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HomeMy WebLinkAboutEngineer's OWTS Design PlanHuddleston-Berry Engineering & Testing, LLC February 3,2025 Project#O1303-0106 Clayton Homes 671 23 Road Grand Junction, Colorado 81505 Attention: Mr. Trent Bubar Reference OWTS Design 314 Coryell Ridge Glenwood Springs, Colorado Geotechnical Investigation, 314 Coryell Ridge, Glenwood Springs, Colorado by Huddleston-Berry Engineering & Testing, LLC for Trent Bubar, November 27, 2024. 2789 Riverside Parkway Grand Junction, Colorado 81501 Phone: 970-255-8005 Info@huddlestonberry.com Subject: Dear Mr. Bubar, At your request, Huddleston-Berry Engineering & Testing,LLC completed design of an Onsite Wastewater Treatment System (OWTS) for a new single family residence at 314 Coryell Ridge in Glenwood Springs, Colorado. The site location is shown on Figure I - Site Location Map. A site plan is included as Figure 2. Site Description At the time of the investigation, the site was occupied by an existing residence and miscellaneous piles of debris. The topography at the site consisted of slight to moderate slopes down to the north. Site topography is shown on Figure 2. Vegetation primarily consisted of grasses and weeds. The site was bordered to the west and east by residential properties, and to the north and south by Coryell Ridge Road. Subsurface Investisation In order to evaluate the subsurface conditions, four test pits were excavated in the vicinity of the proposed new structure and Soil Treatment Area (STA). Using visual-tactile classification methods, the soil profile consisted of 1.0 foot of topsoil above tan to brown, moist, medium dense silt loam with gravel soils with a moderate granular structure that extended to the bottoms of the excavations. The site soils are consistent with Soil Type 2 with less than 35olo rock. Groundwater was not encountered in the subsurface at the time of the investigation. In general, based upon the results of the subsurface investigation, HBET believes that the seasonal high groundwater elevation is deeper than 7.0 feet below the existing grade at this site. The locations of the test pits are shown on Figure 2. Copies of the test pit logs are included in Appendix A. 314 Coryell Ridge #0 r 303-01 06 02/03t25 Onsite Wastewater Treatment Svstem Huddleston-Berry f, .tiderld!& T.rrht! l.l.C Seepage Bed Design The design of the absorption system generally follows the requirements of the Garfield County Department of Public Works as outlined in the Garfield County On-Site Wastewater Treatment System Regulations, effective July 2018. The proposed construction at the site is anticipated to include a three bedroom home. Based upon the visual tactile classification of the soils, a Long-Term Acceptance Rate (LTAR) of 0.6 will be utilized for the absorption field design. Infiltrator Systems Quick4 Standard Chambers are proposed. The daily flow of the sewage disposal system is calculated below and a plan and profile of the absorption system are shown on Figure 3. Average Daily Flow = (6 persons)(75 GPD/person) = 450 GPD Soil Treatment Area: (450 GPD / 0.6;: 750 Square Feet Adjusted Soil Treatment Area = (750 SFXI.2X0.7) = 630 Square Feet # of Quick4 Chambers : (630 I t21= 53 Chambersl Use 56 Chambers System Installation The installation of the septic tank, plumbing lines, Infiltrators, etc. should be completed in accordance with the Garfield County On-Site Wastewater Treatment System Regulations and Infiltrator Systems, Inc. specifications. In addition, the following construction procedures are recommended: ' The septic tank and distribution box should be placed level over native soils that have been scarified to a depth of 8 to 12 inches, moisture conditioned, and recompacted to a minimum of 95o/o of the standard Proctor maximum dry density, within +2o/o of optimum moisture content. However, up to 3-inches of washed rock or pipe bedding passing the l-inch sieve may be used as a leveling course under the septic tank andlor distribution box. ' The bottoms of trenches and backfill around the septic tank and distribution box which will support sewer or effluent lines should be compacted to at least 90 percent of the standard Proctor maximum dry density, within +2%o of optimum moisture content. Pipe bedding should have a maximum particle size of I -inch. ' Vehicular or heavy equipment traffic and placement of structures should not encroach within l0 feet of the septic tank or distribution box. Inspection Schedule Huddleston-Berry Engineering & Testing LLC should be retained to monitor the construction of the OWTS. The following schedule of observation and/or testing should be followed: ' Observe the absorption bed excavation prior to placement of Infiltrator chambers. ' Observe placement of the septic tank, distribution box, and all connecting sewer and effluent lines prior to backfill. Verify proper fall between inverts. ' Observe and verify installation of the absorption bed prior to placement of cover and backfill. 2V:\2008 ALL PROJECTS\01303 - Clayton Hones\0| 303-0106 I 14 Coryell RidgeU0O - cs\01 303.0106 OWTS020325.doc 314 Coryell Ridge #0r303-0106 02/03/25 In conformance with Garfield County regulations, HBET will be required to provide the Garfield County Health Department with documentation certiffing that the OWTS was placed in conformance to the plan and profile and Garfield County regulations. General Notes The OWTS design was based upon the results of the subsurface investigation and on our local experience. The design is valid only for the proposed construction. We are pleased to be of service to your project. Please contact us if you have any questions or comments regarding the contents of this report. Respectful ly Subm itted : Huddleston-Berry Engineering and Testing, LLC Wayne D. Anderson, P.E. Project Engineer ,,A\ @ Huddleston-Berry trntineilnt&lt!ildt, I.t.C JV:\2008 ALL PROJECTS\o1303 - Claylon Homes\o13034106 314 Coryell Ridge900 - Gw\01303-0106 OWTS020325.doc FIGURES APPENDIX A Typed Test Pit Logs Hrddleston-Berry Engineering & Testing, LLC 2789 Riverside Parkway Grand Junction, CO 81501 970-255-800s TEST PIT NUMBER TP-1 PAGE 1 OF 1 PROJECT NUMBER PRO,ECT LOCATION RidoeCUENT Clavton PRO.JECT I{AME 3,I4 TEST PITSIZE CHECKEDBY MABLOGGED BY TFC f)ru DATE STARTED 11tAt2t COMPLETED 1118124 NOTES GROUND ELEVATION GROUNDWATER LEVELS: ATTIi'E OF EXCAVANON AT END OF EXCAVANON AFTEREXCAVANON _ EXCAVANON CONTMCTOR CIienI EXCAVAnON METHOD Trackh/Backhoe rFo- UJo O Irn 3e(, MATERIAL DESCRIPTION lrJ o->EFUJ g>t O-->z U) s M- ttE 8s uJu ateFfq=-< 6o>QZ z lr.J o-l-cu9 C)o(L 5tzf Eo UJufFLo Fz IJJFzoo Qr o< OtrF $= tgd 42 F2 uJFzOG a uJz Lr Silt Loam with Organics moderate granular structure (Soil sitr with Gravel, tan to moist, medium 2 < 35% Rock) Bottom of test pit at 5.5 feet. NoN of o I6 Huddleston-Berry Engineering & Testing, LLC 2789 Riverside Parkway Crrand Junction, CO 81501 970-255-8005 TEST PIT NUMBER TP-z PAGE 1 OF 1 PRO'ECT NUMBER PROJECTLOCANON PRO.'ECT]\l,Ai/E RidoeCUENT Clavton 314 EXCAVATION CONTMCTOR CIienI GRoUND WATER LEVELS: TEST PIT SIZE LOGGED BY TEC AT IIME OF EXCAVATION Dru Drv EXCAVATION METHOD NOTES COMPLETED 1118124 GROUND ELEVANON CHECKEDBY MAB AT END OF EXCAVATION AFTEREXCAVANON _ DATESTARTED 1118124 xFA uJo o Fo dJ(, MATERIAL DESCRIPTION UJ 0->EFur 1g(L -1>z o s U^ ttE 8sujt CDU =Flq3d.60><Jz zulG u9 oo 0- E L =EE,o u;eu- 'o-arr) o2>oo Ou a= J- otrFg= o. E;-ix =r1l 42 Fz TJJFzoG'oe> U) TJJz LL Loam with Organics brown, moist, (Soil Type 2 < withLoam tan toGravel, moderate slructuregranular 35o/o Rock) Bottom of test at 7.0 feet. of, F2 o Huddleston-Berry Engineering & Testing, LLC 2789 Riverside Parkway Grand Junction, CO 81501 970-255-8005 TEST PIT NUMBER TP.3 PAGE 1 OF 1 PROJECT NUMBER PROJECT LOCATION PRO.'ECTlilAME 314 Coruell RidnaCUENTClavlnn Hnmcc EXCAVATION CONTRACTOR Client GROUND WATER LEVELS: TEST PIT SIZE Traekh/Bankhoe Drv Dru NOTES GROUND ELEVATION CHECKEDBY MAB ATNME OF D(CAVANON AT END OF EXCAVATION AFTEREXCAVATION _ DATESTARTED 1118124 COMPLETED 1118/24 EXCAVATION METHOD LOGGEDBY TEC IFo- UJo q +8 o MATERIAL DESCRIPTION UJ(L>0(Ful 3gO-- =z(t) s t^ EA 8s UJ E, (,ffeFlAZJ;asoz z lrJ(Lr-cw9 oo0- 5tzf to uJtrlFLo FzulFzoO Or a= o F-F 3=I E0t 42 Fz UJt-z Uro(Jg o uJz IL Silt Loam with (TOPSOTL) brown, moist, (Soil Type 2 < totan medium dense, strudure 35o/ogranular Rock) Silt Loam moderate Boftom of test pit at Foqo 5 cq a 5o o az =fJooTo Huddleston-Berry Engineering & Testing. LLC 2789 Riverside Parkway Grand Junction, CO 81501 970-255-800s TEST PIT NUMBER TP4 PAGE 1 OF 1 PRO.JECT NUMBER PRO'ECT LOCANON PRO.'ECT l.lAIIE 31 Coruell4CUENT Clavlon Homes EXCAVAflON CONTRACTOR Client EXCAVATION METHOD Trackh/Backhoe GROUND WATER LEVELS: AT NME OF EXCAVATION AT END OF EXCAVATION AFTEREXCAVATION _ DATE STARTED 1118124 COMPLETED 1118124 TEST PIT SIZE CHECKEDBY MAB Drv DrvLOGGED BY TEC GROUND ELEVAIION NOTES .E rFo- UJo o IrnIX<Y o MATERIAL DESCRIPTION UJ o.>tFUJ 3gO-I =zU) s E.ul o C) UJ E. auzFl6,3d coo>()= 2 uJItsG ilJ l2 ooI 5 L =Eto UJ tr.fFo 6 Fz lrJFzoo o- J_ o ;-F \=(L F0il 42 o- Fz IIJFzooa lrJz IL Silt Loam with Organics (TOPSOIL) moderate granular structure (Soil Type 2 < 35% Rock) with Gravel, tan to brown, moist, test pit at 6.0 feet. N @N U'f F2 o r co Huddleston-Berry Engineering & Testing, LLC February 3,2025 Project#01303-0106 Clayton Homes 671 23 Road Grand Junction, Colorado 81505 Attention: Mr. Trent Bubar Reference OWTS Design 314 Coryell Ridge Glenwood Springs, Colorado Geotechnical Investigation, 314 Coryell Ridge, Glenwood Springs, Colorado by Huddleston-Berry Engineering & Testing, LLC for Trent Bubar, November 27, 2024. 2789 Riverside Parkway Grand Junction, Colorado 81501 Phone: 970-255-8005 Info@huddlestonberry. com Subject: Dear Mr. Bubar, At your request, Huddleston-Berry Engineering & Testing, LLC completed design of an Onsite Wastewater Treatment System (OWTS) for a new single family residence at 314 Coryell Ridge in Glenwood Springs, Colorado. The site location is shown on Figure I - Site Location Map. A site plan is included as Figure 2. Site Description At the time of the investigation, the site was occupied by an existing residence and miscellaneous piles of debris. The topography at the site consisted of slight to moderate slopes down to the north. Site topography is shown on Figure 2. Vegetation primarily consisted of grasses and weeds. The site was bordered to the west and east by residential properties, and to the north and south by Coryell Ridge Road. Su bsu rface Investisation In order to evaluate the subsurface conditions, four test pits were excavated in the vicinity of the proposed new structure and Soil Treatment Area (STA). Using visual-tactile classification methods, the soil profile consisted of 1.0 foot of topsoil above tan to brown, moist, medium dense silt loam with gravel soils with a moderate granular structure that extended to the bottoms of the excavations. The site soils are consistent with Soil Type2 with less than 35olo rock. Groundwater was not encountered in the subsurface at the time of the investigation. In general, based upon the results of the subsurface investigation, HBET believes that the seasonal high groundwater elevation is deeper than 7.0 feet below the existing grade at this site. The locations of the test pits are shown on Figure 2. Copies of the test pit logs are included in Appendix A. 314 Coryell Ridge #01303-0106 02t03t25 Onsite Wastewater Treatment System Huddleston-Berry I:nsinc.ri{c & I(irirs, l-l,C Seepage Bed Design The design of the absorption system generally follows the requirements of the Garfield County Department of Public Works as outlined in the Garfield County On-Site Wastewater Treatment System Regulations, effective July 2018. The proposed construction at the site is anticipated to include a three bedroom home. Based upon the visual tactile classification of the soils, a Long-Term Acceptance Rate (LTAR) of 0.6 will be utilized for the absorption field design. Infiltrator Systems Quick4 Standard Chambers are proposed. The daily flow of the sewage disposal system is calculated below and a plan and profile of the absorption system are shown on Figure 3. Average Daily Flow: (6 persons)(75 GPD/person) :450 GPD Soil Treatment Area: (450 GPD / 0.6; : 750 Square Feet Adjusted Soil Treatment Area : (750 SFXI.2X0.7): 630 Square Feet # of Quick4 Chambers: (630 / 127:53 Chambersl Use 56 Chambers System Installution The installation of the septic tank, plumbing lines, Infiltrators, etc. should be completed in accordance with the Garfield County On-Site llastewater Treatment System Regulations and Infiltrator Systems, Inc. specifications. In addition, the following construction procedures are recommended: ' The septic tank and distribution box should be placed level over native soils that have been scarified to a depth of 8 to 12 inches, moisture conditioned, and recompacted to a minimum of 95o/o of the standard Proctor maximum dry density, within +2%o of optimum moisture content. However, up to 3-inches of washed rock or pipe bedding passing the I -inch sieve may be used as a leveling course under the septic tank and/or distribution box. ' The bottoms of trenches and backfill around the septic tank and distribution box which will support sewer or effluent lines should be compacted to at least 90 percent of the standard Proctor maximum dry density, within +2%o of optimum moisture content. Pipe bedding should have a maximum particle size of I -inch.. Vehicular or heavy equipment traffic and placement of structures should not encroach within 10 feet of the septic tank or distribution box. Inspection Schedule Huddleston-Beny Engineering & Testing LLC should be retained to monitor the construction of the OWTS. The following schedule of observation and/or testing should be followed: ' Observe the absorption bed excavation prior to placement of Infiltrator chambers. ' Observe placement of the septic tank, distribution box, and all connecting sewer and effluent lines prior to backfill. Verify proper fall between invefts. ' Observe and verify installation of the absorption bed prior to placement of cover and backfill. 2V:\2008 ALL PROJECTS\01303 - Clayton Homes\01303-0106 314 Coryell RidgeUOO - Geo\O1303-0106 OWTS020325.doc 314 Coryell Ridge #01303-0106 02/03/25 ,A@ Huddleston-Berry Eneinc.ring&ltrring, l-LC In conformance with Garfield County regulations, HBET will be required to provide the Garfield County Health Department with documentation certifying that the OWTS was placed in conformance to the plan and profile and Garfield County regulations. General Notes The OWTS design was based upon the results of the subsurface investigation and on our local experience. The design is valid only for the proposed construction. We are pleased to be of service to your project. Please contact us if you have any questions or comments regarding the contents of this report. Respectfully Submitted: Huddleston-Berry Engineering and Testing, LLC Wayne D. Anderson, P.E. Project Engineer aJV:U008 ALL PROJECTS\oI303 - Clayton Homes\oI3034106 314 Coryell Ridseuoo - G@\01303-0106 OWTS020325.doc FIGURES APPENDIX A Typed Test Pit Logs Huddleston-Berry Engineering & Testing, LLC 2789 Riverside Parkrvay Grand Junction, CO 81501 970-255-8005 TEST PIT NUMBER TP.l PAGE 1 OF 1 PROJECT l.lAME 314 Corvell Ridoe PROJECT NUMBER PROJECT LOCATION CLIENT Clavlon Homas AT END OF EXCAVATION Drv AFTER EXCAVATION -- TEST PIT SIZE EXCAVAilON METHOD Trackh/Backhoe CHECKED BY MAB EXCAVATION CONTRACTOR Client AT TIME OF EXCAVATION Drv COMPLETED,I 1/8/24 GROUND ELEVATION LOGGEDBY TEC NOTES GROUND WATER LEVELS: DATE STARTED 1118124 ATTERBERG IF(L uJo 0. o 48dr(, MATERIAL DESCRIPTION tU(L>tF lll -.,t=tO-->2 o s q8 8s [lJt afr?F] XasQZ 2 tJJ(L irr .9 oo(L 5 F^z9f9 uo u;€t- J.ztPro2>o() Qr o= J_ C) F-F 3= 0- tst 42 Fz IIJFzOG()9l a tJJz LL Silt Loam with Organics (TOPSOIL) 5.0 Silt Loam with Gravel, tan to brown, moist, medium dense moderate granular structure (Soil Type 2 < 35% Rock) test pit at 5.5 feet.Bottom al Fz6 JJu tra I m IouF Uo Huddleston-Berry Engineering & Testing. LLC 2789 Riverside Parkway Grand Junction, CO 81501 970-255-8005 TEST PIT NUMBER TP-2 PAGE 1 OF 1 PROJECT NUMBER PROJECT LOCATION PROJECT MME 314 CorvellCLIENT Clavton Homes GROUND WATER LEVELS: ATTME OF EXCAVATION AT END OF EXCAVATION AFTER EXCAVATION -- TEST PIT SIZE Drv DrvCHECKED BY MABLOGGED BY TEC EXCAVATION CONTMCTOR Client COMPLETED 1118/24 GROUND ELEVATION NOTES EXCAVATION METHOD Trackh/Backhoe DATE STARTEO ,1118124 IF(L uJo q +8E-(9 MATERIAL DESCRIPTION uJ(L>EF lJI 5='O-->= U) s E^ 9a 8s IJJt au>Fl Yf<do>oz 2 IJJ(L FGu9 Oo o_ 5 L zt) -O to ur )et:'l= 'ay) Oz>oo o- o= J- OtrF 3= o- E;TXYul 42 Fz tUFzOGO9 U)ulz LL Silt Loam with Organics (TOPSOIL) 5.0 moderate granular structure (Soil Silt Loam wilh Gravel, lan to moist, medium dense, 2 < 35% Rock) of test pit at 7.0 feet. F6 dt 5 cq a E I6 IoUFoU(, Huddleston-Berry Engineering & Testing, LLC 2789 Riverside Parkrvay Grand Junction, CO 81501 970-255-800s PROJECT NUMBER PROJECT LOCATION PROJECT NAME 314 Corvell RidoeCLIENT Clavton Homes TEST PIT NUMBER TP.3 PAGE 1 OF 1 TEST PIT SIZE CHECKEDBY MAB DrvEXCAVATION METHOD Trankh/Rankhne LOGGED BY TEC EXCAVATION CONTRACTOR Client AT END OF EXCAVATION Dry GROUND ELEVATION NOTES AFTER EXCAVATION -- GROUND WATER LEVELS: AT]IME OF EXCAVATION DATE STARTED 1118124 COMPLETED 1118/24 IF(L UJo o +8t'o MATERIAL DESCRIPTION IJJ o->tFur 5g o- ='=z(/) s qa gtr- -t afr>Ff ;asoz z IJJ(Lr-Gu9 oo(L I z.)lg to r.u;3t- !.2 tD Fro2>oo Qr a<)- otrF 3= F;-ix = tIJ 69l= 0- Fz uJFzOGo9lo IJJztr Silt Loam with Organics (TOPSOIL) Silt Loam with Gravel, tan to brown, moist, moderate granular structure (Soil Type 2 < 35% Rock) dense Bottom of test at 6.0 feet. Fz I a; o o oz Huddleston-Berry Engineering & Testing, LLC 2789 Riverside Parkway Grand Junction, CO 81501 970-255-8005 TEST PIT NUMBER TP4 PAGE 1 OF 1 PROJECT }.IAME 314 Corvell Ridoe PROJECTNUMBER 01 PROJECT LOCATION CLIENT Clavton Homes GROUND WATER LEVELS: AT TIME OF EXCAVATION AT END OF EXCAVATION AFTER EXCAVATION -- TEST PIT SIZE CHECKED BY MAB Drv EXCAVATION METHOD Trackh/Backhoe DATE STARTED 11t8t24 COMPLETED 1118/24 GROUND ELEVATION NOTES LOGGEDBY TEC EXCAVATION CONTRACTOR Client ATTERBERG LIMITS IF(L ruo o FoL^<Yd-(, MATERIAL DESCRIPTION UJ 0->tF I.U -rtgo- =l>z a s q8 gs UJt au>Fl E=46o>QZ zt!& u9 oo(L E F^ =Ex.o Lll o\t:' arlrJo2>oo Qr J- OtrF g= o_ F0t 42 FzulFzOGOCalrlz LL Silt Loam with Organics brown, moist, (Soil Type 2 < silr withLoam tan to densemedium moderate structure 35o/ogranular Rock) Bottom of test pit at 6.0 feet. al Fz rm IouFoU(, hl!d\ ite Loca ) T .-$100.00tu. 2. Reinspection fees .... '. (the fee doubles each time the fine is issued for the same infraction) ."$100.00/hr- 3.Inspections for which no fee is specificallY indicated (minimum charge-I hour) ,"q*ir"d by changes, additions or revisions to plans" "$100'00/hr' I hour) 4. Additional Plan review (minimum charge - .........$400.00 to 5000 cu. yd- Other fnspecfions and Fees: 1. Inspectiins outside of normal business hours' (minimum charge-two hours) 5. Grading Permits M;j;r Grading - over 20,000-sq' ft' or over 5000 cu' Yd' "' Minor Grading _r&' trr* or equal to zo,ooo sq. ft. or less than or equal 6. Manufactoted Ho*" Fee (single level) .$100.00 ..$400.00 7. Manufactured Home Fee (multi level) Covered decks, carPorts and Patios Unfinished basements : :::...: ... : :H:ffi units that are in additionto the ....$600.00 ....$100.00 8. Re-roofing Fee-Residential'' 8. Re-roofing Fee-Commercial' 9. Demo Permit. 10. s}Yoof the permit and plan review_fee is waived for deed restricted ,rqrrir"J *itt in the Lana Use and Development Code' Qther Valuations per squarc f:oot qnless stated otherwise: Garages, Pole barns, and wood storage blds' Conditioned Garages. 32"00 .."". w'00 32.00 ..24'00 F oundations/crawlsPace s 24.00 50.00 Basement conversion unfin to fin Plan check fee basement conversron " ' Decks. Underground Pools Mini storage building ... ...".....,18.00 -"20"00 .-40.00 F, ..$100,00/hr' 2. Reinspection fees . '. .. (the fee doubles each time the fine is issued for the same infraction) $r00.00/hr- 3.Inspections for which no fee is specificallY indicated (minimum charge-t hour) ,rqrrir"a by changes, additions or revisions to plans" "$100'00lhr'4. Additional plan review (minimum charge - I hour) 5. Grading Permits MajorGrading_ovet20,000.sq.ft.or'over5^0009u'Yd............$400.00 Minor Grading -lJss than or equal tJ io,boo sq. ft. or less than or equal to 5000 cu- yd' """"'$100'00 6. Manufactured Home Fee (single level) """"$400'm 7. Manufactured Home Fee (multi level)' '"'""$600'00 8. Re-roofing Fee-Residential' ""."""""'$100'00 8. Re-roofing Fee-Commereial' ' ".---,-----l:::l::.:::]{!3:ffi 9. Demo Permlt. """"""""": 10. 51yoof the permit and plan review_fee is waived for deed restricted units that are in additionto the requited units in the Land Use and Development Code' QtherValuptiqnspgrsquarefootunlgssstatedotberwise: Other fnspections and X'ees: L lnspectiions outside of normal business hours" (minimum charge-two hours) Garages, Pole barns, and wood storage blds' ' Conditioned Garages Covered decks, carPorts and Patios Uffinished basements Foundations/crawlsPaces "''' Basement conversion unfin to fin Plan check fee basement conversron Decks Underground Pools Mini storage buiiding M0,00 ..32.00 24.00 32.00 24.00 .. *-:-: i;':d:;H .........18.00 ..40.00 tr