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Home My WebLink AboutOWTS DesignLKP Engineering, Inc. CIVlL/CEOTECHNICAL January 6,2022 Kevin L. Patrick 0197 Prospector Road, Suite 21044 Aspen, Colorado 8l6l I (970) 920. I 030 u{! a :ryþrb! ras.!:lluts ¿ rJ RE: Soil and Site Evaluation OWTS - 3 Bedroom Residence Account R008776, Parcel 239 I 3040500 I 1002 Skipper Drive, Carbondale, CO 8l 623 Lot l, Stirling Ranch PUD Garfìeld County, Colorado Project l{o.21-3550 Dear Kevin, On Septemb er 2, 2021 , we visited your property on Lot I , Stirling Ranch PUD, at I 002 Skipper Drive, Carbondale, CO 81623, in Garfield County, Colorado.'lhe purpose of our site visits was to select an area on the property l'or the proposed Soil Treatment Area. During the site visit, your excavator Ryan lvy, dug two profile holes. The OWTS is for a proposed 3-bedroom residence. It will consist of a 1O00-gallons, three-companments concrete septic tank by Valley Precast with an effluent filter, and an Orenco Pump assembly, and the Soil Treatment Area will consist of 60 Quick 4 Plus, Standard Infiltrator Chambers in a bed configuration with a 3-foot sand filter and pressure dosing. The site plan by Amos Underwood, PBR Workshop, and the information provided during our telephone conversation today with you, were used as basis for the septic system design. Directions to the site from the Carbondale exit on CO-82 are as follows: continue East on CO-82 for 3.8 mi to Catherine Store Road, turn left on Catherine Store Road, continue for 2.3 mi turn right on Co Rd I 02, right on La Casita Road, right on Skipper l)rive, continue to the end of the road. The lot is accessed via access easement west from the Skipper Drive cul-de-sac. Prelim inary Investigation tr Address: 1002 Skipper Drive, Carbondale, CO 81623, tr Legal Description: Lot I, Stirling Ranch PUD, Garfield County, Colorado. n Existing Structures: There were no existing structures on lhe lot. n Location of existing and proposed wells on properfy: There are no wells on the property. It is services by public water, ! Garfield County Environmental Health Department records: There were no old record. The properly was vacanl. Topography: The topography of the leacffield site is moderate with an overage slope of about I to 2 percent. Draínage is to the west. ö P.O. Box 724,F.agle, CO 81631 Tel. 970-390-0307 wwW..l,KPEngineçr'ins.cor¡ Patrick Res- 1002 Skipper Drive January 6,2022 Page 2 of 4 Project 2f-3550 O !Soil Data: The proJìle holes were observed an August 10, 2021. The soil exposed in the profile holes was asþllows: PraJile \Iole ltl 0 to L0îeet topsoil 1.0 to 6 feet whitish, sandy, silty clay with some cobbles No ground water encountered Prrúìle fk¡le No, 2 0 to 1.0 feet topsoil with roots 1.0 to 1.5 feeÍ blocþ clay 1,5 to 4 feet whitish, sandy, silty clay with cobbles and boulders No ground water encountered A soil sample takenfrom Profile Hole I at 4B-inches was classified as Type 3, LTAR:0.35 gpd/sf CLAY LOAM, Due to large boulders and cobbles in ProJìle hole 2, 3 feet deep sandfilter and pressure distribution is recommended. ¡ Location of applicable setbacks in Tablc 7-1 Reconnaissance ¡ Landscape position: The proposed STA will be located in the Summit/Shoulder Slope Position northwest from the proposed residence (down gradient) n Topography: The topography o.f the proposed leachJìeld site is relatively flat. The rows of infiltrators in the bed will run along the contours. ¡ Vegetation: The vegetøtion within the proposed leachfield site consisted of sparce wild grass, cacti, sage brush and juniper trees. There were also basalt rocks on the surface. The site surrounding lhe leachfield was similar. ! Natural and cultural features: According to the Stirling Ranch Website: "The ranch is located on a high mesa overlooking the Roaring Fork Valley called Missouri IIeights. Missouri Heights was settled back in the I800's by ranching pioneers, They planted potatoes, hay, wheat, ulfalfa and barley, and raised beef cattle and sheep. Thst is still the case Jitr a few ranche.s today. The plateau is dotted by old potato cellars and school houses. The historic Missouri Heights Schoolhouse, neqr Stirling Ranch's entrance, hosts meetings and events." P.O. Box 724,Eagle,CO 8163 I Tel. 970-390-0307 rvr¡,rv.l-KI)l'.ng.c()lll Patrick Res- 1002 Skipper Drive January 6,2022 Page 3 of 4 Project 2l-3550 a a ! Current and historic land use: The current use is residential and ranching. Prior use was ranching. Detailed Soil Investigation ! Visual and tactile evaluation of two or more soil profile test pit excavation; Two profile holes were dug, observed and logged and visual and tactile evaluation test was done. n Percolation tests plus one or more soil profile holes or one or more profile test pit excavations: Three profile holes were observed and logged on September 2,2021. Report and Site Plan n Name, address, telephone number, email address, and credentials and qualification of individual who conducted site evaluation: This site evaluationwas completed by Luiza Pelrovska, PE, of LKP Engineering, Inc. LKP Engineering, Inc., is located at 67 Robins Egg Lane, Eagle, Colorado. The phone number is 970-390-0307 and Luizak email is I U! ç ct (i ültU e ttg*;sy I Dates of preliminary and detailed evaluation: September 2, 2021 . ü A graphic soil log, to scale: Attached ! Setback distances in Table 7-l: ! Main House Well Potable waler Structure with basemenl Struclure wlo basement PL Lake Surface Water Intermiltent Irrigation laleral Septic Tank Tank n/a -'tu >J n/a -35'NPL rua n/a STA n/o >21 >20 n/a -49'NP L n/a n/a -85 Setback distances in Table 7-2: Items l-4, observed. No groundwster encountered. A drawing (to scale) with complete property boundary lines on minimum of 8.5 x 11" Label profile test pits/hroles North Arow Graphic scale Horizontaland vertical reference points of proposed STA Contours OR slope direction and o/o slope Location of any visible or known unsuitable, disturbed, or compacted soils r The proposcd clcvation of thc infiltrative surface of the STA from benchmark or ground surface Anticipated construction related issues: Large, basalt boulders n I-J P.O. Box 724,Eagle, CO 81631 Tel. 970-390-0307 ulvw.l-Kf'l1níìus!&..q!Il Patrick Res- 1002 Skipper Drive January 6,2022 Page 4 of 4 Project 21-3550 LI(P Engineering,Inc. Luiza Petrovska, PE Enclosure J:\ WP X4-LKP\ 2021\21-35505OIL-SITE-EVAL-BED-PRESS-3FT"SAND.DOCX n Assessment of known or foreseeable land use changes expected to affect the system performance: None known. tr Narrative explaining difficulties encountered during site evaluation: none The graphic soil log is appended to this report. P.O. Box 724, Eagle, CO 8 1 63 1 Tel. 970-390-0307 l.vww.[.KPEneineerins.com Proflle Hole f, 1DATE OBSER\ED: September 2,2O21 EL"EVATION: s Y Hg o L s A M P L E DESCHPNON OF UAIERIAL AND SAMPLE LOCANOI,I LABORAfORY TEST FESU¿IS DEPfH FEET RENARKS I Topsoil Ulhitish, sond¡4, silty-cloy wÍth some cobbles, at 48" CLAY LOAM, Type 3 No Ground lloter Encountered _10 - ,t5 _20 ı Refusol @ 6 feet Landscape Positìonr Summ¡t/Shoulder Slope Shape: LL Vegelation: juniper trees, cacti, sage, grass, basalt rocks Shape: prismat¡c, blocky Grãde: moderÊte Consislence: friable, firm \Type 3, LTAR = 0.35 gpd/sf <35% Rock (>2mm) equally grilty and smooth, 1"-2" r¡bbon I.EGEND: tr - 2-lnch O,D. Cøllfomlo Líncr SompleI - Bulk SomplcDD - Notural Dry Dcnslty (pcf) UC - Noturol Hotature Contcnt (Í) -200 - Percqnt Posslng No, 20O SlevcU - Llquid LímltPl - Plosticity lndcxeY( - Ground woter ?aæor tat 2''-3550IJ(P ENGINEERING, INC.ST'BST'RFACE EXPTORATION tOG tnEm..Prof-l Profile llole f, 2DA'IE OBSER\ED: Scptomber 2, 2021 ELEVATION: DESCRPNON OF UAIERIAL AND SAIIPLE LOCANON LABORATORY 'EST RESU¿TS REMARKSDEPIH FEET s Y M B o L s A ,t P L E Topsoíl Blocky clay ll/hitish, sílty, cobbles ond cloy withsondy, boulders No Ground F/oter Encountered Landscape Posit¡on: Suñr'nit/ShouldÞr Slope Shape: LL Vegetat¡on: juniper trees, cact¡, sage, grass, basalt rocks Shape: prismalic, blocky Grade: moderate Consistence: friable, firm -t0 _tã _20 Refusol @ 4 feet on bouldets - 2-lnch O.D. Callfomlo Llner Sømple - Bulk Sømple - Noturot ùry Denstty (pcf) - Noturol Moísturc Contcnt (Z) - Pcrccnt Possîng No. 200 Sicw - Llquld Lîmlt - Plostlclty lndex - Cround voter I.EGEND: tr T DO MC -200u PI GW tmruTmt 2t-J550 'NFß.Prof-2ST'BSURFACE EXPIORATION IOGI¡(P ENCINEERING, INC. Pump Selection for a Pressurized System - s¡ngle Fam¡ly Residence Projsct 2l-3550 Pâtrick I 1002 Skipp€r Drive, Carbondale Pârâmsterc 160OlschaEs Assenbly s¡zo fránspod Lerglh franspol Pipc Cl¡F lrán3pod Line S¡¿e Dislr¡bul¡n0 Valv8 ModBl i/lâ¡ Elevat¡on Lin Måñifob L8f,gl¡ Manlfold Pipe class Msn¡fold P¡pè si¿ê Nunbea ofLale¡els psr cell Lal€r¿¡ LÊn0h Leleral Pips Cl€ss Lalcrel Pipc Sìzc O¡ince Sizo Or¡licô Spaclng Residual Hoad Add-on' F.iclion Losses 2.00 inchês 9g feel 40 1.50 inchos Non6 5 ioet 8.5 tuot 40 l-50 inches 62 leel 10 1.50 iîches 118 inches 4 fô€t 5 bol Nons inches 0 fest Calculai¡ons o(¡,l!rclt- d(! 0,¡ .9 Eo ô 6 oþ Mif,imum Flow Rale perorifce Numbsr olOr¡lì@s per Zone lolål Flow Rale per Zone Number of Lålsr¿ls FrZone % Flow Olffoîenl¡al lsl/Lasl OrlBæ Tmnspol Veloc{y 013 04 271 o7 44 gpñ 9pm lps Fr¡ctlonal Hoed Loss6s Loss lhrough Disoharue Loss ìn lr¿nspod Loss throloh Valw Loss ¡n M¿n¡fold Loss in Lâtefåls Loss ih¡ough Flowmeler 15 43 00 0Í 0t 00 oo lsel ¡esl leet feet lesL leâ¡ Pipe Volumes Vol oftanspo( LinÊ Vol of Msnlfold t02 09 262 g¿b gsb oåE gabfolal Volume ?0 PuñpD¡ta M¡nimum Pump Oesion Flow Rale Tol¿l Dynåmic Head 16 1 0pm feel 10 20 30 40 Net Oischarge (gpm! 60 70 Legond sysl€ruufve: PurìLçuNe: Pump Oplima¡¡a¡qe: opereli@o¡nl: ûesrfto¡nl: 80 PFsoo5 H¡gh Head Eílùenl P!mp 50 GPM, 1/2HP 115123OV 1ø 60H2, 200t2aOV Xø øoqz @C,rencoffi -a;:== iåt¡li¡AtÉ-.'*¡:*J r-!tli!r:ts NotraSs Y 560.,1w{{,-lsi.T." 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