exte nsive site se lec ti on process. The primary driver for thi s lo ca tion wa s its cen tral location and proximity to the fir st four production we ll pads. The placement of add iti onal propo se d facilities a lso factored into the s it e se lection. The CPF pad will house a vari ety of equ ipment (compressors, generators, separators, tanks, etc.) and buildin gs (compressor, co ntrol, electri ca l, warehouse, etc .) required to dry and compress natural gas prior to tran sfer into th e sa les pipelin e. A secondary pad will be installed to support genera l cons tru cti on activities until th e CPF comes on line. Detailed informati on about th e equi pme nt I building type s wa s provided in the CPF Special Use Permit application that wa s con ditionally approved on March 10, 2008. One of the co ndition s of approva l was the submittal of a Floodplain Development Permit (see Re leya nt Document s att ac hm ent). Drawing 2033-240-20-AP-0002-0 I , Rev. 1 F, (see Layout I Process Con trol Drawings) shows th e CPF layout and equipm en t types that need to be protected from a I 00-year flood eve nt. The CPF pad will house a variety of equ ipm ent and buildings required to dry and compress na tural gas prior to tran sfer into th e sa les pip elin e. Detail ed in format ion about th e equipment I building types was provided in CPF specia l use permit app li ca tion th at was condition all y ap pro ved on March I 0, 2008 (s ubmitt al of the F lo odp lain Development Permit app lic at ion wa s one of the condit ion s). The late st version of th e Layout I Process Co ntrol Drawin g, Grading Drawings, an d Erosio n Control Drawings are provided as attac hm ents to provide supp le ment al inform ati on from the Spec ial Use Permit app li cation. Rather than placing these facilities direct ly in th e floodpl ain and using building co nstru ction miti ga tion mea sures, th e propo se d sit e grading inv olv es ra isin g the pad , cons tru ct in g a protectiv e berm I levee, and replacem ent of an ex isting, unders ized cul ve rt. After th e in corpora tion of these DOC No : PB SR-598 36A VF-RGL-PMT-URS·00000·0000 3-00. Rev. A Chevron North American Exploration and Produ c1ion Compa ny CPF -Floodp lai n Deve lopme nt Perrnil Piceance Basin Natura l Ga s Developm ent Prog ram chan ges, th e lo west point of th e propose d grad in g w ill be at lea st 1.75 feet abov e the 100-year flo od event. Detail s of the flo odp la in ana lys is and resultin g des ign are prov id ed in Sec tion 6. 2 Site Plan I Property Map Submit a site plan /map drawn to sca le th at portrays the bound ari es of th e s ubj ec t properly, all exist in g and propo sed stru ctu res on the prop erty and th e bounda ri es o f the flood-frin ge and fl oo d way of th e I 00-year flo odplain. A s ite pl an of the CPF area is provided as Drawing 2033-240-20-AP-0002-0 I , Rev . IF (see Drawings). An overlay of thi s co nfi gurati on on th e proposed gra ding is provided as Drawing PBSR-59836AVF-CIV-LAY-URS-00000-00002-00 , Rev. 0. Detailed information about th e flood plain ex ten d is pro vided on Drawings PBSR-59836A VF-CIV-URS-0000-00001-0 I and PBSR-59836AVF-CIV-URS-OOOO-OOOOJ-02, wh ic h are su ppl emen ta l drawin gs to the Floodp lai n Study (see Floodplain Drawin gs). Th e CP F is lo ca ted on a Chevron ow ned co nti guous 54,000 acre parcel nort h of De Bequ e, Co lorado. A se ries of County Assesso r Map s ha s been provided that shows all of th e prope rty boundaries (see Map s). 3 Topographic Vicinity Map Submit a vic init y map showing s lope I to pography o f yo ur propert y, fo r which a U.S.G.S. 1 :24,000 scale quadrangle map will suffi ce. Area topogra phi c in th e Pro gra m vicinity ca n be seen in Figure 2 (see Maps). T opogra phy in the CPF area is shown on Dra wings PBSR-5983 6AVF-C IV -URS-OOOO-OOOOl-01, PBSR - 59836A VF-CIV-URS-0000 -00001 -02 and PBSR -5983 6A VF-C IV -LA Y-URS-00000 -0 000 2-00, Rev . 0 and th e Floodplain Study fig ures (see Gra din g and Floodpl ain Draw in gs). 4 Property Deed Subm it a copy of the deed and a lega l descr ipti on of th e subj ect property. Portion s of th e deed ass oc iated with the CPF tracts are provided as th e Deed atta chm ent. Additional ow nership inform at ion has bee n provided as a land ownership dec larati on. 5 Authorization Letter If yo u are act in g as an age nt for the prope rt y ow ne r, you mu st att ach an acknow ledgement from th e propert y owner th at you may ac t in his/h e r behalf. A Jett er authori zin g URS -Was hington Gro up to represent Chevron in the permitting ac ti viti es is provided in the Authori zation Le tter attac hment. 6 Floodplain Study I Relevant Floodplain Zoning Regulations Pre limin ary s it e e valuations id entified th e nee d to assess the Tom Creek floodp lain in th e vici nity of th e Chevron proposed Central Prnduction Facility Tom Creek js a fir st-orde r str eam u sj o ~ the DOC No: PB SR-59836AVF-RGL-PMT-URS -00000-0000 3-00. Rev. A Chevro n Nort h Am erican Expl ora tio n and Productio n Company 2 CPF · Floo dplain Deve lop ment Pe rm it Pice ance Bas in Nat ura l Gas Developm ent Pro gram ) Strahler stream order system (Clear Creek-second order; Roan Creek-third order; Colorado River -fourth order). The proposed CPF location is in the SWY-1 NWY-1 of Section 36, Township 5 South, Range 98 West of the 6th Principal Meridian (see Maps -Figure 2). Tom Creek is a typical area "flashy" stream, which means that precipitation events often generate significant flow increases followed by a rapid return to pre-precipitation flows. An early floodplain analysis of Tom Creek used LID AR and USGS digital elevation model data indicated the JOO-year floodplain would affect the majority of the CPF site. This information produced an initial floodplain topographic surface that was analyzed using ArcGIS (ESRI) and HEC RAS [U.S. Army Corps of Engineers, Hydrologic Engineering Center (HEC), River Analysis System (RAS)] software. Volumetric flow rates needed for the hydrologic model were generated using information from a regional specific USGS Water Resources Investigations Report [Analysis of the Magnitude and Frequency of Floods in Colorado, USGS Water Resources Investigations Report 99-4190]. Using the analytical results as a basis for design, the preliminary civil design work identified that a significant amount of fill (50,000+ cubic yards) would be required to raise the site out of the floodplain. The need for supplemental field data was identified because of the large fill requirements and known resolution limitations of the LID AR and USGS data. The initial model also identified that the existing culvert under the north I south access road (referred to as Clear Creek road) had insufficient capacity for the JOO-year flooding event. The lack of capacity caused pooling on the eastern side of the road grade and a subsequent overlapping that would sheet flow toward the Torn Creek and Clear Creek confluence. Subsequent in field surveys generated cross sections with significantly better resolution than the remotely sensed I USGS data. These cross sections were used to generate a refined data set that provided better definition of the stream channel and surrounding topography. The new topographic data was then input into the HEC RAS model, generating a revised floodplain (see Floodplain Study). The Floodplain Study includes representative cross sections of the original and modified site conditions. Drawing PBSR-59836AVF-CIV-RPT-URS-OOOOO-OOOOl-02 illustrates the initial floodplain (using the refined data set). Drawing PBSR-59836AVF-CIV- RPT-URS-OOOOO-OOOOl-OI shows the site modifications used for mitigation. The following addresses specific floodplain zoning regulations that are applicable to this site. 6.1 Building I Equipment Elevations [§6.08.02 a., b., & c.] The lowest point of the proposed CPF pad will be 6012 feet, which is I. 75 feet above the calculated floodplain in that vicinity. The closest buildings to that edge of the pad include Control and Warehouse Buildings and a Restroom, Lockers, Show Building (see Drawing 2033- 240-20-AP-0002-0I -Layout I Process Control Drawings). The pad elevation at these locations is at least 2.0 ft above the floodplain, with additional elevation differential provided by the building foundations (currently estimated to be a minimum of 2 ft). No site structure will be below the floodplain, which means that no structural flood-proofing will be required. 6.2 Drainage Alteration Description [§6.08.02 d.] The Tom Creek drainage channel along the CPF site will not be altered by the proposed grading. The grading will include the construction of a berm along the banks of the existing Tom Creek DOC No: PBSR-59836AVF-RGL-PMT-URS-00000-00003-00, Rev. A Chevron North American Exploration and Production Company 3 CPF -Floodplain Development Permit Piceance Basin Natural Gas Development Program drainage, but no material will be placed in the stream channel (see Drawing PBSR-59836AVF- CIV-RPT-LA Y-00000-00002-00, Rev. 0). However, there will be some modifications to the stream channel near the site of the culvert replacement. The new culvert will actually return the stream channel to its original capacity with the installation of a 5 ft x 12 ft box culvert. The access road in this area will be widened for improved traffic flow for future operations, which will require some adjustments of the downstream channel. The proposed grading plan also includes the addition of riprap in the stream channel to control erosion and velocities during major precipitation events (see Drawing PBSR-59836AVF-CIV-RPT-LA Y-00000-00002-00, Rev. 0). 6.3 Information Record [§6.08.02 e. -§6.08.01] A Special Use Permit for the CPF location was conditionally approved on March 10, 2008 special use permit application that was conditionally approved on March 10, 2008 (submittal of the Floodplain Development Permit application was one of the conditions). A Grading Permit application has been submitted to the County that reflects the findings of the floodplain analysis. The culvert replacement is currently being discussed with the local U.S. Army Corps of Engineers (USA CE) office to determine if this activity can be covered as a maintenance activity. The USACE determination is expected to be completed by the end of May 2008. The alteration of the waterway associated with the culvert replacement actually will improve portions of the stream channel resulting in erosion minimization and reduced sediment loading during all storm events. The off-channel berm I levee will result in slightly higher stream elevations during major precipitation events, but will dissipate prior to reaching the confluence with Clear Creek. 6.4 Relevant Factors [§6.08.02 (2)] Assuming the CPF grading is properly completed, there should be no danger to life or property during a 100-year flood event. The model indicates that the construction of the berm, coupled with the culvert replacement, should adequately protect the site and prevent any materials from being swept downstream (as a test case the HEC RAS model was rerun assuming a 500-year event, which again showed no property or erosion damage to the site). The remote location also is protective of downstream populations. Oil and gas operations are compatible with the Resource Land zoning regulations. The culvert replacement will ensure that the CPF site and nearby facilities can be accessed during a I 00-year flood event. No public utilities are present at this remote site, eliminating the need for government services. The Floodplain Study (see attachment) details the anticipated flood water heights and velocities. Duration and rate of rise will be dependent on the actual precipitation event and were not calculated as part of this analysis. Because of the "flashy" nature of these types of channels, the duration would typically be short with a very quick rate of rise. These deep-channel, flashy streams typically do not generate any significant wave action. Tom Creek would not be classified as a waterfront. DOC No: PBSR-59836AVF-RGL-PMT-URS-00000-00003-00, Rev. A Chevron North American Exploration and Production Company 4 CPF -Floodplain Development Permit Piceance Basin Natural Gas Development Program An extensive site selection process drove the placement of the CPF at this location. While alternative locations are available, the Chevron internal decision making process drove the selection of this site. There is no comprehensive plan available for this remote location. 6.5 General Standards for Construction All construction will occur above the 100-year floodplain. The water supply well for the site is proposed for installation near the confluence of Tom Creek and Clear Creek. The culvert replacement will maintain a 100-year event, eliminating any need to provide additional protection for the supply well installation. Onsite trash containers also will be protected from the event. Maintaining the I 00-year event within the parameters of the stream channel protects the proposed individual sewage disposal system from the floodwaters. It also protects the onsite condensate and produced water storage, which also has secondary containment protection. The remote location is outside the FIRM zones and eliminates any downstream increase in water surface elevation. 6.6 Specific Standards [§6.09.02] No residential construction will occur at this location. All nonresidential construction and enclosures will be completed above the calculated 100-year floodplain. No manufactured homes or recreational vehicles will be present at this site. 6.7 Floodway [§6.09.04] The attached Floodplain Study supports the construction of the protective berm and associated CPF grading within the floodway. The remote location ensures minimal downstream effects. 6.8 Standards for Areas of Shallow Flooding [§6.09.05] The culvert replacement eliminated the majority of the areas with shallow flooding. The grading plan places all construction above the floodplain. DOC No: PBSR-59836AVF-RGL-PMT-URS-00000-00003-00, Rev. 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' '" FOR Cl.JOO REVIEW 03/os/07 Explo'atlon & Prodx:tlon -MC8U PICEANCE f'IELD _ _DEVE~l?_PMENT-EPS 2. CASES B IN STREAM SUMIURI" TABLE ARE WI~ CONOnlONS. ----· ·--.-. . . ..... --' '" REVISED Af1ER HAZOP OS/14/07 llWG. SCAlf: NONE DRAWN BY: PAI (SSR) WELL PADS/CENTRAL FACILITY Dll19 05£14£07 [~Pi<UiECi ORIG. 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PIP/NC RCYISltwS SJL I fASJllC STAPl.CO TO POSTS SJLT F[lftt fASlllC IJICllOR£0 IN TA(.HOI 00 Al!ACHE.O fll!lill 10 POST ti".-fi'TllDtCH .. 1;11 rw Kt Gii fw llC TYPICAL SILT FENCE CONSTRUCTION HTS twU.tlHC STATUS ISSUCO REY DU[ SOE PEW 0 I & t 1101 Al'PROV(O fCll CBISlllUClll)I: lJC.£SS SI 0 1-'-''--'---t--+--+----t-t----tH---t-----------------------t--t-t----t I rno. Of:S~AOY ill PRINIS 8UAINC CARl IE• "' l • OIST.lHCC SUCH TllU POINTS C 00 0 ARf: IJ (llJAl HEY.lf I!)( POINT Cl CHANNEL PROFILE PflOJ(Cl NIJ, 1 ORAINI 0.1.TE1 (ll((l(01 D.ll[ I IW IM·U:-08 ""'' AS SHOWN URS f.l:dCo'l-t:n'°'r'-t-; A•nsk<:: SAL Cney..-c,.-. ~Jo,...,_,.., Arcie•; co Exo•o..-a-t 'O"' c"d »rod'-;c;-t ;o~ 1~SO IUctvraid Ave, • llruatai. 1)( 11042 -12111 S29-3100 PICEANCE BASIN DEVELOPMENT CENTRAL PRODUCTION FACILITY PAO EROSION CONTROL DETAILS OllG. NQ, Rtv P8SR-598l6AVf-CIV-DTL-\JRS-00000-00001-00 0 ·>. r .,. ... :::;:" l AR8nQ91y s "- / ">t ..... \ _,;:::..' .-,~ ,.. ) '---,. '\ ( . '"''\,,,~( -· ,.. ... 1W01111111 .._ ' ( .... , ;' ./ / ..) ,-1-. l ,---'-.,/ ~'·~·' ' \ '~. ft.: ''1' ~-; . ·~ ~ l ,,...- "'": - )~ ~ "'· . . Chevron AREA: WESTERN SLOPE FIELD: SXINNER 1t10GE CNAEP. P1ceance Basm ........ MldCont1nonVAla ska seu PROPERTYUN<OUE· ~ Chevron N orth A m erica · Natural Gas Deve lopm ent Pro gram ... Exploration and Production PROPERTY COMMON: CO: MeS&-Oatfi8d ST: CO Figure 1 1 PROJecT: ~cEANce a.-.s1N NATURAL GM oEV£LOPMENT PROGRAM I DRAWING: SK.014-14-11.()30.001 I ~ I was ELEM: oosr CENTER: I PROJ£CT I PROJ<CT I REVISION f °"TE ~ Wa shington Group Inte rnational REv1s10Ns """" ,. "".,.. """ """". 1 M'E NO NO 7IOO E. \.Wort"""'· .o.n-. CO I02l7·(>o>}143-2000 FILE: APPfiM>' SCALE• SHEET SIZE· 2'41136 2902i-003 I B I 3 1Jut.,.0 7 \ ) ' 8 ~ ! " !2 "' l ~ I ! t; ~ 8 'Z i~ ~ j ~ t;w ~ i~ I I 0 ~ ~ ~ L ~ ~ 1j w .. ~ n ~ i ~ ~ h' ~ u § ! ~ " ~ § 0 t; ::> u ili f ~ ~ " c:;. I!! a: 0 n r ~ ~ w w .. , $ ~ 0 0 ~ i g: g: .li ~ ~ c ::i .Q ~~g • "'t> "' "'0 0 =~a: ~ iii ~l: ~ > c t: • w ~ 0 c a: s Z o ... cZ aee 0>0 t>~ii fo~ J)) ~ ii: ii j E ell I ~ 6h 0 " ~ .... s ~ 0... Cl N a. ~ 0 Cl) ~ ~ .... z ;:I " ' CQ .~ 8 ~ 0... I.I.. 0... ro 1 U.l ~ c <t: -~ z ~ ~ u I ~ e (") N If) ci 0 ) -,) Adjo ining 21 69 l ~ - TRAC T 86 2 169 - 2 1'' ·-· .. ~... " ) ..... ,,,._":'.:" J ·~·..,I TRACT 76 l (§) ' s3' TRACT 79 '(@~ ~ 0 , f-----16 --------'--l>'h<TAACl(e ~5 --+--lA\l-~-~,--4 ( rRACT e7 TRACT 85 I TRACT 8J TRACT !1 1 c+J I ' r __.! TRA r n ,@ ~ f9s2 . ~ ~ TR.A T •2 B.L .M. ~ ~ TRACT 90 ~~,.,~ ,,. TRACT 92 I TRACT 88 @§l r---TAA<_'_l~9~1 -~7 ---TRAC~,~l-8-9--4,~ l j ,,) ' 8 ~---+,=ml=F'""'---'--,A-9 -r-----+--1- IRACT 40 / r-oe f'Y/1) ' TRAC T 104 TRAC T 103 ~ ~ ) I ) .s t l lji .. I. 8 ~~ "18 --..~-...,.l, --'f.i/) BLM Parcel No. 2411-082-00-954 ,+ J. + %,,.,,,,,~,,,, ) "' "'I I ; ,, ~ 20 TRACT 9 5 TRACT 9J TRACT 109 TRACT 107 TRACT 1 11 TR.ACT 110 TRACT 10!1 ~EL 60J 6 TRACT 1 IJ '. ' TRAC T 75 ;T • 10 TR.I.CT 10 6 TRACT 118 TRACT 11 9 ! B. L. ~-50UN0A..1":Y Frank ., Payn Wanda M He ck & Theo re 0 & \ ma J Maydew (25 %) Se ed Mlner a Darcel No. 8029-041-07-000 ;r 2U5-0 4J 00-002 I APPROVCO; ------------- . @ 8 .L.M. ,,33 34 i iT I TRACT 71 TAAC T 72 . TRACT 10 5C TRACT 11 6 TRACT 117 TRACT 121 T TRACT se TRAC T 69 TRACT 55 TRA.CT 66 . { .;_ I . TRACT 52 ~ n.••» TRACT 63 1 t !. .J. TRACT 5 9 ' TRACT 60 ' I 11 12 r----------------+--------------21~ ~ g ' ~,,,', /, { ~ ,T 23 35 1.l 36 ' El. 8 J 79 i ~ ~ ~ 3 ~ 2411 Township 7 South Range 97 West t K IMBALL MOUNTAIN ~ Opal C. Latham (21.875•/,) Severed Minera l Parcel 8029-054-07-000 Pauline f , (D uffy) Latham (21.875%) Severed Mineral Parcel 8029-057..07--000 Leslie C. & Juanita L. Davis (6.25'1.) Severed Mineral Parcel 8029-100..07-000 @) B.U.4 . ~ . ..,. 9.Llil Norman . Flasc he (50'/o) I""""""""""" __ ..,._.,,,_ Severe"l'linerals P~~,°),,~~-a_o;~~;~:(~~~.~ Severed Minerals Parcel No. 8029-037--07-000 BLM Parcel No. 2413-222-00-953 Mark H. & Mau r n A. I Trus tees (2 5'1•) Severed Mine ral Par cel o. 8029-046-07-000 Te d E. Lough (2 %) Sever ed Mineral Parcel 9-07-000 ~r-~r--------t~~~~~-r~~~~~-t-~~~~1.1..1.W~~~ I " c 30 " " " E.C. Role Seve red Minerals Parcel " G " .. J ack Armstrong (<t.17%1 S e vere d Min er ls(SM) Parcel No. 8029-001·07.()()0 Harvey Arm 1tTOng (8.3 %) SM Parul No. 8029.002·07-000 James Lou is Armstrong· E1late o f (1.3 %) SM Parcel No.11029-003-07-000 ............._ _ Otto W. Armstrong (B.3 %) SM Parcel No. 8029-GO<t-G7-000 ~ J udy Armstrong Johnson (•.1 %) SM Parce l No. S029-G41-G7-000 ~ LJ .. wi &rJ Otto 0 . Armstrong (50%) Sever d Minerals Parcel No. 8029-005-07-000 Howard, M>n ald, Floyd Ga lyean (2 .83 %) Severe d Mln e rals:ttMI Parcel No . 11029-1 Each owns 4.13% ln1. Surfa ce 2•13..J6 G ret a Gatyean (25%) SM Parce l No.1029-15 + Ke rine th W. S a n 1rfle ld (2.38%} Severe d Miner Js (SM) Parc1I No. 8029-213-07-000 Dean Sulzer (7. 14%) SM Parcel No. 8 029-214 -ODO Darrel Satterfle ld (7.1•%) SM Parce l No. 8029-15-07-000 Jean Har1 (T.14%) SM Pa rcel No. 8029·2115.07· OD Neola Galea (7.1•%) SM Parce l Ho. 8029 ·211· -ODD Rhodora Sa Herfleld (7. 1'%) S M Parce l No. 80 -218-07-0DO Joyce Dye r (7.1 ii%) SM Percel No. 8029·219.Q -ODO Vickie Burke (2.38%) SM Par cel No. 8029·220 7-000 Brenda Es p ar 11n (2 .311&'.J SM Pa rcel No . 8029· 21-01-000 Jun Ha rt (3.51%) SM Parce l No. H29-222-07-DO Neola Ga lu (3.5&%) SM Parcel No. 8029-223· .ODO 0 H n Sulzer (3.58%) SM Parcel No . 8029·22.t.(J .(JOO Darrel Satlerfleld (3.5&%) S M Pa rcel No. 8029· 25-07.(JOO Ke nnith W. Satterfield (1.19%) SM Parce l No. 029-226-07.000 Rhodora Satterfield (3.58%) SM Parcel No. 80 ·2 27-07-000 Joyce Dyer (3.58%) SM Parcel No. 11029-2 211-0 00 Vickie Burb(1.19%J SM Parcel No . 8029·229 7.000 Brenda Es pa rsen {1 .19%) SM Par cel No. 8029-30-07-000 E.C. Rol ey (31 .25% Oil & Gas) S eve red Miner~!\; Parcel No. 8029·0 6·07·000 2413 Township 7 South "' Range 98 West O.R. & Marvle V. Hudson illard E. G rah am (•.17%) SM Parcel No. 1029-15 7 -000 Severed Minerals Par cel No. 8029·045-07-000 AdjolnlQ&: 2443 ) ) "' ~mR~!!!ll "" c "' "() 'ti' < f------511 "' 0 0 I 0 0 I ... N 'j : N @ B.L.M. Chevr on USA In c. Parcel No . 244 5-17 2-00·009 I 18 COUNTY ASSESSOR B.L.M. B LM Parcel No. 2445·1 01 ·00·951 B.L.M. 17 Adj oining 2411 Boundary 16 @ B.L.M. 10 11 14 15 Boundary · Ol :r: I "' " ci z "' x ELEV. 53'42 " ... < "" c x " B.L.M. E- c • .,, c , 0 "' @ <§) 13 N "" :r: CD I "' ,... ci " " z N "' "' "" ... :: < c ti() ·o c ·~ ·-"O ~ < .... 2445 To wn ship 8 So uth R ange 9 7 West Adjoining 2413 @> 8.L.M BLM Pa rcel No. 2443-033-00-951 B.L.M. 12 Boundar -~~:C:C:::=K::::==::===::J~=======rr===-===-4=:======="'=========:J:========1':::======:i:======="===~~~~f'-~--'1~3·--'a~ou~ndaoorr~-r--i ownship8South " " Range 98 West 16 2443 APPROVED ----:cco:::u:::,TI:;;-;ASS~[S;;;SO"•'- \ , .. ·""' I ~.· ' ," ,Y . ·' •' . .. JI " BLM Parcel No . 1913·292-90-952 r J I Rio l3la11co County I I \ \ ,. I I I v ,, I I I I -;----{ ' _,. -1- l 29 @ l ' Exxon Mobil Corporation Parc el No . 1913-323-00.Q~' \ . I I '\ " / I JI EV Ranch LL LP <--.,.Parcel No. 1913-284-00·004 / / / I I I \. / / I . I ,. ,I '· ---~..---- I I I I I \ @) I --------- ( 11 I l •.. •"l Exxon Mobil Corp. j83.8%); Levy Brothers LLC (10.8%); JoAnna U(Hc\mas Trust (1.05%); Con nie Hinman Trust (0.98%); Virginia Hinmari'T!ust (0 .098%); Stuart A . Umpley Trust (1.05%); Cara V. Loe1.ett & Comerica Bank • Texas Co. • Tn 1stees of the Susan G. Umpl ~by Peasner Royalty ;trust (0.7%); St anl ey Lockett & p omerlca Bank ·Texas Co.· Trustees of the Oara Virgini a Umpleby Lockett Royalty Trust f'arcJ'I No 1913:351-00-007 ..,... I / I I I I I '\ / '\ I I ,, / I I I .I ! ~~}l @ <@ I / / )• >11 I ;! @ '\ I I I / ... \ .f .. " ' Y" .J -., ::. "" ,t>- . ' I / ' ' / " ® cs / I I@) / I ,'\,'\. I / Garfield County, Colorado Office or .Assessor 1098th Street. Suite 207. Glen'NOOd Spri ngs, CO 3 1601 9X>.94S934 www.garfid6caxty.ccn Lege nd -Tax Exempl SLM US Forest SeMce Subdivision /V Slale, Federal H;ghway ~ Interstate 70 ~ CounlyRoad Meander-, Govt. Lot-, Former lot Unes Tax 0 11lrict Soundary BLM GCDB Survey Coordinates 8"5EJ.w>SOl.fa l,~ll:~ad citrt o.-~Sd•t-.G~ldCOJ'llr l TD•pootl"""'-(Z002 • .-.udJOOfi t. l USOl IS a ..... .., •• " 'P• d1 ~1·~-'tiv 0 ... 1 .... c ... ,,1, IT D ~t1L1'1 ... I , ... l Cel .. U.. 0.,.-i .... 1 IJ f•M-t••H• lhf•-, c .. t .... •'IH GIS •t1.a. t~l- PAACElMN"SQ.ICf t. Gl'I'~ Coll'ltl ..... Mtloof•Otlco l'M.,.IMall'Sw ft, A.1oCA!> ,.,...Pt. llll"~Ma:l toCllSQood •-l"'"'•t :IXl!I l'GHtU•·"tac:aoip,1 .. m d l lt.•• ..... ll'W t~oA-IOO, •l -~.Htll ••c.I ..,..,.,...,.,.11 t.o •.,.,_. l•-~ao ••C4C> ... ,.. "Iii" .. _ .. ,_,,, •• ,.fl M ... 11-•tllollt.o•t1to1 .. t.1\ ... IT011$.Wl'"' ... 1 1 ..... 1Mt"11.i Mcro ,...,t.r •-••-••••~••1 T•• ••,,...-~,., •.w •• ... t ••· ,..,..,_,!>•• •h•l"'""'"•'8t'• ,.._ • .. ,,.,., -c-. or ••,._..,., ...... ..,., .•.•• ·~,., .,, .. ...., ,. ...,.,.. ,, o1 .-,,••_. .. ..,_.,. M•••·•~.-, .. ,.,._,,, •. ,,...~ ""V"•~ •••I ~v~~~~.':~.'.!.~:!.:"'u~/:::--..;;"::"' _._ •"7' • 1913 To wnship 4 South Range 97 West 0 PrcjecUcn: UTM Zone 13 NA027 0 5CIO 1.000 :UIOO l.000 •.000 l Inch equals 1,500 feet 1:18,000 n.1MO/S t tNP '"' Rio Bl.1nco Coun t y ' I ,, Garlltld f 0<m ty @ . @ ", v' . '\. \ ® " I ,/' l. ·, '\ ' I . ,,_ / . / 1 • I •' \ . •. /-: ;'' -/ t---j I -I 'fl .... "· ',~ ® -,, '\. I @ /I I )II ' BLM Pol:Cel "'19. " '~ 19 11 -30 1-00-955 UJt..CS1~0-'H l ~arris ~Doyl e Lives tock LLC (37.95%1; A merada Hess ,, j •' Corp (37 .05%1; Oil Shal e Corp (25'1.) . Parce l No . 1911 -272-0 0 -005 ·' •' / I • I •' l /. \,.,,_,, • Co~oco Inc. (30%) Jf • Jl Chevro n USA Inc . (70%) Parcel No. 2 139 -05 1 -00-01~ ., '4 1f)'1.0S1.()0.0IJ ® " I I ol' I .,.. @> \ I /' I / . ,{ 1 1 · ,, I, ·1 '~ ·, / ~ ' ·' f/ 2J -L ,. \'.;, / BLM Parcel No . 1911 ·34'1-00-952 I \ @ ,l ,./ / \ 24 ' / " ,. \ ~)1 • / i ~ g "·"' / @ ~ ~ ® ~ '\.,. Ga rfi eld Cou nt y , Col orcdo Office orn .. Assess o r 101 It. Stree4, ~ 207. Oen-...ood Sprir.g1 CO 11601 970 94S.9Gl WWW g •li .. d-c:cu nl y ocn Legend -Clller Ta x Exempt BLM us Forest Service Subdivisio n /\/ State, Federal Highway rv ln!erslale 70 /\/ Counly Road .,~~.,~ Prtvate Road . Trail Meander-. Govt. Lo t-. Former Lot Lines Tax Dlstrlct Boundary BLM GCDB Survey Coordinales I (~filHdctNt-~l d•l1,0 ..WidCWW:y t TCt111 .,,........~1001. .... 2006) 1uso1 r .• o .. ..,, .. 9'•Mt0•d ?l"lldbr G•'-'"'°""'V IT o ... LOl ... I '""· l C .. ttld:I0'"".,.,..,1 11 t1 ..,_1a .. Al\.9'•ar e.ol•l1llU GIS<I ...... , ... , f'NICfl.~SOl..Kf.. 1.G 1of ji1111C•inl)'Al.M•WtOlk• ,.,w1u.,s ... M.A<1:aC...O , .... Pt. m~~.,.ld toGISQ1oh11ot,.M l0t'"'• (ZIC. 1.r"'r~·'""_,...,,..,,...,. 111 1 .... .., ._ '"• •-•. •• .,D~•ll'lt t •aa. lfl ...,J*'th'"11 h l,,twl ''•"'' 1 1111 C AO""'"'"'• .,.,,,,11N1 t1 1 ceo11l11d 111 1 11••• '11..il bl <l,~l·•Nl tf l ~UT 0 ••1,,,11'11 1<6"' 1"1 1'1 .. <1-1 ~l>M bt..,...,t d _,..,,.,,.._ ... ,, ,.., .............. ,..t,0•.,·•( .... ,.1 c.p. ....... ,_ •• , ••• •:.. .. 7 ,. ............... ,Q 1i , ................. ;-...-···· ........ TU'~.A ,.,,..~,, ,,,~,. ........ 00 ,._ •1 .... "'•"'"'1 I••-. I • •• o o..tc'-:. '"' , . ., • .,.,.,....,..,.,._,.s1•• 0•1111 .. ••'"•--·-11 (...._.•~•· ••("U"'I r. •' •t -.,,.J,., C.!'l.<.t •• •..-o 0 1~,. ~ ,,,. ,, ."I" ""'' ~ ' ,..,,,_, ,.- ~ "' "'" _,,. u + •~ ,,.. "'' 1·• """'..-'' "'· ~ f"'../>V • w ,,., h •-• ~· ::1:::. ":;:: ·:: :.:;-.. ~. "!" :' ::.,· : ;.~· ·~· :~ ~-:-:..--: :-: ''' ,, ... .,..-i.-••• , ....... M-.-<l•r t .. "''''"'' -....... 1,,... ......... 0 .• ... .: .......................... ., .. ~ ......... .. ~.r , ·~•""-:a ••u '•• ... ___... .. , ... ,.,...._,,, .• .,., ·-··I ~ •t •I • ---...... , .,._,.,, ._.. ... o·' -~ ··~.,~ ... ·-·····~· ....... ,,_.,, Garfield County , Colora:io Office o11he Assessor 109 Sth Street. Suit e 207,Glenwood Springs, CO 8 160 9JU94$991 www.gatfid d-co.nty.ccn Rio BL 1nrn Co11111 y Legen d ~-/ ,. \ -TaxExempt \ / I. BLM l ' .J US Forest Servi ce / @ ' / '. Subdivision State f Colorado Mobi l Oil (50%) ~ Slate, Federal Highway / I ,. Parcel No . 909·232.()0.()0 5 Pickett Land Co (40%) /\/ Interstate 70 l .~ 21 Equity Oil (10%) I 11 Parc el No. 19 09-~43.()0.()0 3 \. ~ Cou nty Road I j .' u Start of Colorado .. r•.,/ Private Road , Trail @) /f @I LOV Land Cq : Meander·, Govt. Loi·. Form er lot lines P;ttcel No. 1909-223.()0.()02 © Tax Distric t Bou ndary ."-/ BLM GCDB Survey Coordinates " ~ @ I ::: \ :l '.) ~ 21 Jf.05t.OD.Cfl ~ P a ul M. Marriott, Kathryn Dougan I 0 P ar el No . 1909-273-00-007/ :.. "' ::: ,. Conoco Inc. (30%) :<: ,, r "' ::::: 1f Chevron USA.Jnc. (70%) ,. -· P arf •I No. 2131 -0 51-00-01 2 I I @ @) \ I I .. , I c~ .. .,.Cll"•""'" C.PS1111a.G .. 1 .. 1111c-r1T D•~M"-.(2002, " i ... , ... 1'0Cll ~ l 2. U IGS 'r a ...... .,lll•"~•dq•1 •ud ll'f' o .. ,, ... c ... 1111 IT 0 1o:w1,,,.u , ... --'-I 1 c.i.t .... o .... l .. MI d Tt a'IWllU••• ........ ._ c ... 1 .. 1 '"" G.IS •«a. ,.• ./ , ... , • ./· PNllCa'INIOl.lltt. <i.ii> ,. I G 1i..W~A6 .. sooo"10lk.o ,. .. otl ..... l -,A;1 11CA:)U ,...pt. >. -~M..t lt CHSOllOdl.ot-fo<.,• t lXI• BL M Parcel No . <@ I 1. .. lll•••ftl.C_l .. o:ooiolUr01 ,.,11J1 lPJ l "-A--,1U _o.i,,...1••Dll ,1l '...._ 11\lllf"'°"•l H •"'ll"' l•o~d1 11tal C AO d •t·•<•;it ... """''lN b 1 1 carhl1N 1909 -322-0 0-951 .,~~•• o< ""'•II b• d 11tllld bJll'lllT 0 t$arl,.,.,1 lro"'1 ~1 11111 11 d-1 phOl'lb t '"'•~•oloo·""d '11 ••tM""lllJ Jl I ... ,,.,..._ .... t"o 1;.1 ... c ...... •, 10-.,.'"'"''-• ••1 ... ....,11oo .. ...,.~, :JJ ,,,,.._.,,. ... _.. ,(;t• l• .. ~\ r l 't--·· ro ~·r-.. 1 0 <r.J •;# •#•~ ........... ., -.. --"J ........... ft o G S I •2 • ....-:~•• ... .,, ••> ....... ...,..,._, .. ,, ........... .,.,,,,...,. • ,,, l 't( ....... JS I .. _,,_,Cf! .. IO .. _.... ?f0'10 I '7 • fllll -•> IJ"'4 U' JI ·••?•" #\h .. -·~ -.......... ,,.,,'J'&",., ..,,.,,, .... ~···· ...... ......... .-..,,..,...,._ .................... ,, ••• >w .,,,,,_,... .. ....... --..... _.,, ..... ~ -... _, ..... 2 ... 11 1 •1 0 •• .-., .... -••• ~ ..... ~''"'' ,, ............. ,. '' ...... --....... ~ -·· (i .... ~ .............................. ·-.... ,., • .,., "' I 'I ··11-1*·• ,,_., ••••• .-,,. .. ,,, ... ~._. ,,_,,.,_,,..,, .... ~ •• •.J>•-1 ._,,, "I '" "'' _. • ~ or-..... l•J W .., 1 1 • --,,.,,_ "'" '-\,. ' ~, ......... "o ....... •I">',_,,,,,., :if 1'•1 ""' A " " ,1 ,,1 11J9 05 1-00-011 / 0 ,/ / Towns hip Locator Map / / / I / <@ ,, ~, / " . ., / I /t Ci!)) 'l, @) , .I / / .. ' "' / / / I ,. .I ' / / " / / / / ,, / / 1909 / ' ,I ' / l@l / / I / / / @) / / ·' ,,, •' I / / / , I / / / I / / / Township 4 South \ / I / / Ri111ge 99 West ,. @l @ / / / ,I / / / / / ,I / I 1· / / / 0 , 0 I / / / // / »,...._ / / / /, Projection :UTM Zone 13 NA027 ,I 0 lOO 1,000 l.000 "'" •.000 '"' / / ,I , 1 inch equals 1.500 feet I' 1:18.000 ' ,I / // y / / ,I / ,I / / /( /' ,/ •• '1#0dllNtl or , ti / / / l'.1/I / / / / / ,I @ / . I / / I I I / / / / / I / ,/' / / / " / . "\. @ I / 1€) I I I ' BL"\ Parce l No . 213!.064--00-952 ~ ;1 I / .:. ® L . ® ~,.i ;' .. / • Reuben Gerald & Stephanie p. Oldland Parcel No . 2135.073-e0.003 \ BLM Parce l No. @ 2135·1 4.00-956 1 ' y ,/ Y' 1 Chevron lllil\ Inc. • Parcel No. 2135-291.00-008 /' / \ \ JI / ' ... ,. •' ' \ ' , •' I •j Berry Petrol eum Company Parcel No. 2135-321.00.009 ,/ ~1 f' 'f I ' ' I f I -r I 1• 'I .._, / €!J / ' y .~· ... ' ,/ I I / ;I I I . ,. I. " ·1 }• y -/ "· •' I I ,. )' I / If ,1 I ,. Enca na Oil & Gas (USA) Inc. Parcel No. '2~ 35 -273 .00.015 " ... . '. 1• ,/ ' ' / ,. . ,. / ' / f5 ,• y ,. . " 11 j / J@J \l .t- ,. . I I 1. j I ,• .. G . •' ' . I )' . ,. I ! \ \ - t . ·r "' •'I I I ,. ,• ,. 14 " ,/ .I ;' I ; ,1. ® ' ,I .; ' ,. I ·' ,, 1 1J J.o".oa.o~ fl IJ /' I S ,.,, 1- '/ 117 1 ~11'...0lt I / ,• .. ·' ---,, . I r~u ' " /-, / / I ./ / / / / / I • .,. I / I Garfield County , Colorado Office ol the Assessor 109 &h Street. Suite 207, Gtenwood Springs, CO 81601 910.94596' www.gafidd-o:unly.mi Legend -Tax8oempl BLM US Forest Service Subd ivision Tax Oisltic l Boundary ~ Stale, Federal Highway I'\/ Interstate 70 ~County Road .•t\4" Private Road, Trail Meander-. Govt. Loi-. For mer Loi Lines BLM GCDB Survey Coordinales l.CIM'ltJA0-4 ('1~· ....... ~Scftt• 0Mf•lllC<alllrl l Cff"ll,....._1'°°1. r..-1Md 1CIOll ~. l USGS 'S'Owld'lfl'llM Cll ·~1 •lld ty 0 .. 1,.,ctc o.'""" o .... 1 ... 9'1 , .. , 1Ctto<.no OtS•tm.11 Ill ,,.,_, • ..,"''""~-''•'"'" 01 $~ , ... , PAACCLWP 50..fa. I G1i.W~A.1.lftd10lk1 ~ .. c.t ~S•~"~l ·.-..pt. ~.,nrt~lo GISGeocflt-lll'.,, !<D:l~ . l,4ll P 1ftO.loC(llpl aiOu ll th '"'lllPt'I L~A.-r .•l -H1....,I J•,_ """"llo"'V.Oll t>••,.olll l•0.,.4•1 1ri C .t.C> •••••"II" "'-·l lM I~•-' f•N ..,,._0111\~l bo<S>11 h t•t b1 1 ... llOc •l"'•>l h Olfl l Mo l19lol Nq11t111"IJ ..,_,,, .. -d;ftS l 9"0"'••J ~I .. I. ............... . ... , .... ~----·~···· .. · llo «•J•"' _,_,. •• _..GI: '• .. l •t •-..,.....,~~--·•·•-.. oo..1•'4 -~ ............... J_.,._ •""····1 "·~·····-'-""'"" ~·· ................ .,. ........ ,., .......... ::>_,_-.. ..~ ....... t .... 1'1 •"'!:'!.~";' .:; :·~~: ~'.:,•.,:..;"'" .. ';.' -'~J~r'_. ~',';,:,-:;, O•l .-41 ,._,. ... .._., .. ..,'lo<..._ ..... ._...,..,, ",,., "'• ,, .4 '"'''"" U'"° '"' "'• ..... ....,.vt •;-f _,.. •.• ;; ~"'· IAf • "·~ "'l"' Y' I''•• I I ' ,,,....,.., _,.,_ •••• '• "'"" ·~ ""•~.1•• •• "._., ., r • "'"" .-.... ,,. -·· "t; ... t ... ...... • •. , ...... <•4 4 "~ • ·~·,,,.,, • ......... .,...... •. ..., •••.. , ··•-po,.-r••· ............. ,, .... .. .. "";~ .. ~~·_, .~~:!~r."" ~~ :: .. :·.i.~~·'. _._ .•. ,. 2135 Township 5 South Range%West 0 Projection:VTM Zone 13 NAD27 0 "",.,. ,.,. l.000 .. .,. '"' 1 Inch equals 1,500 feel .~ ...... 1:18.000 11!ot~S9~ _,.,......, eld County D'~ ... "*~SH.tJ ... .,, o: ...... .tt,...._C<l lltel t 71'.t .... U H •U "' t\At.uuorP•.u.IMitPfi\213$ R1\dell r· 4-1-200$ I' ; " ' : / I ) --+/-1 - 1 . ~·~ .. ~ ....... BLM Pa rcel NJ 2137 -071--00·911 : EV Ra ~ch LLLPv Par el ~o. 1 9 1 3 ·~~?,:9,P,:&j>~, .I ------·- I I 19 ;/ ---;/---.-'/ _V ' ,. /f / 1 ,. " '1 1 Chevron USA Inc. Par cel No! 2137-153--0 0--0 09 ' ' I, / ,. ·1 ·~ " ¥ @> " I Chevron USA Inc.I Parcel No. 2 137-22 3--00 --0 03 C hevro n USA Inc. Parco;,I ~o. 21 37 -2 8'3-0 0 -004 Ch evr on U SA Inc. Parcel No. 2137 -321-0 0--008 u " / Chev ron U SA Inc . ·p ortion of P arcel No. 2137-1 53-0-0-009 I ,• v J 'I / ' " / / / ' t /,.Eva & Timothy Uphoff Par cel No. 2137--0 12--00--001 @ ,, vi / A / Ch ~vron USA f~c. / " Parc e l No . 2137-<113·00 -010 II ,. ' / / H Chevr on USA Inc . portion of I' .1 w I Eva & Tlmo lhy Upho ff / 1Parcel No. 2137-014-00-011 ~ I C hevron USA Inc. Parcel No. 21 37 -253--00--007 @ I' ,,.,. ....... T. ~ I~~ P a rcel No. 2137·253·0-0·007 BLM Parcel N o . / 213 7 -362--00 -952 I I / I Garfield County , Colorado '--"--"'-==:::::; Office oflh•Assessor 10981h Stteet. Suite 207,Glenwood Sp rings.CO 8 1601 9J0.94S-9134 www,garfo1d-carty.ccn Legend -T axExempt SLM US Forest Service Subdivision Tax Oistricl Boundary /'\/' State, Fedet"al Highway A/ Interstate 70 /'\/' County Road _.r~.? Priva te Road. Trail BLM GCOB Survey Coordinates l .~Ro'4C11<1 •tfoneG~Sd•t-.Garl41dCcr.lcytT O~a ~"'..-t.(2002 . ..... 200tl). 1.USGS 1.S 0111111 .. ;ote M ''" d go1i19d 11y G•I el d Co...M~ tl o-..1r1m .. 1 , .... l COl 11riojo D.,1r1,.,«1t al Tt .. "'CIO'I• o~ llll "~ Qtn1.,!i11t1, G!S dtla. j ~!W~. PJ«:El l.W"SOl.RCE. I _ G•.f~ Ce>llll)' .... M•10l'•Ctfc• Paroe1 ~s ........ A~orCA.D 14 -~ i:ic-11•t tlitclloGISGIOdl•-f0t..,•!D,. 1. f0'10fO"•llt llC_1 ... C.al !~11mmp lly l~I A -KI<. all ... ~Hq ..... I P•Oll <'1-"'aet ll'lell btlnp..t from d't'lal C A O dra·"'"" '1Ubm il 1N•~ ,,.,;,f1td .,,,.,.,or '111111 Did 911iad Dr 1 ~• •f 0.,.1..,oru '''"' 111a 1ego1 d""'•Pl•Ot<bJ ..,...,lClf<110t d1,.•o~.i'~ '3\ICUll\Elt fl'•••~·••"'n..""t-,ch.-••St• ..... ·1 l l)ocio·'l'.r •~• ··~ ... o.r irc~-o-•v~ ,~,-~.., 9)..,...., l0 1•\ f•• ~ l .-.J •II __ ,_ •• ~1 111" ... n • ,.__,,.of '"''"""" ,. .. .-, .. -• ~...., "J .,.,, .. , ,..__. H -tG I I"'' •'"-"""'t··• I~ '""''il"·••..,...,,.~,_.,..,, . .,,.,,_,,.,.~"ID_,_,,. ,._,-;._,-,(<n .,. .,.,,,,., Of'loo •• ,._ .... , 0 '•·.<. ",,. "f --_,,,,, -:~-•,.. l'I •t "?-.-•.:I l 'o ~ .... .,. , .. ,_....,,.,_.., 4 ';"'7~ < f'J< "'I~ 1•_., c. .... ., ......... ,_ l..t.-l '"' "1<• ~ ""'"' • ·~' """ ,, 1·· .,,,,_ '''"" ....... -<»I ar-... ,..,.,4 ·-.. ··""~··:!Al .. ~. ~"'l" _, ,. ' ..... I~• .• ,. .. .,m ..,..,._,~ •• , •<W-•ot.o.--•or4._,,,..11r• .... .., -'11 •;n~ 4'oY• 0 4' •Ir.,.._,,,.-•• "" • ..--..-· .. 10> t~•H O.Ml!Q '7 IU\'--~ cl·~·-'·'~"''*'" ·~r ~·"''4•~i" '' .,_..._.,.,..,I~·~-•~ .,_<UO , 1· r,,. ¥--1 ~~~~.:~·~ • ..-~~!:',~,.";;:_,--:,;~·;.::.""':.."'• --~ .. ,, .. .., To w ns hip Locator Map 2137 Townshi p 5 South Ra nge 97 West 0 Projection: UTM Zone 13 NAD27 500 t ,000 2.000 3.000 •.ooo Fttl 1 i nch equals 1,500 feet 1 :18.000 I "" -eld County ~::::=::i.~-"» OJ•,.•;odf~C:Ofltcl •n.•.u.u n./J'f t\At..s1»0l'P•tt"e/lla~l21J1R•liism1:+7-10ot; / / / I' / / .. ,,, ) / /"-.,. / / ' ,. , .. BLM Parcel No. 2139-062-00-951 • r.1•,~ f-,.tl."( ,/ / / ,, y' / -?"-- -·' ' Chevron OSA Inc. Parce(No. 2139-064-00-019 ,t ., T Conoco Inc. (30%) 1 ' Chevro ~ USA Inc. (70%) Parcel No. 2139-074,00-015 , ~ , .. 18 ,; " I J ,t' I -i- I ' A v / I 'i 30 2 "1 -251.()0.()f J ,• ! ./ I I I I ... / I ~.i -rr ' ..L ,A r'!.l ,.._ ' -~·· I ,I,' I •nn " \ \ I , I I .._ / I ,.• Conoco Inc. (30%) j CheVJOn USA Inc. (70 %)' Parcel No. 2139-051-00~ 2 Chevron USA Inc. / Parcel ~o. 21 39-174 0-016 ... J;olorado Nature ~nch Parcel No. 2139.34zjoo-009 I I· " i 1\. \ ,. -/--,L __ ------ ,; JJ I \ J. --~ I 1 ,y .( I I 'f. -, ,• .. I ··' :r~f' , . / / / '. @) EV Ranch LLLP \ I \- \ ___.,,___ \ '15 . \. "/ 1 I ··\-I \t~ -f "' " . ··® -I T. ByA Parcel ~~:· I 2139-111-00-952 I I <---~ +---. , I ; J .; ' i . \ JI . ., :; \ Chevron USA Inc. Parcel No. 2139-131-00-005@" ,. IJ / @ ~,,~. :T~--=-~+-.-r-, __[_,:.._ EY Ranch LLLP ·' , J Pa rcel flo. 2139:183-00 -006 \ ,; 1 I ,• .. ,• ,• ,I ·' >/ " i ,' '· Chevron USA Inc. Parcel No. 2137-153-00-009 ! I ... ,• 1J'JMSJ.OO.fJ09 BLM Sever8 d Mine ral No Parc~I Number In A ssess or Records I Garfield County, Colorcdo Office of the Assessor 109 6th Street Surte 207, Qenwood Spri ngs, CO 61601 970.94S9m www.gafi~cJ.<Wnly.cm Legend -TaxExempt BLM US Forest Service Subdivision Tax District Boundary ~ State, Fede<al Highway /\../ lnlerstale 70 ~County Road .l '\'f'' Private Road, Tra il O ther Boundaries BLM GCOB Coordinates 9.A.Sf.~"""SOl.K.l. 1. Co.11:r bf Ol"ltrlfw G~S dill. G1..,,e:cl Ca.rt, IT 0 1t11ntr>H . tXI0'2 ..... Md2004t. Z.~~~ 1S'QyaJ1aio;j•IA •"°d•11'l•udhG•f• .. d (9y11\r IT 0 t'(lirtf'IWll l Co1.,m0"'1'111m .. 1 cf f•.,""orl• '"h a·,.~ c .. 1.1.,,.., G!S d•ll. (ZllWI. PAACEl~SOUIC£. l.G11ft~Co.rt;Aiwnal'tOlk1 ••0.I Ma(l S.••t. A"<CAO u ,....~., oo"~.,lld10GISGeodi1 lttil lu111a (;.JOO !i1. 2 '"'t~·••"ll ""'°l>titnC:.ol th,tm op by l ht Ai-i<I<. Ill ~~i.i •.,I o •cot d>_,"'1 .... ,u b1i11p yl l ram d1g,1•CAO dr-111gttu,m+1Ud b r •-toltal ltlQoftMI °' .... li l bld,(>l1lfd ~r lll•IT o .., .. 1 ..... 1fr-tU r~ dlll5Cl1,.IOA t (millao'ltDl ..,or4'"'"'ll'"O"'•lll 2139 Township 5 South Range 98 West 0 Projection: UTM Zone 13 N A027 ""•'c~:::::·~··00-. .. •'·c"°:::::==='i·"'°;;;.. .. ~'·'00 1 inch equals 1,500 feet 1:18,000 .~ -eld County J 0.?<11 ..... - l"8Ha ... 1J•d 01-..ow~"'(".r.01 f7'f.t.U.IJ11•/ffl tlA.s.s•uat\P•rt:el.l.l•p.1;'213~ Rt..won I: 4·1-200fi \ / @ I / / / ;' , / 1'414J14-0U-001 / / ,, ... ~··J.i.1 j / / , 11 JO JI ' •' + I !. 'i \ / / --,- ,. ,. 1141 ·054--00-016 >" Franklin Dee & Vicky L. Norell Parcel No. 2141-054-00-016 / / avid G Manter (12.5%); Carolyn L Ansari (12 .5%) --~-=:..i· Parcel No . 2141 .,092-00-017 . ,. / Kerogen Oil Comp,any ·~:• Parcel No. 214f ·23f".(J 0-006 '-· I. 1 1, / / •' r. ,· \ / ,, -I ,,._ ,. ... +:, .. ,4 ·' ' ,I •)-> 7 ' ., .: 10 15 --/- / / / > / ,;y., ,/ / ·' --,/- / ,. •' ' I .. •' / d onoco Inc. (30~.) 2 'ch~ron U,SA Inc. (70%) Parer No. 2139.(J~,:o-020 J ,.. ' / ,. ' ~A",.,,. Conoco 1rib. (30%) Chevron USA Inc. (70%) P ~rcel N~. 2139.()74-00-015 21 39--074~5 /-, ,/ / .. ! / ! ' •' ,/ A • " ~,, " / ,. )' . . 12 /' i I I ! i I / ,, • Conoco Inc. (30%) / ··r .. Chevron USA Inc. (70'JI.) ' I ' ~ ,• ' 14 , 23 " / A Parcel No. 2139·182·00·017 '\. •f f J J 21 39-341.Q0..009 /Colorado Nature Ranch LP .~ l~a rcel No. 2139~34;.~·0; ;;' •, ··'. I ·I' /-,r ,, ,. I / " ~I 1.l ·r \ , ' 16 "~"' \ 1139- t J·DD·' OlJ ,, .. •fj Garfield County, Colorcdo Office oflh• Assessor 109 8111 S1reet. Suite 207. Glenwood Spri ngs, CO 8160 1 971J.94S9t)i WWW.g<Wfidcf-cx:unl)'.001 Legend -TaxExempt BLM U S Forest Service Subdivision Tax Dist rict Boundary ~ State, Federal Highway /V Interstate 70 ~ CounlyRoad //"'-~~/ Privale Road, Trail Other Boundaries BLM GCOB Coord inates 1. ~Raid ot·U!'lnl G l"Sd•I•, Gllf41d C°""'l IT D1i:-runor1:, 1200?, re...Md20CMI) 2. uses TS Ouldr8'1gl1U...-.,,,,,,.,~y Ga.ti ~d C0••1J IT o~ .. 1 ..... 1 , .... l c o•1 r..n Dl'Cllllmll'll ot Tf#lll'Ol••,o~ ll·~·wt Ce'lt.~M\,GIS Ulli (Z«f. P1'R:ll ,,.....50..RCE. I (;1lf1VCo,,qMM11Qf10C.c:e" .... 1 ~s-........ .cAO u -~\, oo•~.,19d to<HSGeoda a....far"'• poo~ Z.F011e ... ng A«a\'1 ... (11 al L1' '"'"'by ....... ,_..,,, oft WbMq•..,, •• ,,. CllMgts.W'r;ljl b•inpwl l ro"'d gUICo\0 4 r-•ni•""b"'''11d ly•'*l•l•llt ""t~-..... .a1 .... ,,. •. , .... v'"•'1 o.,. .. ,..,.,.,,,.,..,~.1.-J., dw:r,~l•On ., ... _...DI OOO'd•n •• ;otOM•:tr "''"·~··•"'"'--'"t0L'"•~<V'f :ro_.,... ...... ~ 1·-10 --.... • . .--ll>G•.;··~ < ··~·.,.., IJi"I..-. ·G·;t, '"'.:,I r J ,..,,,._.,....,. •• .,.,._ •• ""-""" '1 •of••.,...,,• .. •·a -..,--a ..--i,.,,-•""Jl'•G-S o •«••~'-"I " r~a •J'·•..,...,,,~,.,.,.., •. .,"I' ... ~_..•'>;10 ..-.Jl'1 ·-~• .-.-:;"""~<-.,... .,, • .._.,.., c•1 ...... ,,_, :l'l co f ,,, ,.,., ~ _.r-,, •l""''" • •• 'llf'• ~ "' ·~ »"'»-'"" •'lf,'7-.•I ,I' J ~.d ~ '"""-"'"" :O-.• 1)-S •1, ~" .,. ~ ,,,., '" ...,.~ "Q" ..._,...,, ' '"'°' '~" ·~''"Ill-•• _.,,._, '<:o•o-M,,,,•..-11•)'1 X<L -.-·lll .,,._,, _ _, • .,.~.,,,~:#"'"'C" I•• •• ,,,_ .. .,,.__..__~ ... ~ 1 "" .... ·~ N r.c.;lf•"'"' w • .. o '" r•,"' ''°' .-..i t,,,.,.,.,_,_, G.-•H <:>o.•h"'"'"""• .... ..-'••l ~it•An>"..,,,,..,.,_,, •"'··~·•'I ''ru.,••••f<•..-• ;1"'1 :;..'ft'.-•~•.,,. C"• ·~·• •• "'' '>•rfoll .·, •<Y .,, •-" ~-__ ,..,. "4..:lt•J ..,._,...,,., ,....._ v • .. .., "~ ....... , •• Aolll l "'"'"' ,,,.,_ ... 1-·-,.-1 ~ 2141 Township 5 South Rluige 9'J West 0 Projection: UTM Zo ne 13 NAD27 0 soo 1,000 2.000 J ,000 •.000 1 inch equals 1,500 feet 1:18,000 TluAll:GlSt"""p .. ..-,,,oO'JNd e,- ··~ .~ -eld County :~-= .. :~J-~ or-r•""'~goCVlf.Ct 17'.fU.lllf oJ"" l'.l.$HNOflP•rot/M1p"1U I Re~ I . 4 -1-2006 \ 9 J ,. ,I I ,. @ ,. I' ,. \ ' --'• .. , 11 39·3•2·00·009 / ---l - " •' /- Tn1ct82 .. O> .s;O u 'T co ,. rr~c.' 11$ O> .s: 0 u 'T co ~~ 2! ~ ::J. -O> "'.., z-0~ .,, 0 (?Z o--.. 0 u 0:. Q. ,. ,I I r I ) I I 1 t' ,.. I ''"" 115 ,. 1139·163·00·0 14 Chevron USA Inc. Parcel No. 2167--08_1'--00-002 Colorado Natu~ Ranch Parcel No . 2139.Jll2--00--009 ',. Tn • '9 fl ,. / ... ,. ,. '· TrJ;''J r, i¥t,/ • BLM P ar~el No. EI~""~· ,. ,,, .. , '~ I'. ,. ~ ,• J:U '-eLMPar c•:No. " 2167-033-00-951 N IJ ,. Chevron USA Inc. Parcel No. 2137-321--00·008 ... ( Chevron USA lnl: Parcel No. r. :t "' B L~ Parcel N o. / 2167-094-00·953 '""'' 2167--081--00--002 t---~ . ~ ~"' Chevron USA Inc. Parcel No. 2161-f61.-0 o--001 ]) /'shell Frontier Oil i Gas / Parcel Ns>. 2167·36,~--00--023 y \'" "' f ' \ Chevroti \ISA IJ1C. / l ,.~· ' """5 / .!· ,,.,, 53 / ' Parcel No. 2167-151--00--022 ___ "!'"_______ T1.J1~~ " BLM Severed Minerals No Parcel No. In Assessor Records • '> I )C)t)c,.. x )' }I )< ">' ')t ~"" )l)r )')') . y-,,,,.,,, Shell Fron~er 011 & Gas ~arc,el No . ~j167-362--00--023 ·i BLM P~rcel No. 2167-154-00°955 ~" ! ,1L.f ,I •f / ChevronCUSA Inc. parcel N9 . 2167-212--00--008 I "'•' / " / / / /- / ,,. ,. . ''~15 "' rt.1tt60 ,/ ,/ / / I ./ r .'' ., ... / l - I l "''T Cl:N ... ~ '? i! O> "'.., z- ''' i11 TfJa '., l '} .. .· ,, N 0 . .,, 0 (?Z o--.. 0 u () :. Q. .' /·. I' I / 1iutl1 I .· 7,., ·: J I .· Tt.1c1 ro; ,, ,1\ / / ,,. 105 r.1.t /'!(} ,• .. Q. .· rra.-11.:s Ill "'1c• ' ' ' I / / ,• Shell Fronti,er Oil & Gas Parcel No. 2167-362--00·023 ~M Parcel No.' 2167 343-00·964 ) " Opal C. a am (21 .875%) Severed Mineral Parcel 8029·054-07-000 Pauline E. {Duffy) Latham (21.875"/•) Severed'Mlneral Parcel 8029-057°07°000 Leslie C. & Juanita L. Davis (6.25%) Severed Mineral Parcel 8029°100°07°000 I .f I ,I /, ,. I rraas: l l \ / ri1ct 51 Lucas L Renninger Parcel No. 2167°014·00·020 ® / I / '\ '\, / rr1etl~' ·" J 1 ') ,___ " \ u 15 v'- " I ··. •'' / \ Garfield County, Colora:fo ._ __ ...;......:;.;= Assessor's Office 109 8th S11eet. Sui1e 201. Glenwood Springs, co 81601 970.94S 9m www .garlldO-o:uty.cm Legend -Tax&.empl SLM US Forest Service Subdivision Tax District Boundary ~ Sale. Federal ~way ~ Interstate 70 ~ Coonly Road ~~./ Private Road, Trail Other B oundaries BUA GCOB Coord inates t Co\l'llylll011d01-C•""9G'ld1:.,Gtrf•'d COo.11ff'lr01 pen1119 "-{2002 . ..... .-xi011. a.uses 1 r o""'...,~'"' .:i•d ,,,,,. .. ,, Oail1•d c ... ,,1, IT Ot~llfl,....,, ..... S C1l11<NclO~•lll'-ol ftlll'IW10<lll-lllfl*~ O.fllHlo,.-.GISch1 .. ,_, 'N'Cll WI' IOJU. 1 O..C.1'Co.n1~0...1"..ut li.ll 11l-t.A.toCA.!> t•,...~t. -•I N loGtlGeada-llt'"'lllZOll l.,.4llt••,....._..,,_.,.11,,,.., .. ,,011At<it-,a.<1-tt,.....1 p Mc• O'l*"'°"Vlli'l ,ltflP ... f•-... gttl C AO d• ... ·fllt'Wt•on lld 1:y •-Iii edl ..,~A-OI Vllll Udt,111 11d l:y u11 I T 0"•1~.,ilro,.,t'\el ogmi ._.,,. .. ~, ................ .t, .. al.QIN<"lal..., rA90..N\9l ~· .. ·~·••V4.Mf)o;..4•J( ...... •o ... · ., ' ... ~.,, ... tG ... v•V • •• ._.,,,.,.., G•J1 , ... 01 .. 1 .,..,,.-•,.•• ,,..,.. ,,.,.,.;»_, ••• ,.. • .,, .......... -.. ~.e· 1 .. , ........ '"""' ................. ,. •'••) .... ., .. _,. .. ~-·• .,..,,.,,..,.,, 1 ,. •• .,., ·-c:..r·.c:· .. r • ,..,.,,., o .... •• ~-· o~,. -,, '" ,.1 ._... ... ...,.,,,,. •• ,, ,.. , .;;:-:;. :.:::. : ... ---~::...:·.::::.:.'.: .. ~~.~ ;:.:.::,,,.~ ..f'•••...r-.. • ~ t<.c.r-•· _, .11#'"1'• _.po;.$·•"' ,.,..,...,._,p,.,., ............ a .. ..._.. ......... ,.,.,...,. " .-•1-...... c.·•J~,.,--............... ,. ... ,. -• ..:...·..:, ... ._., ' ••• ,,.,,,, .'. .... _.., ..... ,..,. ......... , -,..,._ •• ---·· •• .r~ ............. , .. ,.., ........... _ -~ ............ ,. .... ·----.. ~ ~ .. Co_ ........... _. ... ~-~·' ... -·. Town s hip Locator Map 2167 Township 6 South Range 98 West 0 Projection: U TM Zone 13 NAD2 7 0 soo 1.000 2.000 l.000 ... 000 1 inch equals 1,500 feet 1:18 ,000 I "'-' -eld County .. .,. ... -...... U e ttlo 1h t l l """.ao-l o: ..... ..,"""'"' C:<a1..:' .,. . .,,",,'""' ti.Aut.f.iOllP'•1toM1>pi121e7 R•'™:ln I 4..f-2008 RE VISI Oll AMIOYll. lltCOAll REY A . OAI( llOISIOllS ., Olstlf\ l llE ,, ()Al( OISC l f\ l llE ,, ()A l( & 01-<J2-<ll ISSUEO fl)! n l EN I REYIU &llCJI. ll(QWll Cll. CIVI L l«tEl!ll E ~tCI R I Cll. PIP l llG El'fUOI. PllO«SS CEii. &llR&llC. 0& I 0C KUC SIAutl!Jbl IH 8 7 6 5 4 HIC!t RIS!S AREAS lOHE A -AREAS fl!H A 1\ ANNUAL CHANCE CJ FLOOOINC ANO A 26' CHANCE Of FLOOOINC OYER A 30·YEAR llME PERIOO. 8CCAUSE DElllLED ANALYSES ARE NOi PERFORMED FOR SUCH AREAS1 NO OEPIHS OR BASE FLOOO ELEVA! IOHS ARE SHOlll fl IH IN IHESE llfES, lONE lE • AREAS WITH A !\ANNUAL CHANCE Of FLOOOINC ANO A 26\ CHANCE Of flOOOlllC OYER A 30-YEAR TIME PERIOO. IN ICJSI INSIANCES• 8ASE FLOOO ELEVATIONS DERIYEO FROll DElllLEO ANALYSES ARE SHOWN Al SELECIEO INIERVALS WITHIN IHESE lQllES , lOHE AH • AREAS lllH A !\ANNUAL CHANCE Of SHALLOW FLOOOINC• USUALLY IN !HE FORll Of A PO(), llTH AN AYERACE OEPIH RANCINC fROll 1 10 3 f[[T, IHESE AREAS HAYE A 26' CHANCE OF FLOOOINC OYER A 30-TEAR l l ME PERIOO. BASE nooo ELEVAllONS OERIYEO FROll OElllLED ANALYSES ARE SHOWN Al SELECTEO INTERVALS WITHIN IHESE ZO'IES lOHE AO -RIVER OR STREAM FLOOO HAZARO AREAS, ANO AREAS lllH A 11 OR CREUER CHANCE Of SHALLOW FLOOOINC EACH Y(AR, USUALLY IN THE FORM Of SHEEI FLOW. fl TH lH AVERAGE DEPTH RlNCING FROll 1 TO 3 FEEi . IHESE AREAS HAYE A 26' CHANCE CJ FLOOOINC OYER A lO·YEAR TIME PERIOO. AYERACE FLOOO OEPTHS OERIYEO FROll DEIAILED ANALYSES ARE SHOfN VllHIN IHESE lOHES, ISSUCO RE Y ()Al( S0£ Pell ~Cl(O I ()Al(I 3 1, !HE INfORMAllCJt PROYIDEO ON !HIS IW' AOOffESSES IHE LACK CJ EXISllNC fLOOOPLAIN INf(Jl!IATION IN A REICHE PO!ll()t CJ CARFIELO CDJNIT, 8ECAUSE CJ IHE PAOXIMllY Of !Oii CREU !HE 1€(0 ro OEICRllllE IH( AREA fLOOOPLAIN us IDENllFIEO EARLY IN !HE PROCAAM, All ANALYSES IERE PERFORl(O USINC ESIA8l ISHCO FEDERAL CNERCENCY IWIACEMENI ACENCY IHMAI PROIOCOLS. 2. !HE PR1. IMINARY flllOOf'LAIN lllAl YSIS [J IOll CRECK USEO LICH! DEl(Cli()t ANO RANCING ILIOARI OUA ANO uses OICIAL (L(VATl()t MOOEL OllA INOICUEO !HE 100-YEAR fLOOOPlAIN l!U.O ArHCI !HE MAJORITY CJ !HE PRCFOSEO rACILIJY , !HIS INFORMA Tl ON PROOUCEO AN IN 111 Al HOOOPLAI N ICJ'llCIW'H IC SUAfACC !HU US ANALYlEO USINC ARCCIS tESRI I ANO HEC RAS 1u.s. ARllY CQlPS [J ENCINEERS. HYOROLOCIC ENCINEERING CENIER IHECI. RIVER ANALYSIS SYSIEM tRASJI S!FllARE. VOL!Jf:IRIC nor D RUES NEEDEO FOR !HE HYOROLOCIC llXIEL IERE CENERllEO USINC INFORMAll()t fROll A RECIONAL SPECIFIC uses fl!ER RESOURCES c INVESllClllCJtS REPO!T iANLYSIS [J THE MACNllUOE ANO FREOUENCY [J fLOOOS IN COLORADO. uses HIER RESQ.llCES INVESTICATIONS REPORI 99-41901. 3. SUllSEOUENI F IELO SURYETS CENERllEO CROSS SECT IONS 11 IH SICNIFICANILY 8ETIER RESOLUTION !HAN THE REllJ1(LY SENSEO I uses OA!l. IHESE CROSS SECIONS IERE USEO 10 CENERAIE A REflNEO OAll SET !HU PROYIOEO 8ETIER OEFINITION [J IHE STREAM CHANNEL ANO SUIROOOING ICfOCRAPHY. !HE HEI IOPO- CRAPHIC OUA llS IHEN RE-ENIEREO INIO THE HCC RAS IQlEL, CENERAllNC A REVISEO FLOOOPUIN !HU IS REPRESENTED ON !HIS IW'. DEIAILS Of IHE IO>El RESULIS ARE PROYIDEO AS PAR T Of IHE ACCOMPANYINC CW IELO C(XJNIY FLOOOPLAIN DEVELOPMENT PERllll APPL ICU ION • . 4, IHE PROJE Cl lON USEO FOR IHIS IW' INCL~S !HE NORIH AMERI CAN DAIUll [J 1983 tSlllE PLAIN CIXJllllNllESl ANO !HE IORLD CEOOEllC SURVEY [J 1984 tSPHERICAL COOROINAIESl . ELEVATIONS ARE BASEO ON IHE NORIH ll(RICAN YERllCAL DUUll CJ 1981. 5 , INFORMATIO'I PROVIDED lllH !HIS IW' USES SIANOARO FEDERAL EMERGENCY IWIACEMENI ACENCY tF(MAl TERlllNOLOCY ANO Cl.ASSIFIClllONS. 8UI IS NOi INIENOCO ID REPRESENI A FLOOO INSURANCE RUE MAP FOR IHIS REllJIE LOCAllON. IHE INIENI CJ THE ANUSIS IAS 10 DEVELOP A ROBUSI DESICN !HU f!U.D PROTECI IHE PROPOSED FACILITY ANO MINIMIZE IHE POTENllAL FOR OOINSIREAM OANAC[, ..L.EWt2.. f'\\\'i OEVEL~O 100 YEAR HOOO PLAN ~ARY I EL 6011. 1 I ElEVAllOH [J fLCIOOPLAIN u CPf l:1 SL~ URS washlngton Division SCALE: l INCH • SO FEEi so· o so· "'''''""I I Mi dContinent / Alosko SBU Ch evr on North Ame ri c a Exp l o rati on a n d P rodu c ti on !OSSO RI~ Ave. -Hcwton. TX 170'2 -1211 I Sl!-3100 PICEANCE BASIN DEVELOPMENT PRE~CONSTAUCT lllf fLOOOPlAfN l IMI rs B A AUISIOI IMIOYAI. RECOAO RE • & . Oa l( ll(VISIOllS I T OISCIP\111€ er Oll( OISC IP\ 111€ er (Ill( & OH12-08 IS~O FOR Cl. IEN T RE VIEW m uE o IACM. II( (II.Ill I CAI. Cl•ll ICIQ.EAll Pll(L lllllllllf [L(Cl~ICAI. PIPlllG C[N, flAAMG. QA I CJ( ll'ftlOltO f CJI CQllS l lUI IOI "' Hf.I( SlllUC IPIAI. ~ I &C 8 7 6 5 ii H!C!! RISI\ &AU lCH &E -&REAS l!IH l 1\ WIUll CH.lllCE 11 FLOOO!NG lNO l 26\ CH&HCE 11 flOOO!NC OVER l )Q-YEAR TIME PERIOO· IN ICJST INSTANCES· BASE FlOOO ELEVATIONS DERIVED FRl)I OETlllEO lllll.YSES ARE SllOIM AT SElECTEO INTERYll.S lllHIN THESE ZCH:S. IQ>!'.Rl!E ID lOJ R!S! A!!U lCH B -&REAS PAOTECTEO FRl)I THE I\ WIUll Cll&llC( fLOOO BE LEV£ES. NO BASE flOOOELEYlTOHS (JI DEPTHS &RE SHOWN llTHIN THIS llH. INSlll&HCE NICH&SE IS NOT R(IXJIR(O IN THESE ZIHS. OAA•lllC STll\IS pjlj)J[CI llQ,1 fl€Y (Ill( $()( 1'€11 n~ QRA-.1 0&1[1 CR 06->0-oe Cl(CIEOI 0&1£1 SC11.E1 AS S110111 3 1, THE INl'Olll&TION PROVIDED OH THIS MAP &OOR(SSES TH[ L&Cl 11 EXIST INC FLOOOPlllN INl'Olll&TIOH IN l R(l()l[ POlllOH 11 ClAf IELO COUNTY. 81:C&USE 11 THE PAOX IMITY 11 1()1 CREU THE HEED TO OETER111HE THE &REA flOOOPl&IN HS IDENTIFIED ElRLT IN THE PAOGAAll. lll AN&LYSES l[R( PERfOIMEO U$ING ESUBLISHEO FEOER&L EMERCENCT Mlll&CEM[NT &CENCY lf[llll Pl!OTOm.s. 2. THE PRL!M!NARY FLOOOPl.llN lNll TSIS 11 TOii CREU USED LICHT DETECTION ANO RANGING !l!OARI OAT& ANO uses OICl&l ELEYATIOH IQ>!'.L O&U INOICUEO THE 100-YEAR FLOOOPl.l!N IOOl..O &HECT THE lllJIJllTY 11 THE PRll'OSEO FACILITY. THIS INl'Olll&TIOH PAOO\ICEO AN INITl&l flOOOPl.llN TCJ>OGA&Pl!IC SURFACE THU HS lNll.YlEO U$!NG &RtC!S IESR!I ANO HEC RAS (u .s. ARNY COIPS 11 ENCIHEERS. HY()R(lOCIC ENCIHEERING CENTER !HECJ. AIYER AN&LYSIS SYSTEM IR&Sll stFTl&R[, 'IQ.~TRIC fLOI RATES HEEOEO FIJI THE HY()R(l.OCIC NOOEL l[R( CEHERUEO U$ING INl'OllllllOH fROll & RECIOH&l SPECIFIC U$CS HIER RESOJRCES INVEST !CUIOHS REPOIT (&NL YSIS 11 TH[ lllGNI TUOE &HO fREOUENCY 11 flOOOS IN CllOR&OO. uses WATER RE5a.RCES llMSTICUIOHS R[P(Jll 99-4190). J, SUBSEOUENT FIELD SLllVEYS CEHERUEO CROSS SECllOHS llTH SICHlflCANTLY BEITER RESllUTIOH THAN THE RENOTELT SENSED I uses om . THESE CROSS SECTOHS ll(R[ USEO TO C[H[RlTE l R[f IHEO O&U SET THU PAOYIDEO 81:TTER OEFINIT!OH 11 THE STREAM CH&HHEL AHO SURROOOING T()'()Cfflf'llY, THE HEI l!J'O· CRAl'HIC OAT& HS THEN RE-ENTERED INTO THE HEC RAS llJOEL• CEHER&TING l REVISED flOOOPL&IN THAT IS REPRESENTED OH THIS ll&P, OEUILS 11 THE IQ>!'.l RE~ TS ARE PROVIDED as PART 11 THE &CC~ANT!NG C&Rf !ELD crurm FLOOOPl.AIN OEYELOPMENT PERMIT lPPl.IC&TION. •· THE PROJECTION U$EO FIJI THIS lllP INCLUDES THE N(Jl!H AMERICAN OUUll 11 1983 ISTllE PLAIN C<XJlOINATESI ANO THE llORLO CEOOETIC SLllYET 11 19U !SPHERIC&L CO!JIOINUESI. ElEYATIONS ARE B&SEO ON THE llOITH AMERICAN YERTIC&l OATUll 11 1988. 5, INFOlll&TION PROVIDED WITH THIS lllP U$ES STANO&RO fEOERll. EMERCENCY lllNlCEMENT &CENCY !f[llll TER111NQ.0CY &HO Cl&SSIF!CUIOHS • BUT IS HOT INIENOEO TO REPRESENT l FLOOO INSUR&HCE RUE lllP FIJI THIS REMOTE LOCUIOH . THE INTENT 11 THE &N&YSIS HS ro OEYELIJ' l ROllUST DESIGN THAT wru.o PROTECT TH[ PROPOSED F&C!LITT &HO MINIMIZE THE POTENTl&l FOi OOINS !REAM OAllACE. &SS'i DEYEL(l>EO 100 YEAR FLOOO PLAN BOUHOART I EL 6011. 11 ELEVATION 11 FLOOOPL&IN u tPf 111 SLOPE Chevron • URS Washington DMslon SC&LE: 1 INCH • SO FEET so · o 5o' 1 •• ,, ...... I I Mi dConti nent I A l aska SBU Ch evron Nor Th America Exp l oration a nd Production CENTRAl PROOUCTION FACILITY PAO POST CONSTUCTION FLOOOPlAIN LIMITS 0 c 8 A Declaration of James Talbot Regarding Chevron U.S.A Inc.'s Ownership of Surface and Minerals in Tracts 103 and 104 located in SW/4 NW/4. Section 36T5 South. Range 98 West. I, James Talbot, declare as follows: I. I am Senior Counsel of Chevron U.S.A. Inc. (Chevron). 2. I made this declaration based on the sources and documents cited herein and if called on to testify regarding Chevron's Specific Use Permit application could and would competently testify as to the information contained in this declaration. 3. Based on my examination of the materials contained in the "Deed" tab of Chevron's Application for a Special Use Permit for a Central Production Facility for natural gas production on portions of Tracts 103 and 104 situated in SW/4 NW/4 of Section 36 and a Title Opinion done for Chevron dated 9/27 /2007 covering the same property, that it is my opinion that Chevron owns one hundred percent ( 100%) of the surface and all minerals in said Tract. 4. Chevron's predecessors in title secured their title by a Warranty Deed recorded in Book 257, Page 137 of County Records of Garfield County, Colorado. 5. That Getty Oil Exploration Company (Getty), owner of the subject property, merged with Chevron U.S.A. Inc. effective May 1, 2002. 6. That as foreign corporations the merger of Chevron and Getty were governed by the laws of Delaware and Pennsylvania and that it is my understanding that Chevron, as the surviving entity holds title under the laws of those states title to all property, including the subject property, that is held in the Deed Records of Garfield County under the Getty Oil Exploration Company name. I declare under penalty of perjury under the laws of the State of Colorado that the foregoing is true and correct. Executed this 13th day of November, 2007, in Houston, Texas. i j" l '\l I "0 jf 1 2 3 4 5 6 7 8 9 25 26 27 28 29 30 31 32 Recept~on No. 175277 Cf.ar-les S. Keegan, Recorder. WARRAN'rY DEED KNOW ALL MEN BY THESE PRESENTS: THAT ~.w;l!lillJOS!tttJ'n! LEONA E. BOSWELL and ERNEST B .• BOS of tho county of Garfield, State of Colorado, for the considorati· of Forty Thousand Dollars ($40,000.00) in hand paid, hereby so~l end convey to PACIFIC WESTERN OIL CORPORATION, a Delaware corpora tion duly authorized to transact intrastate business in the state of colorado, the following described real property situate in the ) county of Garfield, State of r.:olora~o, to-wit: ~'; 1"\' " ¢> ,,,, _,. ~ .,,... I,,. • Tracts 103 and 104, in Township 5 south, ,..,'~-" Rongo 98 Wost of the 6th P. M., and Tract 108< '/' in Township 5 Wost and in Township 6 South, Rllnge 98 Wost of tho 6th p. M., as such Tracts are shown oil Supplemental plat showing Tract Segregations in sections 25, 26, 27, 34, 35 and 36, Independent Resurvey ~ownship, 5 South, Range 98 West of the 6th P. M. Colorado, \ approved by tho office of the u. s. supervisor ,_ of surveys on April 10, 1926, ::l'1 d accepted by the Department of the Interior, General Land Office, ... 'n October 28, 1926; !llP .. that part of Tract 40 in Township 6 south 1 Range 98 west of v" 6th p. M., described under the original survey as tho SE/4 of SW/4 of section 4 and NE/4 of JNl/4 of section 9, in Township 6 south, Range 98 West of 6th p. M. as such Tract is sllown on supplemental Plat Of Tract Segregations in Sections 4, 5, 6, 7, a, 9, 16, 17 and 18, Independent nesurvey Township 6 south, Renge 98 West of the 6th p. M. approved by tho Office of the U. S. supervisor of surveys, on December 19, 1925, and accepted by the Department of the Interior, General Lend Office, on February 27, 1926, . containing 397.40 acres. (Under original_.,tSurveys the above lands are described as SW/4 of Section 33, Township 5 South, Renae 98 \i1est of tho 6th p. M.; !1/2 SVl/4, SW/4 NW/4, SE/4 SW/4, and Lot 4 in section 4, Lot l in section 5 and NE/4 !IVl/4 . in Section 9, Township 6 south, Range 98 Wost of tho 6th p. Mo) Together with all ditch and water rights appurtenant to said lands or used in connection therewith, and especially, but not limited to, tho H. A· Newton Ditch and tho Parkes Ditch, with their respective rights end priori ties; ) Vekiware PAGE 1 'The :first State I, HAAAXET SMITH WINDSOR, SECRETARY OE' STATE OF TIIE: STATE OF DELAWARE, DO HER.EBY CERTIFY THE ATTACHED IS A TRUE ANp CORRECT COPY OF THE CERTIFICATE OF MERGER, WHICH MERGES: "GETTY OIL EXPLOFATION COMPANY", A DELAWARE CORPORATION, WITH AND INTO "CHEVRON U.S.A. INC ." UNDER THE NAME OF "CHEVRON U .S .A. INC .", A CORPORATION ORGANIZED AND EXISTING UNDER THE LAWS OF 'l'HE STATE OF PENNSYLVANIA, AS RECEIVED AND FILED IN THIS OFFICE THR 'l'BIRTIETH DAY OF APRIL, A . D. 2002, AT 9:05 O 'CLOCK A .M. AND I DO HEREBY EORTHER CERTIFY THAT THE EFFECTIVE DATE OF THE AFORESAID CERTIFICATE OF MERGER IS THE FIRST DAY OF MAY, A .D. 2002, AT 2 O'CLOCK P .M. 1111111111111111111111111111 111111111111111111111111111 669 006 02 /22/2005 02 :07P 61664 P367 M ALSOORF 1 of 3 R 16.00 0 0.00 GARFIELD COUNTY CO 0784181 8100M 050107962 Harriet Smi th W in dsor, Secreta ry of StJte AUTHENTICATION: 3674757 DATE : 02-09-05 -\ 1\ ·~ \ 1111111111111111111111111111 111111111111111111111111111 669006 02/22/2005 02:07P B1664 P368 M ALSDORF 2 of 3 R 16.00 D 0.00 GARFIELD COUNTY CO CERTIFICATE OF MERGER OF GEITY OIL EXPLORATION COMPANY WITH AND JNTO CHEVRON U.S.A. INC. lt is hereby cenified 1hat: o.1•n.\..A.:1 u1.· ..,...,~Qn~ S!CllE1ARY OP STA rE DIVISION Olf CORPORATIONS FILED 09:05 AM 04/30/2002 020274446 -0784181 I. The constituent business corporations participating in the merger herein cettified are: (i) Getty Oil Exploralion Company. which is incorporated under the Jaws of the State of Delaware; and (ii) Chevron U.S.A. Inc., which is incorporated under the laws of the State of Pennsylvania. 2. An Agreement of Merger has been approved, adopted, certified, execu1ed and acknowledged by each of the aforesaid constituent corporations in accordance with the provisions of subsection (c) of Section 252 of the General Corporation Law of the State of Delaware, to wit, by Getty Oil Exploration Company in the same manner as is provided in Section 251 of the General Col}lOration Law of the State of Delaware and by Chevron U.S.A. Inc. in accordance with the laws of the State of its incorporation. 3. The name of the surviving corporation in the merger herein certified is Chevron U.S.A. Inc., which will continue its existence as said surviving corporation under the name Chevron U.S.A. Inc. upon the effective date of said merger pursuant to the provisions of the laws of the Slate of i!S incmporation. 4. The certificate of incorporation of Chevron U.S.A. Inc., as now in forte and effect, shall continue to be the ceni!icate of incorporation of said surviving corporation until amended and changed pursuant to the provisions of the laws of the Stale of its incorporation. S. The executed Agreement of Merger between the aforesaid constituent corporations is on file at an office of the aforesaid surviving corporation at: 575 Market Street, San Francisco, CA 94105. I llllll lllll lllllll 111111111111111111111111111111111111 669006 02/22/2005 02:07P 81664 P369 M ALSDORF 3 of 3 R 16.00 D 0.00 GARFIELD COUNTY CO 6. A copy of the aforesaid Agreement of Merger will be furnished by the aforesaid surviving corporation, on request, and without cost, to any stockholder of each of the aforesaid constituent corporations. 7. The aforesaid surviving cotporation does hereby agree that it may he served with process in :he State of Delaware in any proceeding for enforcement of any obligation of Cktty Oil Exploration Company, as well as for enforcement of any obligation of said surviving corporation arising from the merger herein certified, including any suit or other proceeding to enforce the right, if any, of any stockholder of Getty Oil E11ploration Cornplllly w; determined in appr.iisal proceeding' pursuant to the provisions of Section 262 of the General Corporation Law of the State of Delaware; does hereby inevocably appoint the Secretary of State of the State of Delaware as its agent to accept service of process in any such suit or other proceedings; and does hereby specify the following as the address to which a copy of such process shall be mailed by the Secretary of State of the State of Delaware: Corporate Se<.Tetary Department, Chevron U.S.A. Inc., 575 Market, San Francisco, CA 94105. 8. Tho merger is to become effective on May l, 2002, 2:00 P.M., Eastern Standard Time. Dated: May I, 2002 CHEVRON U.S.A. INC. By: /slFmnk G Soler Frank G. Soler Its: Assistant Secretary ·1. y {) JAN 19 1988 Recorded at I vi 1 I ..,·c1ock___J__rw1. .. Reception No. 38~..,JS MILOr.EO ALSDOllF, RECORD GARFIELD COUNTY, COLORADO DEED KNOW ALL MEN BY THESE PRESENTS: That this deed is made effective as of the 31st day of December, 1984 by and between Getty Oil Company, a Delaware corporation,. (hereinafter referred to as "Grantor") and Getty Oil Exploration Company, a Delaware corporation (hereinafter referred to as 11 Grantee 11 ). W I T N E S S E T H: WHEREAS, Grantor is the owner and/or holder of those certain shale oil prop- erties, and lands in Mesa and Garfield Counties, Colorado, described in Exhibits 11 A11 and 11 811 attached hereto and by this reference made a part hereof I (hereinafter collectively referred to as the 11 Properties 11 ); and NOW THEREFORE, for and in consideration of one dollar and other good and valuable considerations, the receipt of which is hereby acknowledged, Grantor does hereby quitclaim, bargain, sell and convey unto Grantee, all of Grantor's right, title and interest in and to the Properties, together 'lith all improvements situated thereon arid all water rights. permits and applications, and reservoir and ditch rights, appertaining or belonging thereto or used in connection therewith, and other appurtenances thereunto belonging. Grantee does hereby accept this deed subject to easements, rights of ways, exceptions and any and all reservations appearing of record affecting any of the Properties and/or rights granted, To have and to hold the same together with all and singular the appurtenances thereunto belonging or in anywise appertaining to Grantee, and all the estate, right, title, claim and demand whatsoever, of the Grantor, either in law or equity, of, in and to the Properties, together with all improvements situated thereon and all water rights, permits and applications, and reservoir and ditch rights, appertaining or belonging thereto or used in connection therewith, and other appurtenances thereunto belonging. This deed shall extend to, be binding upon, and inure to the benefit of the successors, and assigns of Grantee. By: STATE OF COLORADO CITY ANO COUNTY OF DENVER The foregoing 1nstru~t was,1~nowledged before me this ){f-f,. day of ""~~~~'-::,.· 19E6, by .E, ~µ. , to be kn'iiWnto be the executed the fiegoing instrument as Vice President of Getty Oil Notary ~ublic: !0 JU f~ My Comiss1on Expires: ~~,.,.,~,,".,.-,__,,,•.,S.,..,..,,"""..,---- Address: llfJJ£ofJeo/gi:toiOt:' -:·-:·-·;-· .'·0g\,.\"'.: The foregoing instrument was acknowledged before me this ~ day of ~;... , 1987, by ·JI. F. ;.{;>:-,,,= , to be known to be the "PerSOilWl1aexecuted the foregoingtnffiilment as Attorney-in-Fact of Getty Oil Exploration Company. Witness my hand and official seal. "···. Address: r STATE OF COLORJ!.DO County of Garfield !, Mildred Alsdorf, County Clerk and Recorder in and for said County, in the State aforesaid, do hereby certify that the foregoing is a full, true and correct copy of a Oni t Claim x>K Deecl recorded 05/11/1988 in Book 734 ~t l'~ge 1 07 as ~R""e"-c-"e'ip,,_t.....,.j uo~n.__,fi,_3,_9,,_,__1"'9""'2-'2.__ _____ .as1he same appears upon the records of my office. Given under my hand and official seal this 8th day o{ ---~N~o~v~erober , A.D.2 0 0 ,5_, _2..:_42_o'clock )L_M ~rvf.fud({~ Deputy County Clerk nnd Recorder ~: ,. ~. , . ;.:_. ' '·· , !'.)ARflELD S MAY 11 1988 Info D¢j;, Foo QUIT Cl.AlH OHO $_--Y£ TlllS D~:El>, Kade <lf[<'ctivo .1!: of ch<1 lst doy of Januin:y in th(: yonr of out· Lord onn thousand nino hundred and cli&hty fi'IEl (1985) bctve(ln T~)(neo Proclur.ing Inc., 11 Dcil,'11'..'.'.H."Q co1·pori1tlon •. of the City and County of Denver 4nd Stilto of·.COlor.:ido, p<'lrty o( the first; pat"t, nnd (Jetty 01.1 Explot:Ation Compn.ny, n_·::_Dol."ll.'.:lre c:oJ'po;it';ttion, o{ Bo~ SS.68 .TA, DnnVlll', CO BOll7, j)llt'ty of the sccc:ind 'Pnf·t. \;i i.:n.•sseth, Thnt t.hc .st1id .:party of: the first part:. for nnd ill consfdcnition _of tho SLA!ll of one doll<!!: ,ilild .othot good and V<1ll1able .consideri1tion to -the _siild p.:irty of r.:hc fir:<t: pari>.in h.:iud pnid byt.lic .said parcy Of th(!; sccoi1d -.p.irt, .tho rcc;Q).pl . ..:hcrr.of. i:; hci·Cby ·confc'Ss~d .and acknoi.>lc_dgcd, hn~ rorniAod, rolo.1S"ed, conveyed .. ina:.Qu1r:·.tLA'IMED, :·llnd;·h)' thos"G_· pLesonts does i:Cniise, rclri:i·s•c, .convay r.nd qUrr ~ CL\iM · ~i:iril:a,r$,1i.d:~·p·lirtV":."of tlHi:··_snctmd ·.p.irt, its·-1:ucccsso1"s nnd--_a·Ssigns forcvt1r, _~ll .tH.o. ;riih't-~·:-:·t:itlC·~.':interci(t·\ ·:-c:lniie. ·an·d ·dCmmid ~hi ch .the" :sui-d· pnrty of the fi-t·sc;.pS.it."':haS-:'iTI nnd to the folloving describ"eii:".l"~ud$ situ.1i;c., lying and h~ing in "tli~-COllnt);. of G;irfield 11nd Statfl of ColorndO:~ descrihed iri·F.:-xhi.bit "A~, ."Jttnehcd ;lmi'C:to m1d ltllda a spcci~ic p.irt hecco[. TO HAVE ANO. TO llOLD t~1c st1D1c, tot;c.ther vith all .find sin&ul;n: the. ;ipp~1rtcn:itfccs· "nTid privllcr.cs thereunto bolonging_ or il1: ·a1iyYise there-unto ;1ppcrt:ii:"ii'r.r,, -and ;ill ::he· estate, i:.isht, title, intl!i:rl,'!.<:t ;nid-',Cl.nl:iz wh-.itsoevcr, of the ·sn'id .. Prii:ty of tho fit$C.:_P~l."t-,· ... cither in laY or o'qUity, to .the. 011ly pro;Xlr ._\i"se-:-.::lnd -:bcnl':fit of the· .S".:iii't;:p«ir.t)'"'·o("thc s<'!co1\d pt11·t{: .. itS suecnS·tors .1nd :tr;;.<>ir,ri!f, f:oi."C.\•c'-i·, . .. . . . . . , rf~·;~i~~iSS \JllEREOF, 7he·.~~S:,',·v·~~·.·.-~-~.~-·, .• ~-,~,t~~~.i~·:·,'·,··.•.:.·: ... '.·.·.~c f.i.r.st: p.1i:1.: hos hcrcun::o .'~"~'( i. ts h;U\d th(;.·_:;·~ay':::~rid yr .• it' tit'i;;t '"' ., w.__ ... ::."; ~· . -·:.::, ._;:"::.-:·:.~:x·:"-:· ._ ... ; ..... ;_ ·.B)': STA'i"£ OF COt.ORADO CITY ANI> COUN'fY OF DEN\!ER) D. P, Loughry, . Atto:rn<'!y·in-; ""act r: ; / ... -fl. ... ~., /; ' . f { I, The fo::.:igoing inscrur:ient: w.1s · -iCkh~l'~dge'd bof6re Ille this ,~,~-f d;;y ~1.1)' l\.D·. T988, by D. P. l.oughry', iA.t'iOr:ney'}filfF'act for-Tcxr.cc;i Proc!uc.ine, ._lnc. \..~i::n.:is's'·~rnY·:h.ind .and offi·cf.al seal'. '·· of .. ·•i,;, '··· . : :.:·: .. · --. . ..... ;.:_:i~~·i~·rf l\ib lie: I ;.r.r:~ ... 1 ..• J~ ·.~· ·.:-_ " ~.:. , ), (• '· ~· .. " -- T5S-R98W Si: ct ion 25: C.r.rficld Coun t y , CO Clear Cree k llo. 4 Pl ace1·, being Lots ti1ree (3) .ir1d four (4); ~:Ith Lot 3 tka 8.04 a c r es being the SE/411£/4 SH/4 .:in d lot 4 aka 16.~: a c res being the E/2SE /4SW/4 ; Section 25 : Sect ion 36 : '"),;•11 . ., Velvet No 13 Pl acer Claim cc.1Pp rislng Lots one( I} and t1·10 (2); ~1Hh Lot 1 aka 20.47 acres be!r.g the 11/2 NE/4SW/4 and Lot 2 ~ka 20 . 58 acres being t he N/2 NW/4SW/4; Cl ear Creek !le , 3 Placer Mining Clai n1, desc ribed ts the Tract or.e hundred one (JOI), aka the Sl1/4t1£iQSl~/4, S/211~:/45}1/4 , SW/4S'.·l/4 .ind W/ 2SE/ 4S~I/ 4. Lucky Strike llo, 15 Oil Shale Pla cer /·lini ng Cla i m, comprising Lot on e (1), wi t h Lot l aka 29 .3(' deres b!!ing the tl/Zt;£/4NE/t. ond NE/411\.l/4NE/4; Cl ea r Cr eek Ho . 3 Pl a cer ·Mining Clai m, desc rit:ed as t hat part of Trar.t ... one hund red cne ·001) lyin g i•1 'he SF./4tlf /d$E/4 an.d £1?.St/·fSE/4; Velvet No. lJ Placer Cl ai m, com prising lot thrcu (3), ata t~e 1 6 :~4 ac re; be ing the SE /4SE/4NE/4 and NE/4NE/4SE/4; '.V'i!lvet No. 14 Placer Cl aim, compr i sing Lot tt10 (2), aka i6 .64 acres being the llE/4SE/4tlE/4 and SE/4NE/4NE/4; Lucky Strike No. l Placer Hin1ng Claim, co1rµri s1n 9 Tract 97, d ka Sll/4NE/41i E/4, SE/4NW/4NE/4, W/2SE/4NE/4, E/2Sl.'/411Ei4 , E /2~M /4SE/4, \.l/2NE/4SE /4, E/2SW/4SE/4 and W/2 SE/4SE/4: l ucky Strike llo. 2 Pl acer Mining Claim, cornpr f5in 9 Tract 96 , aka W/21Hl/4NE/4, W/2Sll/4NE/4, E/2NE/41111/4, E/2 SE/4tl l{/4 , E /21lt/4S W/~, "1/2NW/4SE/ 4, NE/4SE/4Sl~/4 and NW/4SW/4SE /4; Lucky Strike No. 3 Placer Mining Claim, comprising Tract 95 , aka W/2NE/4NW/4, E/2NW/41il.'/4, W/~SE/4 Nh'/4, £/2Sl1/ti~::·i/4, llE/~iil1'/4SW/4 and Nl//411E/4SW/4 . Luc ky Strike No . 1 Placer ,l'ii ning Claim , compr i sing Tra ct 9i , lying in the NW/4NE/411E/4, H/2flE/41iE/4NE/4 and E/2 NE/41'1 11/4NE /4 ; Cl ear Creek !lo. J Pl acer Minin g Clai m, descri b~d a~ the Tr act one hundred one (101) ckil that part of t he llf/411(/4, Leing the E/211 E/4NE/4NE/4; ·Tract 103 aka the E/2E/2NE/4, E/21'1E/4SE/4 ~nd E/2 E/::S E/4NE/fiSE /4 , as described in Warranty Dee d recorded in Bool: ?.57 pag e 137 of thP. County Records of Gar fi e ld Co unt y , Co l orado . Cl ear Creek flo. 3 Placer Mlni ng Cla i m, dcsc r iblll ~s Tract one hundred-one (101) aka the N/2Nl4/4NW/d, llW/4NE/41il</4 and 'rl/2W/2 UE/4 1<E/ 41i1'1/4 ; Tr a ct 103 , akil the S/2NW /4N W/4, SW/4NE/t.N'ri/4 , !~/2Sf/~NE/4N\'lf4 N/2S W/4Nh'/4 , S>l/4SW/4NW/4, ~!/2W/2SE/~SW//illl~/4, illl/4Sf/'lm1/ 4, W/2W/21lE/4SE/ 411W/4, W/2NW/4SW/4 , SE/4illl /4SW/4 , l·l/2W/2 11E/4~W/4Sl~/4, S~/4 11E /4SW/4 , SE/4NE/4SW/4 le ss lot 9 in t he E/£E/2E/2SE/~.'iE/4S\//4 , a lso described in the Wa r ranty Deed recorded fn 6i:;ok 257', page 137 :of County Recoras of Garfie l d Cou nt y, Colorcdo; ··T'ract 104, aka the 40 acres of the E/2SE/4~lU4t;\.l/4 , "E/2fl/2SE/ 4SW/ 4/IW/ 4, E/ 21>1/211E/ 411\U 4SW/ 4, E/2/IE / 4N!·I/ 451-1/ 4, · .. ~·: ·S ~l/4SE/4NW/4, N1"/4NE/4SW/4 , W/211/2NE/i:tlE'/4SW/4 , ll'nl-1!2SE/'iS £/tll'il/4 , · ·also desc r ibed In War ranty Oeed recor<lc:d in Book 25i , p~g1: 137 of -co unt y Records of Garfie l d Coun ty, Colorado; Tract 106, aka the ll/2S2/4SW/4, E /2E/2 11Ei4Sll/4S l~/4 , " ... · .. E/2f/2SE/4SW/4Sll/4, and the E/2SE/4Sk'/4, less Lot ~, and clny pil rt : ... in the S/2 S/2Sl~/4S£/4, also described in Warranty Ueed reco rde'd i n :; . Book 257 , page 137 of the County Recor ds of Gal'fi<?l d Co unty, . · -;:._colora<10; · August 29, 2007 Mr. Fre d Jarman, Director Garfield County Building & Plmming Department I 08 8111 Street, Suite 401 Glenwood Springs, CO 81601 Re: Authorization to Represent Chevron - James S. Talbot Senior Counsel Sally Cuffin, Washington Group Internati onal Inc. Dear Mr. Bean: Law Department North America Exploration and Production Company 11111 S . Wilcrest #N2006 Houston, Texas 77099-4397 Tel 281-561·3536 Fax 281-561-3515 jtalbot @chevron.com Chevron U.S.A. Inc. (Chevron) has retained the services of Sally Cufftn of the Washington Group International Inc .. Ms. Cuffin will represent Chevron in facility permitting for our Piceance Project in Garfield County, a role in which she will prepare and submit Special Use Permit Applications, ISDS, building, grading, pipeline, road crossing and other routine construction related applications and information on behalf of Chevron. Ms. Cuffin is also authorized to participate in discussions before appointed and elected boards regarding the various applications, however at such meetings, her a uthority to legally bind Chevron is limited to the tenns set fo11h in the Permit Applications or other written documents filed on our behalf. Sincerely, cc; Nicole Jolmson Timothy Barrett Sally Cuffin PICEANCE BASIN NATURAL GAS DEVELOPMENT PROJECT Project Number: 29454-000 Study Number: PBSR-59836AVF-CIV-RPT-URS-00000-00001-00 FLOODPLAIN STUDY FOR CENTRAL PRODUCTION FACILITY AT TOM CREEK PREPARED FOR Chevron • Chevron North America Exploration and Production Prepared By: URS Washington Division 7800 East Union Avenue, Suite 100 Denver, Colorado 80237 Revision: C Status: Issued for Approval Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) STUDY REVISION PAGE Project Name: PICEANCE BAS IN GAS Di scipli ne: Civil DEVELOPMENT PROJECT Client: CHEVRON NORTH AMERICA Proje ct Number: 29454-000 EXPLORATION AND PRODUCTION Revision Signatures Prepared by Date Approved by Issue Date Gary N. Martin 4/23/2008 Checked by Date Approved by Date Douglas Weber 4/24/2008 Status Rev . Date Prepared Pages Description of Changes No . By IFA A 17 Dec GNM ALL Issued for Approval 2007 IFA B 25 Feb GNM ALL Issued for Approval 2008 ) IFA c 23 Apr GNM ALL Issued for Approval 2008 RSwashington Division 29454-000 ii Rev.C Chevron ) 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY TABLE OF CONTENTS EXECUTIVE SUMMARY ...................................................................................................... 1-1 I. INTRODUCTION ............................................................................................................ 1-1 A. PROJECT LOCATION AND GENERAL INFORMATION ......................................................... 1-2 B. NATURE AND PURPOS E OF THE FLOODP LAIN STUD Y ..................................................... 1-2 II. HYDROLOGIC AND HYDRAULIC EVALUATION ........................................................ 11-2 A. HYDROLOGIC ANALYSES METHOD ............................................................................... 11-2 B. HYDRAULI C ANALYSES METHODOLOGY ....................................................................... 11-3 Ill. SUMMARY ................................................................................................................... 111-4 IV. CONCLUSION ............................................................................................................. IV-6 V. APPENDIX ........................................................................................................................ 7 A. 100-YEAR FLOODPLAIN VICINITY MAP OF TOM CREEK ...................................... 8 B. 100-YEAR FLOODPLAIN MAP OF CENTRAL PRODUCTION FACLITY ................ 10 C. TOM CREEK DEVELOPED 100-YEAR FLOODPLAIN CROSS SECTIONS .......... 12 D. TOM CREEK EXISTING 100-YEAR FLOODPLAIN CROSS SECTIONS ................ 51 E ROAN CREEK & TOM CREEK FLOODPLAIN HYDROLOGY ANALYSES ............. 92 F. TOM CREEK FLOODPLAIN HEC-RAS OUTPUT .................................................... 95 1. TABLE NO. 1 HEC-RAS OUTPUT -EXISTING CONDITION ............................. 96 2 . TABLE N0.1 HEC-RAS OUTPUT-DEVELOPED CONDITION ......................... 97 tJRSwashmgton Division 29454-000 iii Rev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Executive Summary Within the Piceance Basin Gas Development Project, a Central Production Facil ity (CPF) will be constructed . The site selected for CPF is located on an alluvial fan adjacent to Tom Creek. The proposed grading plan for the CPF requires t he construction of two (2) pads to raise the future building elevations above the 100-year floodplain limits. The purpose of this study is to determine the limits of the100-year floodplain and to address the conveyance of the runoff from the Tom Creek Basin through the new (CPF) site adjacent to Tom Creek. The topographic information used to develop the proposed grading plan and extraction of the HEC-RAS cross sections were based on topographic mapping supplemented by field survey data. The results of the analyses contained in this study shows that the new CPF s ite construction pads and future buildings will be protected from flooding by constructing a new berm along the southeasterly edge of the development site and replacing the existing 60-inch diameter CMP culvert under Clear Creek Road with a new 12' x 5' reinforced concrete box culvert . The new culvert is designed to convey the 100-year storm event without flooding the development site or overtopping Clear Creek Road. I. Introduction This report describes the URS, Washington Division floodplain analyses of po rt ions of Tom Creek a tributary of Clear Creek I Roan Creek with in Garfie ld County, Colorado. The topography information used to determine the drainage basin si ze s and th e amount of run-off determined in these analyses is based on both the U.S . Geolog ica l Survey (USGS) 30-meter digital elevation model (DEM ) downloaded from the USGS website and LIDAR data. The original LIDAR data was re-sampl ed at nine-foot intervals to create a new DEM. The computer software used includes ArcGIS by ESRI, and HEC-RAS by the U .S. Army Corps of Eng ineers. The existing 100-year floodplain for Tom Creek was analyzed (see "V. Appendix , C. Tom Creek Pre - developed 100-Year Floodplain Cross Sections") and shows the cros s sections taken for purposes of determining th e limits of the floodplain prior to development. Field survey data for Tom Creek and CPF site was used to determine ex isting ground elevations. The Tom Creek portion of the survey w as done by cross se ctioral method beginning at the center lin e of Clear Creek (the existing discharge point of Tom Creek). 29454-00 0 1 of 100 Rev.C Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY A. Project Location and General Information The project consists of grading two (2) pads for the construction of a new Central Production Facility located on an alluvial fan immediately northeasterly of Clear Creek Road (see "V Appendix A, 100-YEAR FLOODPLAIN VICINITY MAP OF TOM CREEK"). See "V. Appendix, A. Floodplain Map". Tom Creek discharges into easterly bank of Clear Creek. Clear Creek then discharges into Roan Creek . B . Nature and Purpose of the Floodplain Study The purpose of this Floodplain Study is to address the conveyance of the runoff from the Tom Creek Basin through the new Central Production Facility (CPF) site adjacent to Tom Creek. The impact of the 100-year flood along Tom Creek was determined and construction items (berming and culvert replacement) were designed to protect the CPF from inundation by the 100-year floodplain. II. Hydrologic and Hydraulic Evaluation A. Hydrologic Analyses Method The hydrology is based on the regional regression equations published in the USGS Water Resources Investigations Report 99-4190 (WRI Report) entitled "Analysis of the Magnitude and Frequency of Floods in Colorado" and drainage areas defined based on the USGS DEM . The Roan Creek drainage area to the southern county boundary was defined. The drainage area was further subdivided to define the major tributaries and sub-basins within the tributaries. The WRI Report divides Colorado into five regions, and presents the regional flood regression equations for the 2-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year floods. Roan Creek is in the Northwest Region. The analysis for the Northwest Region includes a stream gage on Roan Creek with 17 years of record . The WRI Report determined the 100-year peak discharge equation for the Northwest Region as: 0 100 =104.7A0·624 Where : 0 100 =the 100-year peak discharge in cubic feet per second (cfs), and A = the drainage area in square miles. U'RSwashington Division 29454-000 2 of 100 Re v .C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY See "V. Appendix, E. Roan Creek & Tom Creek Floodplain Hydrology Analyses" for the hydrology calculations for the Roan Creek Basin and its' tributaries including Tom Creek. The 100-year flood peak flow for this portion of Tom Creek is estimated to be 505 c.f.s. 8. Hydraulic Analyses Methodology The floodplain analyses were performed using the HEC-RAS (Version 3.1.0) program for the existing or pre-developed condition and the post-developed condition . The geometric input data (existing stream cross-sections and lengths) were determined by field survey data consisting of cross section shots taken along the centerline of the creek 200 feet each side of the centerline. Additional ground survey shots were taken on a 10 foot grid within the development area for the future construction of the Central Production Facility. Field survey of a portion of Clear Creek Road and the existing culvert was also provided . Manning's n-values used vary from 0 .04 to 0.05 for the channel, and 0.055 to 0.06 for the overbanks. Manning's n-values of 0.04 and 0.055 for the channel and over banks, respectively, are consistent with those detailed for Roan Creek in the Mesa County Flood Insurance Study. The floodplains were initially defined by HEC-RAS, and then refined based on engineering experience. The proposed grading was then added to the mapping to produce the new cross sections showing the location of the two new Central Production Facility Pads for purposes of showing the impact on the existing floodplain. An existing 60-inch diameter CMP culvert collects the Tom Creek flows at a point immediately northeast of Clear Creek Road that is located south and east of the CPF site . This culvert conveys a portion of the 100-year storm event under the road (approximately 122 cfs of the 505 cfs required discharge). Flows in excess of the 122 cfs capacity overtop an existing berm located along the northerly side of Tom Creek overbank area and allows an increase in the ponding depth that result in the 122 cfs capacity of the culvert . When ponding overtops the berm approximately 383 cfs continues northwesterly overland to a low point in the site and on Clear Creek Road that is a low-water crossing for major storm events. Once the flows overtop Clear Creek Road , they continue overland (approximately 600 feet) to a discharge point into Clear Creek . Culvert and road over-topping analyses were used to develop a rating curve to determine the capacity of the culvert (see Appendix C and D for the Culvert Master© culvert analyses). The analysis shows the amount of flow both through the culvert and the by-pass flows overtopping Clear Creak Road. 29454-000 3 of 100 Rev. C Chevron -CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Additional cross section from station 8+50 to 25+00 were also included the analyses to determine the floodplain limits_ of Tom Creek to a low water crossing at station 25+00. Due to the development of the CPF site, the above mentioned existing 60-inch CMP will be replaced with a 12' wide x 5' high reinforced concrete bo x culvert. Additional flood protection for the site will include constructing a new continuous berm along the southeasterly edge of the site CPF pads. The berm is designed with riprap revetment to protect to prevent erosion during major Tom Creek Flows. Ill. SUMMARY Table 111-1 presented below summarizes the results of the hydrologic analyses performed on Tom Creek and the Central Production Facility project site . See "Appendix V, A. Floodplain Map" for the location of the cross section stations taken along the centerline of Tom Creek in the area of the CPF improvements , the existing and proposed grading of the CPF site. Appendix "V, C. Tom Creek Developed 100-Year Floodplain Cross Sections" shows the cross section at each station listed in Table 111-1 below. Table 111-1 also shows the 100-year water surface elevation for both the post-developed and the existing cond ition and the difference between the two water surface elevations . Station cross sections shown in bold represent the cross sections with in the development site. Stations 0+00 through 7 +87 represent the existing downstream cross sections for the discharge point of Tom Creek at the center line of Clear Creek. Cross section stations 8+30 through 34+80 represent the existing cross sections above the CPF site are also included in the analyses to determine the floodplain limits of Tom Creek to a low water crossing at staion 25+00. 29454-000 4 of 100 Rev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY TABLE 111-1 Central Production Facility Summary of the HEC-RAS Hydrologic Analyses and Impact on Tom Creek Min Post-Dev Exist Post-Dev Dev. Dev. Dev. Dev. River Q-100 Channel Water Water W.S.EI. Channel Flow Top Channel Station Year Elevation Surface Surface Minus Velocity Area Width Froude Storm (ft) Elevation Elevation Exist (ft/s) (sq ft) (ft) Number (ft) (ft) W.S.EI. 0+00.00 505 5974.00 5983.00 5983.00 0 .00 0.50 0 .50 1449.38 225.00 0+30.00 505 5974.20 5982 .99 5982.99 0 .00 1.20 1 .20 562.57 148.75 0+87.00 505 5978.22 5984 .85 5984.85 0 .00 5 .76 5 .76 168.68 225.00 1+40 .00 505 5979.77 5986.24 5986.24 0.00 5.70 5 .70 118.51 198.75 2+99.00 505 5984.90 5989.29 5989.29 0.00 6 .7 9 6.79 106.90 93.26 3+59 .00 505 5986.39 5989.98 5989.98 0 .00 6 .65 6.65 78.42 54.06 4+48.00 505 5988.5 1 5992.79 5992.79 0.00 7.96 7.96 63.46 33.18 5+86 .00 505 5991 .78 5995.48 5995.48 0 .00 8 .47 8 .47 59.60 27.21 7+52 .00 505 5995.33 5999 .67 5999.67 0 .00 8 .77 8 .77 57.55 24.42 7+87.00 505 5997.00 6000 .85 6000.85 0 .00 5.2 1 5 .2 1 96.84 35.13 8+34.00 505 5999.00 6001.69 6002.28 -0.59 8.26 8.26 68.59 40.14 8+56.00 505 5999.50 6002.60 6004.04 -1.44 8.48 8.48 60.17 28.68 8+65.00 505 5999.50 6003.29 6003.97 -0.68 11.09 11.09 45.53 12.00 9+29.90 505 Replace 60" CMP Culvert with 12'x 5' RC BOX Culvert ) 9+30.00 505 6000.00 6005.85 6009.88 -4.03 7.19 7.19 70.21 12.00 9+40.00 505 6006.00 6007.83 6010.84 -3.01 7.32 7.32 69.00 41.74 9+65.00 505 6006.00 6008.38 6010.85 -2 .47 7 .69 7.69 65.94 37.80 10+15.00 505 6008.00 6009.92 6010.86 -0.94 4.39 4.39 117.40 105.02 10+82.00 505 6008.50 6011.68 6011.63 0.05 6.77 6.77 132.38 132.87 12+79.00 505 6013.70 6016.79 6016.77 0.02 7 .95 7.95 63.49 32.73 14+25.00 505 6020.80 6023.14 6023.11 0.03 6.55 6.55 94.01 81.42 15+41 .00 505 6021.50 6025.70 6025.76 -0.06 8 .09 8 .09 69.32 47.15 16+56.00 505 6026.33 6029.68 6029.47 0.21 7.51 7.51 72.26 51.31 17+52.00 505 6028.16 6032.47 6032.31 0.16 8 .83 8 .85 57.05 23.92 18+30 .00 505 6031 .10 6036.08 6036.09 ·0.01 9.78 9 .80 51.54 17.45 18+80.00 505 6032.13 6037.57 6037.57 0.00 6.58 6 .58 76.81 23.06 19+80.00 505 6033.47 6038.37 6038.37 0.00 6 .56 6 .56 76 .99 27.30 20+80.00 505 6035.44 6039.66 6039.67 -0 .01 9.26 9 .27 54.46 20.68 21+80.00 505 6038.08 6041 .67 6041 .67 0.00 5.60 5 .60 90.22 34.54 23+80.00 505 6047.17 6050.98 6050.98 0 .00 8.51 8 .5 1 59.36 27.76 25+80.00 505 6057.65 6061 .58 6061 .5 8 0 .00 7.10 7 .10 130.16 128.69 27+80.00 505 6062 .56 6067.49 6067.49 0 .00 8.98 8 .98 56.23 31 .04 29+80.00 505 6070.22 6074.21 6074 .21 0 .00 8.39 8 .39 60.21 28.05 31+80.00 505 6084.24 6090.16 6090.16 0 .00 9.79 9 .79 51.58 17.44 33+80.00 505 6096.80 6100.59 6100.59 0.00 8.25 8.25 61.18 29.57 34+80.00 505 6102.80 6107.01 6107 .01 0 .00 8.41 8.41 60.15 30.17 Source: HEC-RAS Version 3 .1.0 URSwashington Division 29454-000 5 of 100 Rev.C ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY IV. CONCLUSION In conclusion , Table 111-1 (above) and the floodplain cross sections found in Appendix V shows that the new CPF site construction pads will be protected by a continuous berm located along the southeasterly edge of the development area . Th is berm will seNe to protect the site from inundation during the 1 GO.year storm event. An existing 60 -inch CMP culvert (located in Tom Creek and running under C lear Creek Road) will be replaced by a new 12-foot wide by 5-foot high reinforced concrete box culvert. The new culvert has been designed to convey the 100-year storm (505 cfs). This will result in safely passing the flows from 100-year storm event without over-topping Clear Creek Road . The new culvert will lower the existing water surface elevation significantly (see Stations 8+34 through 17+52, Table 111-1 above ) over the existing site conditions. Under the existing culvert condition culvert flows in excess of the culverts capacity would flow over Clear Creek Road and would flood the development site in the process . Rip-rap will be placed in re-graded channel sections of Tom Creek and will provide erosion control protection at the upstream and downstream ends of the new box culvert. An improved entrance to the new box culvert eliminates road overflow and reduces the flow depth adjacent to the CPF pads. Analyses of the downstream cross sections of Tom Creek shows that the 100-year flows from the new box culvert will remain in the existing stream banks with no adverse impact over the existing flow condition. 29454-000 6 of 100 R ev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) V. Appendix URSwashington Division 29454-000 7 of 100 Rev. C Chevron ) Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) A. 100-YEAR FLOODPLAIN VICINITY MAP OF TOM CREEK tJRSwashington Division 29454-000 8of100 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) ) DSwashington Division 29454-000 9 of 100 Rev.C Chevron ) === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) B. 100-YEAR FLOODPLAIN MAP OF CENTRAL PRODUCTION FACLITY 'URSwashington Division 29454·000 10of100 Rev. C Chevron 1111 29454-000 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY 11 of 100 TOM CREEK FLOODPLAIN MAP -~- 75 25 ,__ __ 100 50 SCALE IN FEET 100 / NEW 100-YEAR FLOODPLAIN , LIMITS NOTE: SEE ATTACH EO CROSS SECTIONS FOR LI MITS OF THE EXISTING & OEVELOPEO 100-YEllR FLOOO PtAIN LIMITS LEGEND 6C'~--EXISTING CON TOU R --so10-PROPOSED CONTOUR Rev . C ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY c. TOM CREEK DEVELOPED 100-YEAR FLOODPLAIN CROSS SECTIONS DSwashington Division 29454-000 12 of 100 Rev. C Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Solve For: Headwater Elevat ion Culvert Analysis Report For The Developed Condition For A New 12'x5' Box Culvert Under Clear Creek Road At Central Production Facilit~ Solve For: Headwater Elevation Culvert Summary Allowable HW Elevation Computed Headwater Elevation Inlet Control HW Elev. Outlet Control HW Elev . Grades Upstream Invert Length Hydraulic Profile Profile Slope Type Flow Regime Velocity Down stream Section Section Shape Section Material Section Size Number Sections Outlet Control Pro~erties Outlet Control HW Elev. Ke Inlet Control Properties Inlet Control HW Elev. Inlet Type K M c y 6,009.00 ft 6,006.53 ft 6,006.50 ft 6,006.53 ft 6,000.00 ft 78.00 ft S1 Steep Subcritical 8.42 ft/s Box Concrete 12 x5ft 1 6,006 .53 ft 0.50 6,006.50 ft 30 to 75 ° wingwall flares 0.02600 1.00000 0.03470 0.86000 URSwashinqton Division 29454-000 He adwater Depth/Height Discharge Tailwater Elevation Control Type Downstream Invert Constructed Slope Depth, Downstream Normal Depth Critical Depth Critical Slope Manning's Coefficient Span Ri se Upstream Velocity H ead Entrance Loss Flow Control Area Full HOS 5 Chart HOS 5 Scale Equation Form 13 of 100 1.31 505.00 cf s 6,004.50 ft Outlet Control 5,999.50 ft 0.6410 % 5.00 ft 3.38 ft 3.80 ft 0.4599 % O.Q16 12.00 ft 5.00 ft 1.41 ft 0.70 ft Transition 60.0 ft2 8 ) ) Rev.C ) Ch evron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 0+00 at C.L. of Clear Creek Based on Field Survey Data ----.055----+<----.04 ---r-------.055 ------5984 +--------------'---------------~---. ~Le-g-en_d_ 5980 g c 0 ~ ~ UJ 5978 5976 50 100 tJRSwashington Division 29454-000 150 200 Station (ft) 14 of 100 250 WS 100-YR ----Ground • Bank Sta Rev. C Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 0+30 at Easterly Edge of Clear Creek Based on Field Survey Data ,. ___ .055 J._ .o4 1 .055 ----------4< 5986-1-----------1----"-----------------"--~ ~Le-ge-n__,.d -, WS 100-YR g c 0 5984 - 5982 ·~ 5980 a; Ui 5978 5976 50 'lJRSwashington Division 29454-000 100 150 200 Station (ft) 15 of 100 1 250 Grou nd • Bank Sta Rev.C ) Chevron ) Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 0+87.00 Edge of Clear Creek 100-yr Floodpl ain B ased on Fi eld Survey Data 598 5 1<---.055 ----.--.04 -~1 -------.055 -------->1 L egend WS 100-YR Ground • Bank Sta 5984 · 5983 5982 g c: 0 ~ a; iii 598 1· 5980 5979 5975 1--...,......-,_--,.~,---.---.-_..,.-,--_,_-,.._..,._..,._-.--,..~_..,...---.--.---.~..---.--.-_..,._..,.,___,, 0 50 100 150 200 250 Station{ft) URSwashington Division 29454-000 16 of 100 Rev. C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 1 +40.00 Based on Fi eld Survey Data 1<---.055 ---""<---.04 ----*1<------.055 -------->l 5987 +---------'----------'--------------'--~ ~L-eg_e_n ~d ~ g c 0 ~ 5983 ~ w 5982 5981 5980 WS 100-YR -·-Ground • Bank Sta 5979 .J---.--.---..--------.......------.-..--------.-..---.-----..-....I, 200 2 50 0 50 100 150 Station (ft) tJRSwashington Division 29454-000 17 of 100 Rev.C ) ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 2+99.00 Ba se d on Fie ld Survey Data 1<----.055 -------.04 -.1.------.055 ------~1 599 1+----------'-------''-----------------'--------, -Le-g-en-d ~ 5990 5989 5988 g c 0 ~ al Uj 5987 - 5986 5985 ,--- WS 100-YR Ground • Bank Sta 5994 !---.--.--.---,.--,.--.,-.....,.........,....--,.-,.---.-.....----r----.~~....--r----r----r~..----.--.-~---.--1 0 50 100 150 200 250 Station (ft) tJRSwashington Division 29454-000 18 of 100 Rev.C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 3+59.00 Based on Field Su rve y Data ---.055 --____,---.04 ----+1~-----.055 -------->1 g c: 0 5993- 5992 5991 1ii 5990 a; w 5989 5988 5987 5995 +--.---....--.~~....-_,...~~...---r----.----.~~-.----.-~~...--.----.----..,,...-..,....--.----.-~~...--'i 0 50 100 150 200 250 Station (ft) 'URSwashington Division Legend WS 100 -YR -·-Ground • Bank Sta 29454-000 19 of 100 Rev.C ) ) Chev r on 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 4+48.00 Bas ed on Field Survey Data ----.055 ---~-----.04 ----->1<----.055 ---- 5996-l------------'---------------'--------------, ~~L-eg_e_n--,.d ~ 5995 5994 5993 g c: 0 ~ 5992 a; u::i 5991 5990 5989 598B t-~..-~~--,~-.,.~_,.~-r~---..~-r~......,-~-.-~~~-,-~-,.-~.-~~----1 0 ~ ~ M M 100 1 ~ 1 ~ 1~ Station (ft) lJRSwashington Division WS 100·YR Gro un d • Bank Sta 29454-000 20 of 100 Rev . C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCT ION COMPANY Tom Creek Central Production Facility ST A 5+86.00 Bas ed on Fi eld Survey Data -----.055--~~----.04 ----->il,.__ ___ .055----->< 5999-l----------'-----------~~--------L__~ r---o-L-eg-e-nd...,......, g c: 0 ~ a; iii 5997 5996 5995 5994 5993 5992 WS 100-YR Ground • B ank Sta 5991-I--.-----.---.---.--...---.--..--.-------.---..---.------'. 120 140 160 0 20 40 1JRSwashington Division 29454-000 60 80 Station (ft) 2 1 of 100 100 Rev .C ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 7+5 2.00 Based on Field Survey Data :.-----.055 ------,.---.04----;----.055---- 6012+-------------'--------'-------------'-----, ~-L-eg_e_n _d ~ 6010 6008 6006 6004 6002 6000 5998 5996 WS 100·YR Grou nd • Bank Sta 5994-1---..-------.--..---..---.---..---...---.-----.---,.---.---,---.--__., 0 20 40 60 DSwashington Division 29454-000 80 Station (ft) 22 of 100 100 120 140 160 Rev. C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 7+87.00 Based on Field Survey Data ><---.055--------.04----1 ~----.055 ----_,. 6014.--------~-------~~-----------------, ~l-eg-e-nd~ g c 0 :g ~ w 6012 6010 6008 6006 6004 6002 - 6000 5998 WS 100-YR Ground • Bank Sta 5995 -1-..---...-,-......... ....-...-..-,.--..,.--,...--.,.---.--...,-..,.....-,.........,---.,.--,----r-,....,,-,--.--.--,--.--.-.,----..--,...-.--1 0 20 40 60 80 100 120 140 Station (ft) URSwashington Division 29454-000 23 of 100 Re v .C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 8+34 .00 Based on Field Survey Data ---.oss --~<-------.04 ----1 ,___---.oss ------+ 6014-----.------'-----------''----------------, ~Le-g-en-d ~ g c: 0 6012 6010 6008 ~ 6006 a; u:; 6004 6002 6000 WS 100-YA --Ground • Bank Sta 5999-I-..--.-.--.--.--.-.--.--.--,-.-.--.--.--.--.--.---.--.--.--.--....--.---..-,-....--,........., 0 20 'URSwashington Division 29454-000 40 60 S1ation (ft) 24 of 100 80 10 0 120 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 8+56.00 Based on Field Survey Data 1<-----.os s----.... ~----.04 -----"'"1 ----.ass---__,, 601 4._ ___________________ _._ _________ .._, ~-..,.-Le-g-en_,.d -, g 8 6012 60 10 6008 ~ 6006 a; w 6004 6002 6000 S998 i-~-...-...--......-..---.-...-...--.-......--..-.--.--..--.--.---.....-.~~---....--..--.~---..--.--,-.-.1, 0 10 20 30 40 so 60 7 0 Stati on (ft) 1JRSwashington Division WS 100·YR -·-Ground • Bank Sta 29454-000 25 of 100 Rev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 8+65 Downstream End of Ne w Bo x Culvert Base d on Field Survey Data 1<--------.055 -------+---.01s --~-----.05s--- 60 14--------------------'----------------'----, ~..,...Le-g-en~d ~ g c 0 6012 60 10 6008 '<ii 6006 ~ iii 6004 6002 - 6000 'URSwashington Division 29454-000 Station(ft) 26 of100 WS 100-YR Grou nd • Bank Sta Rev.C Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY DOWNSTREAM END OF NEW BOX CULVERT Tom Creek Central Production Facility Based on Field Survey Data .o ss------.k---.0 15 --->-<--.oss --> ~ege nd 60 1 6·~-------------'----------------~ I I 6014 6012· 6010 6008 §: c 0 ~ iii w 6006· 6004 Road I cu lvert overly ing fil l 6002 100-yr flood even t 6000 5 99a ..1---------~------------...--......---------l 0 10 20 30 40 5 0 Stati on (ft) 'IJRSwashington Division WS 100-YR -·-G round • Ba nk Sta 29454-000 27of100 Rev.C ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY UPSTREAM END OF NEW BOX CULVERT Tom Creek Central Production Facility B ased on Field Survey Data k ------.oss -------.1.:--.0 16 --><-.oss --- 6016'~-----------------------------~ Legend g c: 0 6012 6010 - ~ 6008 - a; w 6006 6004 - 6002 R oad I culvert overlying fi ll LJ Unu sed c ulvert area -100-yr flo od event 6000 1---------~-----..- o 10 20 30 Stalion (ft) URSwashington Div is ion 29454-000 28 of 100 40 50 60 WS 100-YR -. - Ground • Bank Sta Rev. C Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 9+30 Upstream End of New Bo x Culvert Based on Field Survey Data 1<--------.oss --.016--1 .ass --~ g c 0 6016 6014 6012 6010 ~ 6008 a; w 6006 6004 - 6002 · 6000 f--,,-,.--,.--,.--,.--,.--,.--.,--.,-.,-.,-..,-.,.-.,..-, 0 10 20 30 Station (ft) URSwashington Division h------~~~I 40 so 60 Legend WS 100-YR Ground • Bank Sta 29454-000 29of100 Rev.C ) ) ) Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 9+40.00 Rip-ra p Rundow n to N ew Box Culvert Ba s ed on Field Survey Data ----.oss ---*--------.04 ---------e--.oss - 60 1 6:+------~------------------~--~._____, -Le-g-en_d _ 60 14 6012 g c: 0 ~ a; ijj 6010 6008 6006-·t--.--,...--.--.--..--.,..- 0 10 20 tJRSwashington Division 2 9454-000 30 40 50 Station (ft) 30 of 100 60 70 WS 100-YR Ground • Bank Sta R ev . C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 9+65 Stre am Widening W ith Rip-rap Erosion Prot ection Bas ed on Field Survey Data .oss -~~---.04 ----------.oss -----..., 60 1 3.__----'-----------'--------------L----~ ~-L-eg-e-nd~ 60 12 • -- 60 11 6010 g c 0 ii ~ w 6009 · 6008 6007 6006·1-~~.....-.....-...--...- 0 20 DSwash ington Division 29454-000 40 60 Statio n (ft) 3 1 of 100 80 100 120 WS 100-Y R Ground • Bank Sta Rev . C ) ) ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 10+ 15.00 Start Regrading of Stream Bottom Based on Field Survey Data .oss -1 .04 1 .ass --->< g 5 6010.5 6010.0 ~ 6009.5 a; Ui 6009.0- 6008 .5 6008.0 !----.-~----.--. 0 20 40 URSwashington Division 29454-000 60 80 Station (ft) 32 of 100 100 120 140 160 WS 100-YR Ground • Bank Sta Rev. C Ch evron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 10+82.00 Bas ed on Field Survey Data l*------.055 ---------.04 -----)-------.055 ------- 6015.._----------'---------------------'-~ ,-,-L-eg-e-nd~ 6014 6013 6012 g c: 0 ~ ~ UJ 60 11 6010 6009 WS 100-YR -·-Ground • Bank Sta 600B +--.-------..----.----.---,--......---r--...--------..---.----.-------I 0 20 40 60 DSwash ington Division 29454-000 80 Station (ft) 33 of 100 100 120 140 160 Rev.C ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY g c 0 ~ ~ w 6019 6018 60 17 60 16 60 15 6014 Tom Creek Central Production Facility STA 12+79.00 Based on Field Survey Data ><----.oss-------->1!<----.04 ------------.oss----- 6013+-..---r--...---.-.....----.,-,..-,--,-....,..._...,.......___,,......... _ _,........,......_,,_,.........---r--.--.-...,..-...--r-----.---.-..,.........., 0 ~ ~ 00 M 100 1~ 1 ~ Station (ft) 1JR.Swashington Division Leg e nd WS 100·YR -·-Gro und • Bank Sta 29454-000 34of100 Rev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility SAT 14+25.00 --With CPF Protective Berm Based on Field Survey Data .oss--------.04 ----->+<------~ .oss -------->1 6030.._ ___________ ..__ _____________ ~----. ~Le-ge_n_d ~ g c 0 ~ a; u::; 6028 6026 6024 6022 WS 100-YR Ground • Bank Sta 6020 1-...--..--...--.-..-.--,,--,-.--.,---,-..---,....-.,.-,...-.,....-.,---,...-,...-,...-.,--.,--...,---,--...,.-.,..-.,--., 0 20 40 tJRSwashington Division 29454-000 60 Station (ft) 35 of 100 80 100 120 Rev .C ) ) ) Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 15+41 .00 Based on Field Survey Data .oss -J..___.04 --i<---------.oss--------_,. 6030------'-------'------------------------Le-g-en_d _ -· 6026 g c: 0 ~ ~ w 6024 6022 6020--~,----.--.--,--...-.,---,,-,...-,...-.--.-T--.--........,...--,---.--..--.-..--.--.--.--.--..._..-.....,....--..-_,.....,J, 0 20 ~ 00 ~ 100 120 1~ Station(ft) URSwashington Division WS 100 -YR Ground • Bank Sta 29454-000 36 of 100 Rev. C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 16+56.00 --With CPF Protective Berm Based on Field Survey Data .oss -~0-----.04 ------------.ass -----_, 6036-1--------'-----------------------__._-~ ~L-eg_e_n_d ~ g c: 0 ~ a; [jj 6034 6032 6030 6028 WS 100-YR Ground • Bank Sta 6026 1--.---.--...--...-.....-----..-.....-...---.---..-..-....---.---.---,.-.---.---.---.---..---'. 0 20 40 60 80 100 Station (ft) tmSwashington Division 29454-000 37 of 100 Rev.C ) ) ) ) Chevron Ill 6038 6036 g c 0 ~ 6034 ii> iii 6032 6030 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 17+52.00 Based on Field Survey Data .055 Legend WS 100-YR ·-Ground • Bank Sta 6028:+-...,.--~...,.--~~~~-..--..-...,....-...,.--...,.--...,.--...,....-...,....-...,....-...,....---.-...,.---.--.--.--.--......--.-......-....--\ 0 50 100 tmswashington Division 29454-000 150 Station (ft) 38of100 200 250 300 Rev.C Chevron Ill 60SS 60SO g c: 0 ~ 604S iil w 6040 603S CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 18+30.00 Based on Field Survey Data 1<-------.oss-----------.04----+-<-----.ass----. WS 100-Y R • G round • Bank Sta 5030 +--.---.--...,.-...,.--,---,---,-.....,........,...---,.----,.-......,.......,.__,.___,___,..--.---..---..---....-....--.--...,.---,---,---,--,-_., 140 160 180 'URSwashington Division 2 9454 -000 200 Station (ft) 39 of 100 220 240 260 Rev. C ) ) Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 18+80.00 Base d on Field Survey Data i.-----.055----->1<---.04 --*10--------.055 ------j ___ _ 6060 ~--'----------.I-------'-----------------, g c .!2 ... ~ u:; 6055 6050 6045 6040 6035 Legend WS 100-YR Ground • Bank Sta 6030-l---.------.,,----.---.--,---.-----..--.-------...---,---.---.---i, 140 160 160 tmSwashington Division 29454-000 200 220 Station (ft) 40 of 100 240 260 260 300 Re v. C Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 19+80.00 Based on Field Survey Data ~--.oss--~-.04 __,.,. _______ .oss --------.; 6070-r----------"-------'----------------'-----, g c: 0 6065 6060 6055 ~ 605 0 ~ iii 6045 6040 6035- 5030 +-..---.---..--r--.--.......-.....-,.....-r--r--...-....,....-,--...--...----.---.."""'T'".....,......,.... ....... .......-.,...-...--.--...-.---; 100 150 200 250 300 350 400 4 50 Station (ft) URSwashington Division Legend WS 10 0-Y R -·-Groun d • Ba nk Sta 29454-000 41 of 100 Rev. C ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility Sta 20+80.00 Base d on Field Survey Data ><---.oss ----.-.04 -~------.oss---------.. 6070·,.----'--------L-----'----------------L------, 6065 6060 6055 g c 0 ~ ~ Ui 6050 6045 6040 6035+--i-----r--.---.--.-...,....~..-,.-,..-,__,._,..~...,....-r-~..-,.-___,._,.......,.....,....-r-"T"""..-.,.....,r----.---...-.-~ 100 150 200 250 300 350 400 450 Station (ft) URSwashington Division Legend WS 100-YR -·-Grou nd • Bank Sta 29454-000 42 of 100 Rev.C Chevron 111111 6090 6080 6070 g c 0 ~ a; w 6060 6050 6040 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility ST A 21 +80.00 Based on Field Survey Data 1<------.oss ----->-~-.o4 --*1 -----.oss -----_., Legend WS 100-YR -·-Ground • Bank Sta 6030---------------------.--------.----.-----.----.----. 50 100 150 200 'URSwashington Division 29454-000 250 Station (ft} 43 of 100 300 350 400 450 Rev. C ) ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 23+80.00 Based on Field Survey Data ----------.055 .04 --•.I 6070 .-...---------------------------,~,--~ -Le-g-en_d _ 6065 6060 g c: 0 -~ ~ w 6055 6050 5 WS 100-YR -·-Ground • Bank Sta 5045 -l-.-----..--r---.-..-----.---.........,........,....-.-..,.....____,,_..,........,........,.... ......... -.,.......,,_..,........,........,.... ......... ......-.,--.----.-.....,....--.--1 100 120 140 160 180 200 220 240 Station(ft) URSwashington Division 29454-000 44of100 Rev.C Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 25+80.00 Based on Field Survey Data 1<------.oss -----~ 6110 -------------~o,-'--------------'------~--~ 4 Legend -<-------.oss ----~ 6100 6090 € c .2 iii 6080 a; iii 6070 6060 WS 100-YR -. Ground • Bank Sta 6oso -J---.----.----.,,.--....--.---...--..---.-....,.-..---....,....---..-,.--....--..-....,.-.....-...,.---,.----..--....--1 0 100 200 300 400 500 Station (ft) 'URiSwashington Division 29454-000 45of100 Rev.C ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 27+80.00 Base d on Field Survey Data 1<-------.oss --~ .o4-*-------.ass ------- 6085·~---'-------------'----------------'---~--L-eg_e_n_d _ 6080 607S - g c 0 ~ ~ iiJ 6070 6065 606Q,+-..-----.---.~--.--.-~....-..--.--......... ---.-~-.--.-~.....-~..---.---.-........ --.--.--.-....-~..-----.---.---.--\ 100 1 SO 200 2SO 300 3SO 400 4SO Stati on {ft) URSwashington Division WS 100-YR -·-G round • I nett • Bank Sta 29 454 -000 46 of 100 Rev .C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 29+80.00 Based on Field Survey Data .055 ----+><---.04 --~----.055 ----- 6084~---~~----~----~---------------~ ~-L-eg-e-nd~ 6082 6080 6078 g c 0 iii ~ UJ 6076 6074 6072 WS 100-YR -·-Ground & I nett • Bank Sta 6070-l--..,..-..,..--r--r-...,.-...,.--.-....,...--...-.....-.,..--...--...---.--.,--.,,....-...--..--..-..--..--..,..--.--...,.-...,.--,..--.,.......i, 100 150 200 'IJRSwashington Division 29454-000 250 Station (ft ) 47 of 100 300 350 400 Rev.C ) ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 31+80.00 Based on Field Survey Data I 1<----------.oss -------------;--.o4 -->. 5095.-,--L---------------------_.__---o,---~ g c 0 ~ a; Ui 6094 6092 6090 6088 6086 5 5 6084+-..,....-..,.........,--..,.........,--..,........,........,....-..,......,_..,........,....-..,........,....-,-..,........,......-..,....-..,........,....-..,....-..,........,....--..,........,....-..,........,.........,, 100 120 140 'IJRSwashington Division 160 Station (f t) 180 200 220 Legend WS 100·YR -·-Ground • Bank Sta 29454-000 48 of 100 Rev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 33+80.00 Based on Field Survey Data 1<-------.oss ------11<-----.04 ---->-1<1 .os 610 6--_ _J__ ____________ _,__ ________ ____,__-'---~ ~L-e -ge_n_d ~ 6104 6102 g c 0 ~ ~ UJ 6100· 6098 WS 100-Y R -·-Gro und -J.- lneff • Bank Sta 6096:+--....-....... ---.~~...,....---.-~---.~...-........ --.-~__,....-...-~-.----r~r--...--.-................ ~~-.-~ 240 140 16 0 180 200 220 Stati on (ft) URSwashington Division 29454-000 49of100 Rev. C ) ) Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Central Production Facility STA 34+80.00 Based on Field Survey Data .055 .04 ___.J.: .055 6 11 4 ~-------'---------------------'---------'--~ g c: 0 6 11 2 6 11 0 ~ 6 108 iii Ui 61 06 6 104 5102 -l---.---.-....... --..------.--...-...------..-.--...---.----.---..-.---.-----.---,...........,, 0 so 100 150 200 250 Stat ion (It) 'URSwashington Division Legend WS 100·YR -·-G round ~ Inell • Bank Sta 29454-000 50 of 100 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY D. TOM CREEK EXISTING 100-YEAR FLOODPLAIN CROSS SECTIONS ) 1JRSwash jogton Division 29454-000 51 of 100 Rev.C ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Culvert Analysis Report For The Pre-Developed Condition For A 60" Diameter Culvert Under Clear Creek Road At Central Production Facility Culvert Summary Computed Headwater Ele vation Inlet Control HW El ev. 6,010.47 ft 6,010.07 ft 6 ,010.47 ft Outlet Control HW Elev. Headwater Depth/Height Grades Upstream Invert Lengt h Hydraulic Profile Profile Slope Type Flow Regim e Velocity Downstream Section Section Shape Section Material Section Size Numbe r Sections Outlet Control Properties O utl et Control HW Elev. K e Inlet Control Properties Inlet Control HW Elev. Inlet Type K M c y Hydraulic Component(s): 1.09 6,005.00 ft 53.40 ft S2 Steep Supercritical 17.62 IVs Circular CMP 60inch 1 6,010.47 ft 0.70 6,01 O.o? ft Proj ecting 0.03400 1.50000 0.05530 0 .54000 Roadway (Constant Elevation) Di scharg e 382.7 els 8 Roadway Width 18.00 ft Length 73.50 ft Headwater Elevati on 6 ,010 ft .47 Submergence Factor (Kt) 1.00 Sta (ft) Elev. (ft) 0 .00 6,009.00 73.50 6,009.00 tJRSwashington Divis ion 29454-000 Discharge T ailwater El evation Control Type D ownstre am Invert Constructed Slope Depth, Downstream Normal Depth Critical Depth C ritical Slope Manning's Coefficient Span Rise Upstream Velocity H ead E ntra nce Loss Flow Control Area Full HO S 5 Chart HO S 5 Scale Equation Form Allowable HW El evation Overtopping Coe ff icient C rest El evation Discharge Coeffi cient (Cr) 52 of 100 122.42 el s 0 .00 ft Entra nce Control 5,999.90 ft 0 .095506 fVft 1.92 ft 1.8 1 ft 3.16 ft 0 .0 14233 tvft 0.024 5.00 ft 5.00 ft 1.36 ft 0 .95 ft Unsubmerged 19.6 ft 2 2 3 1 6,010.47 ft 2.91 us 6 ,009.00 ft 2.9 1 Rev . C Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) tJRSwashington Division 29454-000 53 of 100 Rev. C ) Chevron === CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Culvert Analysis Report For The Existing Condition For A 60" Diameter Culvert Under Clear Creek Road At Central Production Facility Culvert Summary Computed Headwater Elevation 6,010.47 ft Disch arge 122.42 cfs Inlet Control HW Ele v. 6,010.07 ft Tailwater Elevation 0.00 ft Outlet Control HW Elev. 6,010.47 ft Control Type Entrance Control Headwater Depth/Height 1.09 Grades Upstream Inve rt 6,005.00 ft Dow nstream In vert 5 ,999.90 ft Length 53.40 ft Constructed Slope 0 .095506 fVft Hydraulic Profile Profile S2 Depth, Downstream 1 .92 ft Sl ope Type Steep Normal Depth 1.81 ft Flow Regime Supercritical Critical Depth 3.16 ft Velocity Downstream 17.62 fVs Critical Slope 0.014233 fVft Section Section Shape Circular Manning's Coefficient 0.024 Section Material CMP Span 5.00 ft Section Size 60inch Rise 5.00 ft Number Sections 1 Outlet Control Properties Outlet Control HW Elev. 6,010.47 ft Upstream Velocity 1.36 ft Head Ke 0.70 Ent rance Loss 0.95 ft Inlet Control Properties Inl et Control HW Elev. 6,0 10.07 ft Flow Control Unsubmerged Inlet Type Projecti ng Area Fu ll 19.6 ft2 K 0 .03400 HDS 5 Chart 2 M 1.50000 HDS 5 Scale 3 c 0.05530 Equation Form y 0 .54000 Hydrauli c Component(s): Roadway (Constant Elevation} Discharge 382.78 el s Allowable HW 6,010.47 ft Ele vatio n Ro adway Width 18.00 ft Overtopping Coefficient 2.91 us Length 73.50 ft Crest Elevation 6,009.00 ft Headwater El evation 6,010.47 ft Discharge Coefficient 2 .91 (Cr) Submergence Factor (Kt) 1.00 Sta (ft) El ev. (fl) 0.00 6 ,009.00 73.50 6,009.00 'URSwashington Division 29454 -000 54of100 Rev. C Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 0+00 -Center Line Of Clear C reek Based on Field Survey Data ><--------.055 ___ , ___ .04 ---~-----.055------4! 5994+---------'-------'-----------------'-----. .---,-L-eg_e_n-,-d ~ g c: 0 ~ ~ L1J 5982 5980 5976 50 URSwashington Divis ion 29454-000 100 Station (11) 55 of 100 150 200 250 WS 100-YR -·-G rou nd • Bank Sta Rev.C ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing ST A 0+30.00 --Easterly Edge of Clear Creek Based on Field Survey Data I<---.oss ---..i.1,__ .04 __J,,, _______ .ass -------- S986+---------'-------'------------------'----, S984 S982 g c: .Q <ii S980 a; iii S976 -----, so 100 1SO 200 250 Stati on (ft) tJRSwashington Division Legend WS 100-YR Ground • Bank Sta 29454-000 56of100 Rev. C Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 0+8 7.00 -Eas terl y Floodplain of Cle ar Creek Ba sed on Field Survey Data ,.__ __ .055 ------'--.04 --->+<-1 -------.o5s ------~ 5985 -1----------'-----'----------------~----, .---,-L-e g-e-nd...,--, g c 0 ~ 41 iii 5984 - 5983 5982 5981- 5980 5979 WS 100-YR Gro und • Bank Sta 5970 . .J--.---,..-.----r---.--"'T"'""--,....---.,.-..----.---.-,--...---.--.-..-.--,----.----.-_,, 0 50 100 150 200 250 Station (ft) 'URSwashington Division 29454 -000 57of100 Rev. C ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing ST A 1 +40.00 Based on Field Su N e y Data ---.ass ---""----.a4 ----*-----.ass------>< S987-l--------L-. _______ J.._ ___________ _J_ __ _, g c: 0 S986 S98S S984 ~ S983 a; iii S982 5981 S98a 5979 !---.--.---,.~~-.--,.-~~,..--.--,..........,.---,--.-~~..---.---.----.-..--....,..--,..---.~~ a sa 1aa 1s a 2aa 25a Station (ft) tJRSwashington Division Legend WS 1aa-YR Ground • Bank Sta 29454-000 58 of 100 Rev. C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 2+99.00 Based on Field Survey Data 1<----.055 ---->1<--.04 -~-------.055 ------- 5991+-----------'-----'---------------------~~~L-eg_e_n~d ~ g c: 0 ~ a; w 5990 5989 5988 5997 - 5986 5985 WS 100-YR Ground • Bank Sta 5994 1--....--.----.~.....-....---.-~~.....-....---.----.~~-.---...~~...---.----.----,...--.---.---.-~~.....-~ 0 50 100 150 200 250 Station (fl) 'lJRSwashinqton Division 29454-000 59 of 100 Rev.C ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 3+59 Bas ed on Field Survey Data ---.oss --__,~--.04 ~ .oss ------ 5994+-------_J._----------'--------------~---. 5993 5992 5991 g c .Q 5990 iii a:. w 5989 5988 5987 5995 f--...,....--.--...~.....--i--,.-~---.-,_....-,--.--,..~,.........-,--,-~~.---.--.--...~.---.--.----.-~.--'i 0 50 100 150 200 250 Station (ft) 1JRSwash inqton Divis i on legend WS 100-YR Ground • Bank Sta 2945 4 -00 0 60of100 Rev.C Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing ST A 4+48 .00 Based on Field Survey Data J<-----.055------------.04 -----...__---.055 ---~ 5995+----------------------'------------~ 5995 5994 5993 g c 0 ·~ 5992 4i Ui 5991 5990 5989 59ss +--..---..---..---..---..-----,,.....----,,.....----,-----,.-------..---...--...-----I O W ~ ~ M 100 1W 1~ 1W Station (ft) 11RSwashington Division Legend WS 100-YR --Ground • Bank Sta 29454-000 61 of 100 Rev. C ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 5+86.00 Based on Field Survey Dat a ><---.055 ---0-----.04 ----->+<1----.055 ----J. 5999:+-------_.__-----------~----------'-----, 5997 5996 5995 g c: 0 ~ ii; w 5994 5993 5992 20 599 1 -1--.------,---..----..----..---r----,..~....,..~-----.---,-----r-------. 0 40 URSwashington Division 60 80 Station (ft) 100 120 140 160 Legend WS 100-YR Ground • Bank Sta 29454-000 62 of 100 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 7+52.00 Based on Field Survey Data 1<------.oss -----.1.---.04 -------.oss---->< 6012+------------~-------~--------~-----. ~~L-e g-e-nd-,--, g c: 0 ~ a; Ui 6010 6008 6006 6004 6002 ··~ 6000- 5998 5996 5994-1--.,..........---.--.-----..,.-----.----.---.---..-------r----r----..-----., 0 20 4 0 60 80 100 120 140 160 Statio n (ft) 1.JllSwasbjngton Divjsjon WS 100-YR Ground • Bank Sta 29454-000 6 3 of 100 Rev .C ) ) ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 7+87.00 Based on Field Survey Da ta I<-----.055 ---~----.04 -----i.i.------.055 ----- 6014*-----------'-------------'----------------, 6012 60 10 6008 6006 g c: 0 ~ a; Lii 6004 6002 -----------· 6000 5998 5995 !--.....---.--.---..--.-~...--.---.~-...-.---.--.-..--....-,.----..-,..-.....--.--.-...-...-.---.--..-.--..-.........-', 0 20 40 60 80 100 120 140 Stati on {ft) URSwash ington Di vi si on Legend WS 100-YR Ground • Bank Sta 29454-000 64 of 100 Re v .C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 8+34.00 Based on Field Survey Data ><------.055 .04 .055 -601 4.._ _____________ __,_ ______________ ---'------'~ ~-L-eg_e_n_d ~ g 5 60 12 60 10 6008 ~ 6006 ~ w 6004 6002 6000 WS 100-Y R Ground • Bank Sta 599s-1--.---.._,...--.--..--.-~-.-,-,,_-,--.--.-~.......--.-..,..-..--.-----.-...--.---.--.-..,.....=.-..--..---,..-,...-,...--1, 0 10 20 30 40 50 60 70 Station (ft) URSwash jngton Division 2 9454 -000 65 of 100 Rev. C ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 8+56.00 Based on Field Survey Data ,.__ __ .055 .04 .055 -> 6014-----11~-----.l.__----------------------~ 6012 6010 6008 g c 0 ~ 6006 a; ii:i 6004 6002 6000 5999 -l--.~---.---~~~--------.-~-.-.----.-......... -.--.-...-.,.........,-.---... ........ ....--1 0 10 20 30 40 50 60 70 Station (ft) l1RSwashington Division Legend WS 100 -YR Ground • Bank Sta 29454-000 66of100 Rev . C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 8+65.00 -- Dow nstrea m Di scharge of Existin g 60-inch CMP Based on Fi eld Survey Data ~--.oss ---------.04 ---------.oss ------~ 60 1 6+--------+-----~--------------~---~ -L-e g-e-nd~ g c 0 ~ a; iii 6014 601 2 6010 6008 6006 6004 6002 6000 WS 100-YR Ground • Bank Sta 5gga 1---.--.-~.--~-.---.~...,--.----.~...,--.-~~..--.-~~.---.--.----,.--...---.---.~~-.---.. 0 50 100 150 200 250 Station (ft) 1111Swashington Division 29454-000 67 of 100 Rev. C ) ) ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY DOWNSTREAM END OF EXISTING CULVERT Tom Creek Existing Existing 60" CMP Based_ on Field Survey Data K:---.055 ><--.04 ->-<<----.055 60 16 ·-~----------------------------~~gend "" '~·-· I I ' I ' I : \ Road fi ll -100-yr flood event 6012 - i ~ ' I 6010- 6008- g c 0 :; iii Ui 6006 - 6004 6002 - 6000 - 5998.l-----------..--...-----..------.-....---.---.-----.--" 0 50 100 150 200 250 Station (ft) 11RSwasbjngton Division WS1~·YR I Ground • Bank Sta 29454-000 68of100 Rev.C Chevron 1111 6014 - 6012 6010 g c 0 ~ ~ iii 6008- 6006 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY . "'.04 >-< UPSTREAM END OF EXISTING CULVERT Tom Creek Existing Existing 60" CMP Based on Field Survey Data .oss ----------~ 0---------------------------~ 5 I Legend 5 Road fill \ 100-yr fl ood eve nt -100-yr fl ood event -ineffecti ve flow ("' WS 100-YR -·-Ground .t. lneff • Bank Sta 6004 J...----.....--.....---------------------------', 0 100 200 'lmSwashington Division 29454-000 300 Station (ft) 69 of 100 400 500 600 Rev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 9+30 -Upstream End Of Existing 60-inch CMP Bas ed on Field Survey Data .04 >i<------------.oss ------------>i 6014,....-----'-o..L.----L _______________________ __,__ __ -, 6012 60 10 6008 - 60 06 s s \ 10 0-yr fl ood event flow -100-yr fl ood event -in effecti ve fl ow 6004+-...--...--........--.--.--....,--.--....,.......,...-,--,----.-.....,......,.--r--.----.~~.--.--.,.......,.......,....-...--~........--.---.---.--4 0 100 200 1JRSwashington Di v ision 300 Sta tion (ft) 400 soo 600 L egend WS 100 -YR -·-Gro un d -.t. Inell • Bank Sta 29454-000 70 of 100 Rev.C Chevron 11111 6012- 60 10 §: c: 0 ~ ~ w 6008 6006 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY To m Creek Existing STA 9+40.00 --E xisting O verflow Area B ased on Field Survey Da t a .04 ->'<-----------.oss -----------+< WS 100-YR Gro-und • Bank Sta 6004-1-...--...--.....-.....--.-...--.---.---.---.--.---.---.---.----.---.--..--.-,r-.-.-...--...---.--...-.....--.--1 0 50 100 URSwash jogton Di vision 29454-000 150 Station (ft) 71 of 100 200 250 300 Re v. C ) ) ) Chevron -CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing ST A 9+65 --Existing Overflow Area Based on Field Survey Data .oss J.-.04 -...~----------.055 6013---'----~--------------------------, 6012 6011 6010 g c 0 :; a; w 6009 6008 6007 6006 +-..----..--..-,--,.--..-~...,.-..--,.--,r-T--.-~-r--.-~.,......,----..--,-.....,...-,--..-..,-...,.-..--,----..--.--,-4 0 50 100 15 0 200 250 300 350 Station(ft) URSwashington Division Legend WS 100-YR -·-Ground • Bank Sta 29454-000 72of100 Rev.C Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing ST A 1O+15.00 --Existing Ove rflo w Area Bas ed on Field Survey D at a .055 +k .04 I .055 ----------->1 6013+--'----L------------------------'----.~L-e -ge-n~d ~ g 5 6012 601 1 "iii 6010 a; u::i 6009 6008 WS 100·YR G round • Ba nk Sta ~--~ 6007 i--~~~~~~~~~~---....-....-....-....--......-......--.-...--.---.--.--...-.-...---r--'. 0 100 200 'lmSwashington Division 29454-000 300 Station (ft) 73of100 400 500 600 R ev .C ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 10+82.00 Ba se d on Field Survey Data -.04 .055 60 1 8 .------''-l\-'--~----------------------------, ~-L-eg_e_n_d ~ 5 5 6016 6014- g c: 0 ~ a; w 6012 6010 600S+-..-----.-..---,--.--...,.......--....-,......,.-.,..-"""T""-.---.--..--,.----,---,.--.---.--.--.--r--..--....--..-.....-,---'i 0 100 200 300 400 500 600 700 Station (ft) URSwashington Division WS 100-YR -·-Ground _, Inell • Bank Sta 29454-000 74of100 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 12+79.00 Based on Field Survey Data .oss -.k-.04 1 .055 6020,.-----'--"----------------------~-----. ~-L-eg_e_n_d ~ 6019 6018 6017 g c 0 ~ ~ iii 6016 6015 6014 WS 100-YR -·-Ground • Bank Sta 6013+--.---.--.....--.-........ ---..---.--.----..-.---.---.----.-..---.-.....,....---.-..---.-.....,....--,--...,......- 0 100 200 300 400 500 Station (ft) 'URSwashington Division 29454-000 75 of 100 Rev. C ) ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing . ~.o4 ..I. STA 14+25.00 Ba se d on Field Survey Data .055 6030 01-----'---------------------------'------, ~L-eg_e_n_d ~ 5 5 6028 6026 g c 0 ·~ ~ Ui 6024 6022 6020+-..---.-..--.--.--.--..-,--,,-..,-,.-...--,.-....--..--.-----.----.--.--.--.-.,,-..-,--,,_--,........,..-,-.., 0 100 200 300 400 500 600 700 Station (ft) tm5washington Division WS 100·YR Ground • Bank Sta 29454-000 76 of 100 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 15+41.00 Based on Field Survey Data -.04 -1 .055 6030_,.,,_._ _ _._ ________________________ ~-----, .---,-L-eg_e_n~d ~ 5 6028 · 6026 g c: 0 ~ ~ ill 6024 6022 5 W S 100-YR G ro und • Ban k Sta 6020-1--~---.---.--~-.-....-..--~~~~~--.--.-....-..--........ --..-.---.--.--..--.-....-..--............... -.--...-~ 0 50 10 0 150 200 250 300 350 Station(ft) DSwashington Division 29454-000 77 of 100 Rev .C ) ) ) Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 16+56.00 Based on Field Survey Data -.055 -+!1<---.04 --->*----------.055 ----------- 6036 +----'-------'----------------------'---, --L-eg_e_n_d ~ 6034 · 6032 g c: 0 ~ ~ iii 6030 6028 6025 -l--.--.----..---.--.----..-.--.---..----..---.--....~-...---.--.---,--...---.---..---r--':1 0 50 100 150 200 2 50 Station (fl) tJRSwashington Division WS 100-YR Ground • Bank Sta 29454-000 78 of 100 Rev.C Chevron Ill g c 0 6038 6036 ~ 6034 a; w 6032 6030 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 17+52.00 Based on Field Survey Data .055 WS 100·YR Ground • Bank Sta 6028 -l--...--.-...-....--.--r--..----r---r---r---r--r-r--..--.--.--ir--i---.--..--..--.,---.--.-~-.--.--.---.---', 0 50 100 URSwashinqton Division 29454-000 150 Stati on (ft) 79 of 100 200 250 300 Rev.C ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing ST A 18+30.0 0 Based on Field Survey Data 6060 ------.oss --------;~1 --.04 __ ,....,___ __ .ass ----., Legend WS 100-YR Ground • Bank Sta 60SS 60SO g c .2 ;;; 604S ii; w 6040 603S 603Q I--.--.--..---..--..-..,.--.---,-..,_ ................ -.--,--..---,-.--,..--...---,.__,.--,.--,--,~.--.--~..--..--.-..,..---', 140 160 tJRSwashington Division 29454-000 180 200 Station (ft) 80of100 220 240 260 Rev.C Chevron ... CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 18+80.00 Based on Field Survey Data ..__ ___ .oss ---------.04 --1 .os s ------ 6060,~-..l..._ _________ j__ ____ -'----------------. .---,L-e-ge-n_,.d - 6055 6050 g c 0 ~ 604 5 it w 6040- 6035 6030 1--~.--~~--,.----.~--.~--..~--..~--..~-..~-...~---..-~--,.-~-..-~-,-~~~~ 140 160 180 200 220 240 260 280 300 Station(ft) 'URSwashington Division WS 100-Y R Ground • Bank Sta 29454-000 81 of 100 Rev.C ) ) ) ) Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 19+80.00 Based on Field Survey Data .....---.055 ------..,.___04 --->+<-------.055 ------->1 6070,~------------'------'--------------_.__-----., ~-L-eg_e_n_d ~ 6065 6060 6055 g c: 0 ~ 6050 ~ jjj 6045 6040 6035 \ WS 100-YR Ground • Bank Sta 603o l.......---...---.----r--.--.-...----...or-i--..---..---r-.....--~-.--,-.--.--.~---.---.--.--..-""F""""".,.-.,.--,--,.---...---.-.....---,--i, 100 150 200 250 300 350 400 450 Station (ft) 1JRSwashington Division 29454-000 82of100 R e v .C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing Sta 20+80 .00 Based on Fi eld Survey Data >+-----.oss --~<--.04 --------.oss------~ 6070----'-------------'----'---------------~-----, ,---,-L-e g_e_n....,.d --, 6065 6060 6055 g c .9 <;; ~ iii 6050 6045 6040 WS 100-YA Ground • Bank Sta 6035~...--.--,.-,--r-,.--.--.-.,--..-.......... --..-,---.--.-....,.....-,,--.--,r--r--..--r-r--,.--.--.-.,-----.-,.--,..-', 100 150 200 250 300 350 400 450 Station (ft) UllSwashington Division 2 945 4-000 8 3 of 100 Rev. C ) Chevron -CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 21+80.00 Ba se d on Field Survey Data .04 --*1 -----.oss ------1<-----.oss ------- 61oo ~i_ __________ __L_ ___ __J ____________ __L__-, 6090 6080 6070 g c 0 ~ a; iii 6060 6050 6040 60301.J---.....----.....--,..---.----,,....---,---,----.-----....---...---...---...----.J, 50 100 150 200 250 300 350 400 450 Station (ft) tJRSwashington Division Lege nd WS 100·YR -·-G round • Bank Sta 29454-000 84of100 Rev.C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing ST A 23+80.00 Based on Field Survey Data l<-----------.05 5 .04 ~.I 6070,~_._---------------------------151------..., ~L-eg_e_n_d ~ 6065 6060 g c 0 ~ ~ w 6055 6050 5 WS 100-YR -·-Ground • Bank Sta 6045 __ ,,_..___,__,._.,.._,........,........,...._,__,,_...,.-,.........,__,.---.-......... -...--..---.,-,.--...--...--.--.-....-...--..--.......... ---...--...--. 100 120 140 160 180 200 220 240 Station (ft) DSwashington Division 29454-000 85 of 100 Rev. C ) ) Chevron ... CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Ex isting STA 25+80.00 Based on Field Survey Data <----.oss----->< 1<-------.oss ------" 61101 ~-------------'--i-.-L------------__j_ _____ --L-eg_e_n_d _ 4 6100- 6090 g c: 0 ~ 6080 ~ w 6070 -- 6060 6050 1--....--.---..~~-.--.-~~.--....---.---.~..---.--.-~~....--.--.---.~.,.---,--.-~~.,--1, 0 100 200 300 400 500 Station (ft) URSwashington Division WS 100-YR Ground • Bank Sta 29454-000 86 of 100 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 27+80.00 Based on Field Survey Data ~--.oss -----.04 ----------.055 ----------->< 60ss~---'-----------~--------------~-----, ~~L-eg_e_n~d ~ 6080 6075 g c 0 ~ a; u::i 6070 - 6065 WS 100-YR -·-Ground ... l neff • Bank Sta 6060 +-...-----,.---r~-,--.-~......-...--,........,--.. ........ ~-,--.-...-....-...--,........,__,..--.--.,...-,-........ ...-..-,----... ........ --.----. 10 0 150 20 0 250 3 00 350 400 450 Station (ft) DSwashington Div ision 294 5 4-000 87 of100 Rev. C ) ) Chev r on 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 29+80.00 Based on Field Survey Data .oss------.04 __J.. .oss------- 6084 -r-----L_-----L------'-------------~-----, 6082 6080 6078 € c: 0 -~ ~ LU 6076 6074 6072 150 5070-l-.....--.....---.---.---.-....--.--.--.--.---.----,----,---.----.---.--...........,__,..........,,_...,...-,...-,.-...--...,..--.-....-....-~ 100 200 'URSwashington Division 250 Station (ft) 300 350 400 Legend WS 100-YR -·-Ground -i. Inell • Bank Sta 29454-000 88 of 100 Rev. C Chevron -CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 3 1+80.00 Ba sed on Field Survey Data I I !<------------.oss -------------.04 ------>. 6096·-.-L-----------------------'------ns ---~ ~-L-eg_e_n_d ~ g c 0 6094 6092 ii 6090 a; LiJ 6088 6086 5 5os4 1--~~~~~~~~~~~~~~~~~~__,.--~~~~~~~~~-.-~ 100 120 140 160 180 200 220 Station (ft) tJRSwashington Divis ion WS 100-YR ---G round • Ban k Sta 29454-0 00 89of100 Rev. C ) ) Chevron 1111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 33+80.00 Ba sed on Field Survey Data 1<------.oss ------!+-----.04 ---~.l.:.os 6106.-----"--------------'------------'---'------, ~-L-eg-e-nd~ 6104 6102 - g c 0 ~ a; iii 6100 6098 WS 100-YR -·-Ground -·-lneff • Bank Sta 6096+-----.----.--....----.---...-....----.----.--....----.----.-.....-----.----.-.....-....----.---..--...i, 140 160 180 200 220 240 Stati on (ft) URSwashington Division 29454-000 90 o f 100 Rev.C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Tom Creek Existing STA 34+80.00 Ba sed on Field Su rve y Da ta .055 .04-----...k.05 6 1 14--------'--------------------'------"---'-~ ~~l-e-ge-n~d ---, 6 11 2 6110 g c: 0 ~ 6108 al [jj 6 106 6104 6102 1---.-.....,....__,.~...--.....--.-~~.,.-...,--.---.~.,---.---.-~~...---.--...--.~..--.----.-~~-.--~ 0 50 100 150 200 250 Station(ft) 'lJRSwashington Div is ion WS 100-YR Ground 6 - l neff • Bank Sta 2 9454-000 91 of 100 Re v .C ) ) Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) E ROAN CREEK & TOM CREEK FLOODPLAIN HYDROLOGY ANALYSES tmSwashington Division 29454-000 92of100 Rev. C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) Roan Creek & Tom Creek Flood~lain Anal~sis Hydrology Calculations From Anal~sis of the Magnitude and Freguenc~ of Floods in ColoradQ WRI Report 99-4190 010 = 7 .56 * Ao.671 * po .60 1 Oso = 38.8 * A0.667 * p o.2 10 0 100 = 104.7 * A0·624 Osoo = 137.6 * A0 ·623 where, Or= T year flood peak in cubic feet per second, A = Drainage area in square miles , and P =Mean annual ~reci~itation in inches. Location A p 010 Oso 0100 Osoo Comments Garfield At RB3 Confluence 497 .55 18 2770 4479 5044 6588 County Line RB3 108.48 18 997 1622 1950 2551 Upstream RB3 389 .07 18 2349 3802 4326 5652 Intermediate Area 16.248 18 At LB4 Confluence 372.82 18 2283 3695 4213 5504 ) LB4 38 .148 18 494 808 1016 1330 Upstream LB4 334.68 18 2123 3438 3938 5146 Intermediate Area 13.822 18 At RB2 Confluence 320.85 18 2064 3343 3836 5012 RB2 51 .091 18 602 982 1219 1596 Upstream RB2 269.76 18 1837 2978 3443 4499 Intermed iate Area 1.9838 18 At LB3 Confluence 267.78 18 1828 2963 3427 4478 LB3 111.54 18 1016 1652 1984 2595 Clear Creek LB3e 111.54 18 1016 1652 1984 2595 LB3d 79.957 18 812 1323 1612 2109 LB3LB9 2.5903 18 81 134 190 249 Vinson Gulch LB3LB9a 1.3279 18 52 86 125 164 LB3LB9b 0 .9293 18 41 68 100 131 LB3LB9c 0 .3332 18 21 34 53 69 LB3LB8 2 .8898 18 88 144 203 267 Scott Gulch Combined 11.433 18 220 362 479 628 LB3LB7c 1.1817 18 48 80 116 153 LB3LB7b 10.251 18 205 336 447 587 Roan Creek & Tom Creek Flood~lain Anal~sis tJRSwashington Division 29454-000 93 of 1 oo Rev .C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY Hydrology Calculations (continued) Location A p 010 Oso 0100 Osoo Comments LB3LB7a 7.9381 18 172 283 381 500 Doe LB3LB6 4.8455 18 124 204 280 368 Gulch Buck LB3LB5 4.5319 18 118 195 269 353 Gulch Tom LB3LB4 12.441 18 233 383 505 662 Creek Combined 11.243 18 218 358 474 621 LB3LB4b 3.1645 18 93 154 215 282 LB3LB4a 8.0787 18 174 287 386 506 LB3c 52.018 18 609 993 1233 1614 Cottonwood ) LB3LB2 7.5246 18 166 274 369 484 Creek Combined 35.377 18 470 768 969 1269 LB3b 17.548 18 294 481 626 820 LB3a 17.829 18 297 486 632 828 Upstream LB3 156 .24 18 1273 2069 2448 3202 Intermediate Area 11.282 18 At LB2 Confluence 144 .96 18 1211 1968 2337 3055 Brush LB2 42 .113 18 528 863 1080 1415 Creek LB2e 42 .113 18 528 863 1080 1415 LB2d 34 .657 18 464 758 957 1253 LB2c 25.165 18 374 612 784 1026 LB2b 18 .295 18 302 495 642 841 LB2a 10.393 18 207 339 451 592 Upstream LB2 102 .85 18 962 1565 1886 2467 Intermediate Area 11.942 18 Confluence 90.908 18 885 1442 1746 2285 RB1 45.408 18 556 907 1132 1483 LB1 45.5 18 557 909 1134 1484 lJRSwashington Division 2 9454-000 94 of 100 R ev .C Chevron Ill CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY ) F. TOM CREEK FLOODPLAIN HEC-RAS OUTPUT URSwashington Division 29454-000 95of100 Rev. C Chevron === CHEVRON NORTH AMERICA EXP LORATION AND PRODUCTION CO M PANY 1. TABLE NO. 1 HEC-RAS OUTPUT -EXISTIN G CONDI TI ON River Q-100 Min. w.s. E.G. E.G. Cha n. Flow Top Chan . Station T otal Chan. Elev. Elev. Slope Vel. Area W id t h F ro ude El . (cfs) (ft) (ft) (ft) (%) (tt/s) (sq ft) (ft) No. 0+00.00 505 5974.00 5983.00 5983.00 0.0011% 0 .50 1449.38 225.00 0 .03 0+30.00 505 5974.20 5982.99 5983.01 0.0129% 1.20 562 .57 148.75 0.09 0+87.00 505 5978.22 5984.85 5985.15 0.9 194% 5.76 168.68 225.00 0.63 1+40 .00 505 5979.77 5986.24 5986 .69 1.2161% 5.70 1 18.5 1 198.75 0 .75 2+99.00 505 5984.90 5989.29 5989.85 1.2589% 6 .79 106.90 93 .26 0 .80 3+59 .00 505 5986.39 5989.98 5990.66 1.3456% 6 .65 78.42 54.06 0.83 4+48.00 505 5988 .51 5992.79 5993 .78 1.9904% 7.96 63.46 33.18 1.01 5+86 .00 505 599 1.78 5995.48 5996.60 1.9345% 8.47 59.60 27.21 1.01 7+52 .00 505 5995 .33 5999.67 6000.87 1.9363% 8.77 57.55 24.42 1.0 1 7+87.00 505 5997.00 6000.85 6001.27 0.5378% 5.21 96.84 35.13 0 .55 8+34 .00 505 5998 .14 6002.28 6003.44 1.9272% 8 .64 58.48 25.36 1.00 8+56.00 505 5999.15 6004.04 6004.37 0 .3955% 4.60 109.85 38.03 0.48 8+65 .0 0 505 5999.16 6003.97 6004.58 0.8667% 6.41 96 .67 111 .23 0 .69 9+29.90 EXISTING 60" C MP Culve rt ---- 9+30.00 505 6005.00 6009.88 6010.76 1.1693% 7 .52 67.15 454.32 0 .79 9+40.00 505 6005 .31 6010.84 6010.85 0.0267% 1.30 583 .35 232.78 0 .13 9+65.00 505 6006.18 6010.85 6010 .86 0 .0 105% 0.78 848.48 284.91 0 .08 10+15 .00 505 6007.6 1 6010.86 6010 .86 0.0041% 0.44 1453.17 524.79 0.05 10+82.00 505 6008.76 601 1.63 6012.31 2 .5273% 6 .62 76.25 63.66 1 .07 12+79.00 505 6013 .70 6016 .77 6017.76 1.9372% 7 .97 63.33 32.26 1.00 14+25 .00 505 6020.80 6023.1 1 6023.48 1.1722% 5.65 148.61 252.46 0 .77 15+41.00 505 6021 .50 6025 .76 6026.67 1.2403% 7.8 1 75.39 58.0 1 0.83 16+56.00 505 6026.33 6029.47 6030.21 1.9439% 6 .94 74 .97 57.74 0 .98 17+52.00 505 6028.16 6032 .31 6033.52 1.9457% 8.85 57 .08 24.06 1.01 18+30.00 505 6031 .10 6036 .09 6037.57 2 .1131% 9.78 51.66 17.46 1.00 18+80.00 505 6032 .13 6037.57 6038.24 0 .745 1% 6.58 76 .75 23.05 0 .64 19+80.00 505 6033.47 6038 .37 6039.04 0 .8496% 6.57 76 .98 27 .29 0 .68 20+80.00 505 6035.44 6039 .67 6041 .00 1.9593% 9 .27 54.47 20.68 1.01 2 1+80.00 505 6038 .08 604 1 .67 6042.16 0.6728% 5.60 90 .22 34.54 0 .61 23+80.00 505 6047 .17 6050 .98 6052.10 1.9350% 8.51 59.36 27.76 1.01 25+80.00 505 6057.65 6061.58 6062.04 1.1 399% 7.10 130.16 128.69 0 .77 27+80.00 505 6062 .56 6067.49 6068.75 1.9776% 8.98 56.23 31.04 1.01 29+80.00 505 6070.22 6074 .21 6075.30 2 .0446% 8 .39 60.2 1 28.05 1.01 3 1+80.00 505 6084.24 6090.16 6091.65 2 .1 574% 9 .79 51 .58 17.44 1.00 33+80.00 505 6096.80 6100.59 6101.65 1.9769% 8.25 61.18 29.57 1.01 34+80.00 505 6 102 .80 6 107.01 6108.11 1.9478% 8.41 60 .15 30.17 1.01 'URSwas hington Division 29454-000 96 of 100 Rev .C Chevron 11111 CHEVRON NORTH AMERICA EXPLORATION AND PRODUCTION COMPANY 2. TABLE N0.1 HEC-RAS OUTPUT-DEVELOPED CONDITION River Q-100 Min. w.s. E.G . E.G. Chan. Flow Top Chan. Station Total Chan. Elev. Elev. Slope Vel. Area Width Froude El. (cfs) (ft) (ft) (ft) (%) (ft/s) (sq ft) (ft) No. 0+00.00 505 5974 .00 5983.00 5983.00 0.0011% 0 .50 1449.38 225.00 0.03 0+30.00 505 5974.20 5982.99 5983.01 0.0129% 1.20 562.57 148.75 0.09 0+87.00 505 5978.22 5984.85 5985.15 0.9194% 5.76 168.68 225 .00 0.63 1+40.00 505 5979.77 5986.24 5986.69 1.2161% 5.70 118.51 198.75 0 .75 2+99.00 505 5984.90 5989.29 5989.85 1.2589% 6.79 106.90 93.26 0.80 3+59.00 505 5986.39 5989.98 5990.66 1.3456% 6.65 78.42 54.06 0 .83 4+48.00 505 5988.51 5992.79 5993.78 1.9904% 7.96 63.46 33.18 1.01 5+86.00 505 5991.78 5995.48 5996.60 1.9345% 8.47 59.60 27.21 1.01 7+52.00 505 5995.33 5999.67 6000.87 1.9363% 8.77 57 .55 24.42 1.01 7+87.00 505 5997.00 6000.85 6001 .27 0 .5378% 5 .21 96.84 35.13 0.55 8+34.00 505 5999.00 6001.69 6002.57 2 .8613% 8 .26 68.59 40.14 1 .16 8+56.00 505 5999.50 6002.60 6003.72 1.8135% 8.48 60.17 28.68 0.99 8+65.00 505 5999.50 6003.29 6005.21 0.4633% 11.09 45.53 12.00 1.00 9+29 .90 NEW 12' X 5' R.C. BOX CULVERT 9+30.00 505 6000.00 6005.85 6006.65 0.1410% 7.19 70.21 12.00 0.52 9+40.00 505 6006.00 6007.83 6008.66 1.5598% 7.32 69.00 41.74 1.00 9+65 .00 505 6006.00 6008.38 6009.30 1.5050% 7.69 65.94 37.80 1.01 10+15.00 505 6008.00 6009.92 6010.21 1 .0207% 4.39 117.40 105.02 0.69 10+82.00 505 6008.50 6011.68 6012.12 1.0623% 6.77 132.38 132.87 0.77 12+79.00 505 6013.70 6016.79 6017.78 1.9566% 7.95 63 .49 32.73 1.01 14+25.00 505 6020.80 6023.14 6023.73 1.5288% 6.55 94.01 81.42 0 .88 15+41.00 505 6021 .50 6025.70 6026.69 1.3702% 8.09 69.32 47.15 0.87 16+56.00 505 6026.33 6029.68 6030.54 1.6243% 7.51 72.26 51.31 0.93 17+52.00 505 6028.16 6032 .47 6033.69 1.9438% 8.85 57.05 23.92 1.01 18+30.00 505 6031.10 6036.08 6037.57 2.1252% 9.80 51 .54 17.45 1 .00 18+80.00 505 6032.13 6037.57 6038.24 0.7436% 6.58 76.81 23 .06 0 .63 19+80.00 505 6033.47 6038.37 6039.04 0.8492% 6.56 76.99 27.30 0.68 20+80.00 505 6035.44 6039.66 6041.00 1.9603% 9.27 54.46 20.68 1.01 21+80.00 505 6038.08 6041.67 6042.16 0.6728% 5.60 90.22 34.54 0.61 23+80.00 505 6047.17 6050.98 6052.10 1.9350% 8.51 59.36 27.76 1 .01 25+80.00 505 6057.65 6061 .58 6062 .04 1.1399% 7 .10 130.16 128.69 0.77 27+80.00 505 6062.56 6067.49 6068.75 1.9776% 8 .98 56.23 31 .04 1 .01 29+80.00 505 6070.22 6074.21 6075.30 2 .0446% 8.39 60.21 28.05 1 .01 31+80.00 505 6084.24 6090.16 6091.65 2 .1574% 9 .79 51.58 17.44 1 .00 33+80.00 505 6096.80 6100.59 6101.65 1.9769% 8 .25 61.18 29.57 1.01 34+80.00 505 6102.80 6107.01 6108.11 1.9478% 8.41 60.15 30.17 1.01 tJRSwashington Division 29454-000 97 of 100 Rev.C -------""' ii Midcontinent I Alaska SBU Chevron North American Exploration and Production Company m:l.'1.Cr ~~ 'DRS 1 • 0 • Washington Division nLL.Wr t'.ll(I 7~Eit<:I l li1o•Avl'ou.,, s..111 .. i oo QI ~CXI ~.Cob'&Jo00Zl7 "'CJDJ• I w.m I Picea nce Basin Development l e.Ill: .. ..._ Central Production Facili ty Floodplain Modifications II~ PBSR-59836AVF-CIV-R PT-00000 -00001-0 1 I u TOM CREEK FLOODPLAIN MAP 100 iiE z-----K 75 25 50 0 SCALE IN FEET 100 EW 100-YEAR FLOODPLAIN LIMITS ~~~~ ~~~/ ~:r,.\~~~ .. ;i~~~-~--NEW 1 2XOB~X-CULVE RT-/~./ J ~ __.. -REPLACES EXISTING ./ r .- 60" CMP CULVERT ST A 8+56 .... ~· STA8+34 •' STA 7+87 • CENTRAL PRODUCTION FACILITY SITE EXISTING 100-YEAR FLOODPLAIN LIMITS WITH LIMITS OF FIELD SURVEY DATA NOTE: SEE ATTACHED CROSS SECTIONS FOR LIMITS OF THE EX ISTING & DEVELOPED 100-YEAR FLOOD PLAIN LIMITS LEGEND / ~ / ~ ,.,- / / / --6010-_ / -6010 - EXISTING CONTOUR PROPOSED CONTOUR / ) N 7 RC IE SI DISCIPl.111£ 8T DAI[ ISSU£D ll[CHANICAL IULUR PRCL llllNART PIPING ENVIRON. PROCESS GEN . ARRANG. DA I DC HYAC SIRUCllJIAL a=.::.::::::__~-+--+:.=:=--+--1--~--~----------------1--+-+-~APPROYEDrM a=::....:::=::+--+--+::..:.....:::..._.+--1--~--~----------------I--+-+-~ C(JiSIRUCllON I I REY DAI£ SOE PEii I & C 11111 APPROYED rM CONSIRUCllON !KESS SIGl€D i-:-::'--'--~-1----1-----1---1---1--4---1------------------1--+--+---f & DAIED. Dt:SIROT ALL PlllNIS SURING URL IER DAIE &/M R(V,111). 6 5 4 3 FOR ILLUSTRATION ONLY LEGE ND -Prima ry fl ood w ay a rea -hi g h ve locity In e ffective fl ow a rea -reduced veloci t y DflAINI DAIE I CR 05 -06-08 CHECKED 1 OAIE 1 SCAL[I AS SHOWN ChlVl'lln ........... Mi dContinent / Alaska SBU ~ Chevron North America llliiill E xploration and Production URS Weshlneton Division 10550 RicMIOnd Ave. -HoustC11 . IX 77042 -128 1 I 529-3100 PICEANCE BASIN OEVELOPt.ENT CENTRAL PRODUCTION FACILITY PAO EXISTING CONDITIONS PBSR~· 59836AV F·CIV-RPT-URS-00000-0000 1-02 R{V 2 -····-1\C~ .. --.. ·-·-... -........... . 1 D c B A CNAEP March 13, 2008 URS -Washington Division c/o Sally Cuffin 7800 E. Union Avenue, Suite 100 Denver, CO 80237 Garfield County BUILDING & PLANN I N G DE PARTMENT Re: Request for a Special Use Permit for an Industrial Support Facility (Central Production Facility) in the RL zone district for Chevron USA, Inc. Dear Ms. Cuffin, As you are aware, on Monday March 10, 2008, the Board of County Commissioners approved a Special Use Permit for an "Industrial Support Facility" located approximately 12 .5 miles north of the Town of DeBeque off County Road 211 . The Special Use Permit was approved with the following conditions: 1. That all representations of the Applicant, either within the application or stated at the hearing before the Board of County Commissioners, shall be considered conditions of approval unless explicitly altered by the Board . 2. The Applicant shall comply with all standards as set forth in §5 .03 .08 "Industrial Performance Standards" of the Garfield County Zoning Resolution of 1978 as amended and included here as follows : a. Volume of sound generated shall comply with the standards set forth in the Colorado Revised Statutes . b. Every use shall be so operated that the ground vibration inherently and recurrently generated is not perceptible, without instruments, at any point of any boundary line of the property on which the use is located . c. Emissions of smoke and particulate matter: every use shall be operated so as t o comply with all Federal, State and County air quality laws, regulations and standards. d. Every use shall be so operated that it does not emit heat, glare, radiation or fumes which substantially interfere with the existing use of adjoining property or which constitutes a public nuisance or hazard . Flaring of gases, aircraft warning signals, reflective painting of storage tanks, or other such ope rations which may be required by law as safety or air pollution cont rol measures shall be exempted from this provision . e . Storage of flammable or explosive solids or gases shall be in accordance with accepted standards and laws and shall comply with the national, state and local fire 108 Eig hth St reet, Suite 401 •!Glen wood Sp rings, CO 81601 (970) 9 45-821 2 • (9 70 ) 285-7972 •Fax: (970) 384-34 70 codes and written recommendations/comments from the appropriate local protection district regarding compliance with the appropriate codes. f. No materials or wastes shall be deposited upon a property in such form or manner that they may be transferred off the property by any reasonably foreseeable natural causes or forces. g. Any repair and maintenance activity requiring the use of equipment that will generate noise, odors or glare beyond the property boundaries will be conducted within a building or outdoors during the hours of 8 a.m. to 6 p.m., Mon.-Fri. h. Loading and unloading of vehicles shall be conducted on private property and may not be conducted on any public right-of-way. i. Any storage area for uses not associated with natural resources shall not exceed ten (10) acres in size. j. Any lighting of storage area shall be pointed downward and inward to the property center and shaded to prevent direct reflection on adjacent property. 3. That the operation of the facility be done in accordance with ·all applicable federal, state, and local regulations governing the operation of this type of facility. 4. That the Applicant shall comply with the fire protection provisions included in the rules and regulations of the Colorado Oil and Gas Conservation Commission (COGCC) and the International Fire Code as the Code pertains to the operation of this facility. 5. The total area of disturbance shall not exceed 21 acres in size. The Central Production Facility and Flare Safety Zone at completion shall have a footprint no larger than 8.5 acres. The temporary borrow area shall not exceed 12.5 acres (8.0 acres for borrow area and 4.5 acres for topsoil storage). 6. That all proper building permits and ISDS permits are obtained for the structures and wastewater disposal systems, including vault-and-haul systems, associated with the operation of the Central Production Facility. 7. Sewage systems shall to be installed and maintained in accordance with the Garfield County ISDS regulations with all pipes and connections water tight and lids kept securely in place at all times except during normal cleaning operations. 8. The facility shall have a minimum total capacity of 6,050 gallons of potable water storage which shall be refilled a minimum of every three days in connection with 1.4 acre temporary storage (staging) area. These tanks shall be removed at the point that the flare is operational and the lay down yard (Staging Area) is decommissioned. The permanent Control Building shall be connected to a permanent water supply system. 9. The facility shall have a minimum total capacity of 3,025 gallons of potable water storage capacity which shall be refilled a minimum of every three days from either well water produced on the subject property as demonstrated within this application or from water purchased from a water supplier in connection with the permanent Control Building. 2 10. The facility shall have a minimum total capacity of 8,060 gallons of sewage and wastewater storage capacity which shall be emptied a minimum of every three days. These tanks shall be removed at the point that the flare is operational and the lay down yard (Staging Area) is decommissioned. The permanent Control Building shall be connected to the ISDS and shall not be served by sewage vault tanks. 11. Wildlife-proof refuse and/or recycling containers must be provided for trash. At least one thirty (30) cubic yard container shall be provided for the facility. Said container(s) must be durable, washable, non-absorbent metal or plastic with tight-fitting lids. Refuse shall be disposed of not less than once weekly. 12. All equipment and structures must be painted in accordance with the BLM Gold Book standards. 13. The Applicant shall treat the gravel surfaces within the facility periodically as needed with an approved dust suppressant to control fugitive dust. 14. The Applicant shall have six (6) months from the date of issuance of the Special Use Permit for Chevron USA Inc. to obtain and be approved for the Synthetic Minor permit from CDPHE. If Chevron USA, Inc. fails to obtain a permit within the specified timeframe, the permit is denied by CDPHE, or the conditions of the permit modify the site plan as approved under this Special Use Permit, the approved Special Use Permit from Garfield County shall become null and void. At this point, Chevron USA, Inc. will need to reapply for a new Special Use Permit from Garfield County for this facility. 15. The Applicant is required to submit a final noise study for the proposed facility which indicates that the facility will not cause noise levels which exceed the state statute. This study is also subject to Condition 26, below. If the facility does not conform to the State statutes regarding noise generation, the applicant will need to submit a plan for mitigating this noise. If this mitigation plan requires amendments to the submitted and approved Special Use Permit or any representations made the Applicant however, the Applicant shall submit for a new Special Use Permit from Garfield County for this Central Production Facility. 16. All construction and operation of the site shall occur in accordance with the Storm Water Management Plan (SWMP) as submitted. In addition, as represented in the application, Chevron USA Inc. shall conduct bi-weekly SWMP inspections to ensure site stabilization measures are adequate and/or identify areas that need repair or improvement. 17. All construction and operation of the site shall occur in accordance with the most up-Io- date SPCC plan for this site. 18. The embankments adjacent to the floodplain limits shall have rip-rap slope protection in order to prevent erosion on the embankment slopes. 19. The Applicant shall.submit an approved and adequate well permit to serve the permanent control building prior to issuance of the Special Use Permit. In order to maintain consistency with the proposed ISDS, this well permit shall be adequate in terms of rights and quantity to serve a workforce of up to ten (10) employees. 3 20. The Applicant shall submit a new Integrated Vegetation and Weed Management plan which incorporates that area which is to be disturbed by the proposed Central Production Facility. This plan shall be reviewed and deemed adequate by the Garfield County Vegetation Management Department prior to issuance of the Special Use Permit. The Applicant shall submit this plan by June 1, 2008, shall NOT grade or disturb any portion of the subject site prior to the Integrated Vegetation and Weed Management plan's review and acceptance by the Garfield County Vegetation Management Department and shall incorporate a soil "ripping" process into this revegetation and rehabilitation plan. 21. Before leaving the approved site, all off-road major construction equipment (graders, dozers, etc) working in areas of mapped noxious weeds shall be power washed to remove seeds, soil, and vegetative matter. 22. The Applicant shall provide a security for revegetation in the amount $31,250 to cover the estimated 12.5 acres to be disturbed prior to issuance of the Special Use Permit (using a rate of $2500 per acre for a facility that may be in place for up to one year). The security shall be held by Garfield County until vegetation has been successfully reestablished according to the Reclamation Standards in the Garfield County Vegetation Management Plan. II is the responsibility of the applicant to contact the County, upon successful revegetalion establishment, to request an inspection for security release consideration. The monetary amount of the revegetation bond may vary from the amount specified above as it is dependant the revaluation of the new materials submitted on March 7, 2008 (See Condition 25, below). The applicant shall provide the Vegetation Management Department with the original tags from each seed bag. The seed mix in the Plan shall match the seed mix used in the field. Do not use a seed mix containing yellow sweet clover (Melilotus offcinalis) or annual yellow sweetclover (M. indicus). The amount of seed specified to be planted in the Plan shall match the quantity of seed used in the field. 23. The Applicant shall provide a security for revegetation in the amount $34,000 to cover the estimated 8.5 acres to be disturbed prior to issuance of the Special Use Permit (using a rate of $4000 per acre for a facility that may be in place for up to twenty (20) years). The security shall be held by Garfield County until vegetation has been successfully reestablished according to the Reclamation Standards in the Garfield County Vegetation Management Plan. It is the responsibility of the applicant to contact the County, upon successful revegetation establishment, to request an inspection for security release consideration. The monetary amount of the revegetation bond may vary from the amount specified above as it is dependant the revaluation of the new materials submitted on March 7, 2008 (See Condition 25, below). The applicant shall provide the Vegetation Management Department with the original tags from each seed bag. The seed mix in the Plan shall match the seed mix used in the field. Do not use a seed mix containing yellow sweet clover (Melilotus offcinalis) or annual yellow sweetclover (M. indicus). The amount of seed specified to be planted in the Plan shall match the quantity of seed used in the field. 24. Any straw or hay bales used in erosion control shall be certified weed free. 25. An updated Soil Management Plan, Noxious Weed Plan, Revegetation Plan, Revegetation Bond, and Storm Water Management Plan shall be submitted based on the changes to 4 the application dated received March 7, 2008 (Exhibits N through R). These updated plans shall be reviewed and accepted by the Garfield County Vegetation Management Department and the Applicant shall comply with all requirements of the Vegetation Management Department prior to issuance of the Special Use Permit. 26. An updated Sound Study shall be submitted based on the changes to the application dated received March 7, 2008 (Exhibits N through R). These updated plans shall be reviewed and accepted by the Garfield County Planning Department and the Applicant shall comply with all requirements of the Planning Department prior to issuance of the Special Use Permit. 27 . An updated Erosion Control Plan , Grading Plan and Storm Water Management Plan shall be submitted based on the changes to the applicat ion dated received March 7, 2008 (Exhibits N through R). These updated plans shall be reviewed and accepted by the Garfield County Engineer and the Applicant shall comply with all requirements of the Eng ineer prior to issuance of the Special Use Permit. 28. The Applicant shall submit and be approved for a Floodplain Permit from Garfield County prior issuance of the Special Use Permit. Please address all issues which are identified as needing attention prior to the Board of Coun ty Commissioners Hearing . Sincerely, David Pes c Senior Planner (970) 945~8212 5