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Home My WebLink AboutOWTS DesignON-SITE WASTEWATER TREATMENT SYSTEM REPORT TBD CR 3OO PARACHUTE GARFTELD COUNTY, CO PREPARçD FqR GARFI ELD COUNTY ENVI RONMENTAL HEALTH ONS¡TE WASTEWATER SYSTEMS X95 WEST 14TH STREET R|FLE, CO 81650 PREPARED BY FOR John E. Kornfeld, P.E. 565 Falrways Drlve Mesquite, NV 89027 November L7,2O2l. fìf 33064 tl .7rl This report and design were completed by John E. Kornfeld, P.E. on July 19, 2O2L. Mr. Kornfeld's contact information is: John E. Kornfeld, P.E. 565 Fairways Drive Mesquite, NV 89027 970.250.t18L iohnk@ rhinoeneineers.com Mr. Kornfeld has been designing individual and commercial wastewater systems for more than 30 years. The property address is TBD CR 300 and includes an undeveloped lot. There will be a future 3-bedroom modular house placed on the lot. According to the Garfield County Parcel property information, the tax parcel identification number is 24O7O7LO1007 (tax account R270052). The owner of the property is Steven and Barbara Hobson, 6806 W Arizona Ave, Denver, CO 80232. The legal description of the property is a parcel situate in Section 7 Township 7 South Range 95 West of the 6th Principal Meridian and the detailed description is located on the survey pdf in the appendix of this report. The property is about 1.2 acres. There is not an existing well located on the property. This property is characterized as moderately sloping on the east side of the parcel, breaking to a steeply sloping west aspect on the west side of the property towards the Colorado River. The property is not within a floodplain. According to NRCS WebSoilSurvey, the soil mapping unit consists of 58 - Potts-lldefonso complex, 12 to 2Spercent slopes. These soils are deep, i.e., more than 60 inches below the surface. These soils formed in alluvium derived from basalt and/or alluvium derived from sandstone and shale. These soils are rated limited by the NRCS for slow water movement. The soil description is located in the appendix. Two backhoe pits were excavated near the location where the proposed absorption area is proposed The typical soil profile includes: O"- 4" Loam, granular structure, abundant roots 4"-28" Clay Loam, moderate subangular blocky structure, moderate roots 28"- 60" Loam, moderate subangular blocky structure, few roots Depth to the water table is beyond 60" and the soil profile was dry throughout. The soil profile is representative of the Potts loam. Perc rates at the 2-feet depth averaged 48 minutes per inch; at the 4-feet depth, perc rates averaged 11 minutes inch and the at the 6-feet depth, perc rates averaged 7 minutes per inch for Backhoe Pit 1. Perc rates for the 2-feet depth for Backhoe Pit 2 average 15 minutes per inch. At the deeper depths, water percolated quickly and there was insufficient water onsite to maintain the deeper perc rates. Desien Based on Colorado Department of Public Health resulations: Physical features on the property that will require setbacks for this system include property lines, future water line, and the future residence. Setback regulations are listed below and are based on the new regulations. Calculations for the absorption area: The future residence has 3 bedrooms. Based on 3 bedrooms, the average daily wastewater flow will be 150 gallons per bedroom per day x 3 bedrooms for a total of 450 gpd. Based on 48" + of adequate soil, reasonably strong soil structure, and satisfactory perc rates, this soil is Type 3. With a Soil Type 3, use a LTAR of 0.50 gpd/sf. Based on a LTAR of 0.60, the required surface area is 750 square feet (450 gpd/0.60 gpd/sf). Using a gravity bed with perforated pipe and gravel, there is a 1.2 factor for a size adjustment for the soil treatment area. Therefore, the total absorption area is 900 square feet. Using a maximum bed width of 12 feet, the required length is 75 linear feet (900 square feet/l2 feet). SU PPLEM ENTAL SPECI FICATIONS AN D CONSTRUCTION REQU I REM ENTS The contractor must be approved and licensed by Garfield County Environmental Health for installation of on-site wastewater treatment systems. The contractor shall comply with Garfield County and the State of Colorado On-Site Wastewater Treatment System Regulations, effective date of July 7,2019, with the following supplemental provisions and/or construction requirements: 1. The building sewer to septic tank pipe shall be four (4) inches in diameter 2. The minimum size of septic tank shall be 1000 gallons, although a 1250-gallon tank is recommended 3. The minimum distance between the septic tank and the absorption area shall be 20 feet. 4. The following minimum setbacks shall be observed Source Absorption Field Water line Domestic well Dwelling Property lines Subsurface drain lrrigation ditch -open -lined -gated 10' 100' LO' 10' 25' 50' 25', LO' -solid pipe 10' 5. To avoid surface flow infiltration and saturation of the new absorption system, abandonment of any irrigation in the vicinity of the disposal system is required (if necessary). Diversion ditches necessary to divert surface flows around the new absorption area must maintain the minimum setbacks listed above. 6. The surface 24" of surface soils are to be removed for a 12' wide by 75 feet long absorption area Stockpile the surface soils to be used as the cover over the gravity system. 7. Final cover shall not be placed on sewer lines, septic tank, or the absorption area until the system has been inspected by the design engineer and the Garfield County Environmental Health. The installer shall provide 48-hour notice to the engineer and the Garfield County Environmental Health for all required inspections. 8. Fabric shall be installed over the gravel system after final inspection by the Garfield County Environmental Health representative and the engineer. 9. All access manholes on septic tanks will be child proof and contain appropriate warning labels if accessible to the public. Confined space entry precautions should be observed by maintenance personnel. 10. The surface cap over the gravel system shall consist of native soil material mounded 3-5% over the absorption field to promote surface runoff. 11. All setbacks are measured from the toe slope of the topsoil cap - not from the edge of the absorption area chambers. Sterc & Barbara Hobeon&3bDr!:PhPlrtrlúl¡ÊcTBD County Road 3ül (N. BaüenentWby) Pa¡achr¡Þ, CO 81æ5CRil{r$}"Proposed location for leach field if poisibþ_l10'2s----+lenocyu:JLf-o4tJProFrVLheCRTNE rt¡fnGmÈrñú6rh!:P!o!.rt¡b GnSG/¡obh ùopDlrüæbcto¡lDarülbÉ otùartmosBddñ/rù.d¡ú Srlù..bIttt¡GtúËrrÞ.tltr g@Ê!4lnrk'tltr.tã¡WtL$üt6Wü¡lEy'C!ûaWb!CtltñrtGü/Þ!DEEGúSchS.!.¡/hón åütúelcdtddio¡EqcVlbæAolvAætfüE lbrdoÉ¡¡rtlt IffiSgDtürESlgnaùreSales P¡toftsstoal _ 9¡ IãflrËçiñô T Ãã;.cioqts - ôc9e o >-^'Ð 1ÉÉ ¿ ıÅa ó=ıT Èid"ÅIaì6iËiã*'ìPcàË!!lla ÍulåÍ¡isåLOCATION MAPTBD CR 3OO(N. BATTLEMENT WAY)PARACHUTE, COLORADOEE UÏLITY NOTIFICATION CENTEROF COLORADOcA[ ñtWRÆGENVAE FG H Uffi 6UM12'X 75' SEEPAGE BEDts=oÉÀIzFÀoEo26-1250 GAL SÊPTIC TANK25'PROPERIY LINE (APPROXIMA'TE)ÏBD COUNTY ROAD 5OO (N BAT'ILEMENT WAY)dffi$M24' x 27'FUÏURE GARAGE30'x 6ô'FUTURE HOUSE12' t 20'ÞÄTÔisrt+Ê¡i-j^o>o=É.Fo oóó za> L¡lU<tr> -J()Ul.rJLl,l^ F:r;Fkã.tz<-L29€ t_IIit,ll-r -1llirillLÀ_ _________L____ lJ"gedøüıìo¡rãt4ÈËIÈ-IìEtsoàqèib6gtF\-ìIIIL______',!þIIIIsT-tlxlll2lôlet;l¡l9IElfitlqt>tnlülsl{t>lrIt{sl;6lãñ91IEc-{r-loz¡O8i5çn4>Ãgzc)mz--{TNnItsIcB*4tifiåiiSOIL PROFILE COMPARISONTBD CR 3OO(N. BATTLEMENT WAY)PARACHUÏE, COLORADOËiãtiìrrËËrc(Iü UTILITY NOTIFICATON CENTEROF COLORADOruat1æAVAE Fd DETffi Flm UruIESSEEPACE BEÐ ÐETAII,SDISTRIEU]ION BOX AND MAMFOLD SYSIEM(soLrD P|PE)75.0'TO SEP'NC TANK12.O'TABLE OF ESTIMA'ÍED ELEVATIONS FOR DESIGN/CONSTRUCTIONFINISHEDELEVATION EXISTNGELEVATONEX 4'' INVERT FROM HOUSE 5317.0* 5319INV IN SEPTIC TANK 5316.0 5518INV OUT SEP'IIC TANK 5315.8 5318INV IN DISTRIBUTONBOX 5310.0 5312INV IN SEEPAGE BED 5309.8 5312TOP OF COVER OVER BED 5312.0 5312-)1.5'PÊRFORA1ED PPE(coNNEcTED AT ENDSUTH SOUD PIPING)NOIE: PERFORAIED PIPEBEGINS 1.5' INSIDE GRA\ELBEDSEEPAGE BEDEXISÎNG ELEVATONS ARE PER GOOGLE EAR1H ANDFINISHED ELEVATONS ARE ESTIMA'TED. INSTALLER TO VERIFY ELEVATIONS & REQUIREDGRADES TO MEEÎ GARRELD COUNTY CODE REOUIREMENIS.(EX]ENT OF GRA\€LS)NTS* THE BOTTOM OF THE SIRUCTURE WLL LIKELY BE 2+ FEET ABOVE EXISTNG GROUND.NOÌES:1. REMOVE VEGETATON OVER ABSORPTION AREA.2. EXCAVA]E AND REMOVE SURFACE SOILS TO APPROXIMA]ELY 24' DEPTH.3. VERIFY IHAT AT LEAST 48 INCHES OF SUITABLE SOILS EXS'T ABOVE ANY SEASONAL HIGHWAÌER TABLE. NO SEASONAL WATER TABLE IS ANTCIPA'IED.4. AFTER NAÍI\E SOILS ARE TO GRADL SCARIFY lHE NEXT 6 INCHES.5. PLACE GRAVEL AND INSTALL DIS1RIEUTION MANIFOLD AND PERFORA'IED PIPES PER ABOVEDIMENSIONS.6,'IHE DIS'IRIBUNON MANIFOLD S1IALL BE INSTALLED "LE\EL" TO A MAXIMUM OF 1/8" PER FOOT.7. lHE TOPSOIL "CAP' SHALL BE SLOPED (I8" 'IHICK¡.IESS AT CENTER TAPERING TO 12" ATOUTSIDE). ]HE FINISHED SURFACE OF 'IHE SEEPAGE BËD SHALL MATCH ]HE EXISTING GROUND.8. S TBACKS ARE MEASURED FROM THE TOE OF SLOPE (TOPSOIL CAP).9. ALL CONSIRUCïON, DIMENS|o1,IS, AND MAÍERIALS SHALL COMPLY tlllH MESA COUNTYON-SITE WAS'IEWATER IREAÌI.IENT SYS'IEM REGULATONS UNLESS O'IHERWSE SPECIFIED.10. ACÏUAL CONFIGURATON OF SEPIIC TANK TO SEEPAGE BED ORIENTAIION MAY VARYDEPENDING UPON SIIE CONOIÎONS AND DIMENSIONS.l____1(nJ<^oF >ôrJ <<o =91.,o. qñzoÔ U(JH5 ñ ,rJ=z^-\eE !_Í(L -<ızãln -[m4ffi PERCOLATION TEST RESULTS for TBD County Road 300 Perc Test Dale: 07 I 1 212021 Locat¡on: North of Future House PIT# f Test Pit Reference Depth Time (minutes) Depth to Water Surtace Ghange in Time Ghange in Depth 0.38 0.25 0.25 15 16.13 15 30 16.50 60 17.00 15 Average Percolation Rate: 60 minutes per 1.25 inches = 48 minutes per I lnch PIT#1 Tést Pit Reference Depth (lnches) Tlme (minutes) Depth to Water Surlace (inches) Change in Time (minutes) Ghange ln Depth (inches) 48"0 5.50 15 6.50 15 1.00 30 8.25 15 1.75 45 9.25 't5 1.00 Average Percolatlon Rate: 60 mlnutes per 5.5 inches = 10.9 minutes per I lnch PIT#1 Test Pit Time Depth to Change Change Reference Depth (mlnutes) Water Surface ln Time ln Depth 15 9.50 15 1.75 13.00 15 3.50 3.50 15 Average Percolation Rate: 60 m¡nutes per 9.25 inches = 6.5 minutes per I ¡nch 0 0.00 30 60 Soil Profile 0-4" 4-28" 28-60' Loam, granular, moderate roots Glay Loam, moderate subangular blocky slructure, few rools Loam, moderate subangular blocky structure, no roots Soils dry throughout profiled NRCS classifies these soils as Potts-lldefonso complex, 12lo 25 percent slopes. Soils are representative. PERCOLATION TEST RESULTS for TBD County Road 300 Perc Test Dale: 07 I 1 212021 Location: North of Future House PIT #2 Test Plt Reference Depth (lnches) T¡me (m¡nutes) Depth to Water Surface (inches) Ghange ln Tlme (mlnutes) Change in Depth (inches) 24',0 17.50 0 0.00 15 19.00 15 1.50 30 19.75 15 0.75 45 21.00 15 1.25 60 15 0.50 Average Percolation Rate: 60 minutes per 4.0 inches = 15.0 minutes per f inch PIT #2 Test Plt Time Depth to Ghange Ghange Reference Depth (minutes) Water Surface ln Tlme in Depth 15 40.00 t5 2.25 30 15 45 15 60 15 Average Percolation Rate: Percs too fast wlth the amount of water onslte. PIT #2 Test Pit Reference Depth (inches) Time (mlnutes) Depth to Water Surface (inches) Change in Time (m¡nutes) Ghange ln Depth (lnches) 0 0 15 15 30 15 45 15 Average Percolation Rate Soll Profile 0-4' 4-28" 28-60" Loam, granular, moderate rools Clay Loam, moderate subangular blocky structure, tew rools Loam, moderate subangular blocky struclure, no roots Soils dry throughout profile. NRCS classifies these soils as Potls-lldefonso complex, 12-25% slopes. Soils are representative. 3ı¡Soil Map-Rifle Area, Colorado, Parts of Garfield and Mesa Counties(cR 3oo)ø7tÐ75r'a107Cß10Web Soil SurveyNational Cooperative Soil Survey=t'ñrËã4510Natural ResourcesConservation Sewice7545607#107545ã)ñ4610754660wn1075/nÊÃMap Scaþ: 1:2,440 if ptrd onAhndscape (11' x8,S) $e€r_ ,ÞleEs03570 1Æz|o- 'ftE[01mÃn¡m6mlvlap proixti¡r: \ /eb Plercabr Cdner @odinaÞs: \ /GS84 EdgE tics: t rIM bte 12I\t WGSB¿ı4q)7gÌ10g 277çtNaÈ:l!P 271yN3ÞIËgsFsaEosÞgEosRÞRsIe75/5107glt0=ä¡aBb'¡!åNAUSDA:711612021Page I of339p 2:-/rN754Þ754910754(m390 27SN USDA7-Natural ResourcesGonsewation SeruiceSoil Map-Rifle Area, Colorado, Parts of Garfield and Mesa Counties(cR 300)Web Soil SurveyNational Cooperative Soil Survey711612021Page 2 of 3MAP LEGENDMAP INFORMATIONThe soil surveys that comprise yourAOl were mapped at'l:24,000.Warning: Soil Map may not be valid at this scale.Enlargement of maps beyond the scale of mapping can causem¡sunderstanding of the detail of mapping and accuracy of soilline placement. The maps do not show the small areas ofcontrasting soils that could have been shown at a more detailedscale.Please rely on the bar scale on each map sheet for mapmeasurements.Source of Map: Natural Resources Conservation ServiceWeb Soil Survey URL:Coordinate System: Web Mercator (EPSG:3857)Maps from the Web Soil Survey are based on the Web Mercatorprojection, which preserves direction and shape but distortsdistance and area. A projection that preserves area, such as theAlbers equal-area conic projection, should be used if moreaccurate calculations of distance or area are required.This product is generated from the USDA-NRCS certified data asof the version date(s) listed below.Soil Survey Area: Rifle Area, Colorado, Parts of Garfield andMesa CountiesSurvey Area Data: Version 13, Jun 5,2020Soil map units are labeled (as space allows) for map scales1:50,000 or larger.Date(s) aerial images were photographed: Dec 31, 2009-Oct12,2017The orthophoto or other base map on which the soil lines werecompiled and digitized probably differs from the backgroundimagery displayed on these maps. As a result, some minorshifring of map un¡t boundaries may be evident.Arca of lnterest (AOl)SoílsArea of lnterest (AOl)Soil Map Unit Polygonsã Spoil Aread Stonyspotffi VeryStonySpotff WetSpot* Otherã- Special Line FeaturesWater FeaturesSlreams and CanalsTransportât¡on¡4l Railsrãlr lnterstate Highways6ñdrâ US Routes:::i:. :ì Majof Roads: Local RoadsBackgroundI Aerial PhotographyÊqdr So¡l Map Un¡t Lines¡ Soil Map Unit PointsSpecial Poinl Features(9l BlowoutHl Bonow PitH Clay Spot# Closed DepressionH Gravel Pit""¡ Gravelly SpotË LandfillÀ Lava Flowéb Marsh orswampæ Mine or Quarrym Miscellaneous Water@ Perennial Watergl Rock Outcrop+ Saline Spot;-; SandySpot"ã Severely Eroded Spot& Sinkholeþ Slide or Slipø Sodic Spot Soil Map-Rifle Area, Colorado, Parts of Garfield and Mesa Counties cR 300 Map Unit Legend irlap Unit Symbol Map Unit Name Acres ln AOI Percent ofAOl 34 lldefonso stony loam, 25to 45 percent slopes 0.3 1.2o/o 58 Potts-lldefonso complex, 12 to 25 percent slopes 11.3 46.0o/o 65 Torrifluvents, nearly level Water 6.5 6.5 26.2o/o 26.60/o73 Totals for Area of Interest 24.6 100.0% USDA - Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 711612021 Page 3 of 3 Map Unit Description: Potts-lldefonso complex, '12 to 25 percent slopes--Rifle Area, Colorado, Parts of Garfield and Mesa Counties cR 300 Rifle Area, Golorado, Parts of Garfield and Mesa Counties S8-Potts-lldefonso complex, 12 to 25 percent slopes Map Unit Setting National map unit symbol: jnyv Elevation: 5,000 to 6,500 feet Farmland classification: Not prime farmland Map Unit Gomposition Potts and similar soils; 60 percent Ildefonso and similar so/s; 30 percent Esfmafes are based on obseruations, descriptions, and transects of the mapunit. Description of Potts Setting Landform: Valley sides, alluvial fans, mesas Down-slope shape: Convex, linear Across-s/ope shape: Convex, linear Parent material: Alluvium derived from basalt and/or alluvium derived from sandstone and shale Typicalprofile Hl -0to4inches: loam H2 - 4 to 28 inches; clay loam H3 - 28 to 60 inches; loam Properties and qualities S/ope;12to25 percent Depth to restrictive feature: More than 80 inches Drainage c/ass; Well drained Runoff class; High Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr) Depth to water table.' More than 80 inches Frequency of f/ooding; None F req u e n cy of pondlng; None Calcium carbonate, maximum content: I5 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water capacity: High (about 10.3 inches) lnterpretive groups La n d c a p a b i I ity cl a s s if i cati o n ( i rri g ated,) ; N on e specif ied Land capability classification (nonirrigated): 6e Hydrologic Soil Group: C EcologicalsÍe; R048AY298CO - Rolling Loam Hydric so/ rafing; No USDAv=Natural Resources Conservafion Service Web Soil Survey National Cooperative Soil Survey 711612021 Page 1 ol 2 Map Unit Description: Potts-lldefonso complex, 12to 25 percent slopes--Rifle Area, Colorado, Parts of Garfield and Mesa Counties cR 300 Description of lldefonso Setting Landform: Mesas, valley sides, alluvial fans Down-slope shape: Convex Across-s/op e shape: Convex Parent material: Alluvium derived from basalt and/or alluvium derived from sandstone and shale Typicalprofile H1 - 0 to I inches: stony loam H2 - I to 60 inches.' very stony loam Properties and qualities S/ope; 12 to 25 percent Depth to restrictive feature: More than 80 inches Drainage c/ass; Well drained Runoff class.' Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 35 percent Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water capacity: Low (about 5.1 inches) lnterpretive groups Land capability classification (irrigated): None specified Land capability classification (noninigated): 6e Hydrologic Soil Group: A Hydricsollrafing; No Data Source lnformation Soil Survey Area: Rifle Area, Colorado, Parts of Garfield and Mesa Counties SurveyArea Data: Version 13, Jun 5,2020 USDA - Natural Resources Gonservation Service Web Soil Survey National Cooperative Soil Survey 7t16t2021 Page2oÍ2 =tl¡\¡IÈtu-ñIseptic Tank Absorption Fields-Rifle Area, colorado, Parts of Garfield and Mesa counties(cR 300)ßm07Af76D7548d)754660TVmOEflH)Éß107545073161OE4ã)É6toMap S(aþ: 1:2,440 if priìbd on Ahn&cape (11' x8.5) $eÉ.osro1&zoËdolmzn¿m6mlvlap poldin: ltþb ft4ercabr Crner@rdiËÞs: WGS84 Edgetks: tfiM Ane UN WGS8473(t0slo 2719NaÞSÞ39 271yNRFRËIEIIRËRÞEÞ754510EÐIO=Nã¡=t,toåNANatural ResourcesConse¡vation ServiceWeb Soil SurveyNational Cooperative Soil Survey711612021Page 1 of53P 278NtSDA-Étso7Bt9lO754S03F 278N TJSDA-Natural ResourcesConservation ServiceSeptic Tank Absorption Fields-Rifle Area, Colorado, Parts of Garfield and Mesa Counties(cR 300)Web Soil SurveyNational Cooperative Soil Survey711612021Page 2 of 5MAP LEGENDMAP INFORMATIONArea of lnterest (AOl)n Area of lnterest (AOl)SoilsSoil Ratíng PolygonsW VerylimitedE Somewhat lim¡tedBackgroundI Aerial PhotographyThe soil surveys that comprise your AOI were mapped at1:24,000.Not limitedWaming: Soil Map may not be valid at this scale.Enlargement of maps beyond the scale of mapping can causemisunderstanding of the detail of mapping and accuracy of soilline placement. The maps do not show the small areas ofcontrasting soils that could have been shown at a more detailedscale.E Not rated or not availableSoil Rating LinesrìË Very limitedt t Somewhat limitedcq# Not limited. t Not rated or not availableSo¡l Rat¡ng PointsI Very limitedtr Somewhat limited¡ Not limitedtr Not rated or not availableWater Featu¡esJ-i-' Streams and GanalsTransportat¡ont+ RailstH lnterstate HighwaysFq]r$ US Routes--*:.. Major Roads-:r -i Local RoadsPlease rely on the bar scale on each map sheet for mapmeasurements.Source of Map: Natural Resources Conservation ServiceWeb Soil Survey URL:Coordinate System: Web Mercator (EPSG:3857)Maps from the Web Soil Survey are based on the Web Mercatorprojection, which preserves direction and shape but distortsdistance and area. A projection that preserves area, such as theAlbers equal-area conic projection, should be used if moreaccurate calculations of distance or area are required.This product is generated from the USDA-NRCS certified data asof the version date(s) listed below.Soil Survey Area: Rifle Area, Colorado, Parts of Garfield andMesa CountiesSurveyArea Data: Version 13, Jun 5,2020Soil map units are labeled (as space allows) for map scalesl:50,000 or larger.Date(s) aerial images were photographed: Dec 31,2009-Oct12,2017The orthophoto or other base map on which the soil lines werecompiled and digitized probably difiers from the backgroundimagery displayed on these maps. As a result, some minorshifting of map unit boundaries may be evident. Septic Tank Absorption Fields-Rifle Area, Colorado, Parts of Garfield and Mesa Counties cR 300 Septic Tank Absorption Fields Map unit symbol Map unit name Rating Component name (percent) Rating reasons (numerlc values) Acres in AOI Percent of AOI 34 lldefonso stony loam, 25 to 45 percent slopes Very limited lldefonso (90%)Slope (1.00)0.3 1.2% Large stones (1.00) 58 Potts-lldefonso complex, 12 to 25 percent slopes Very limited Potts (60%)Slow water movement (1.00) Slope (1.00) 11.3 46.0% lldefonso (30%)Slope (1.00) Large stones (1.00) 65 73 Torrifluvents, nearly level Water Very limited Not rated Torrifluvents (85%) Water (100%) Flooding (1.00)6.5 6.5 26.2o/o 26.60/o Depth to saturated zone (1.00) Slow water movement (0.47',) Totals for Area of Interest 24.6 100.0% Ratlng Acres ln AOI Percent of AOI Very limited 18.1 73.4% Null or Not Rated 6.5 26.6% Totals for Area of lnterest 24.6 100.0% USDA - Natural Resources Gonservation Service Web Soil Survey National Cooperative Soil Survey 7t16t2021 Page 3 of 5 Septic Tank Absorption Fields-Rifle Area, Colorado, Parts of Garfield and Mesa Counties cR 300 Description Septic tank absorption fields are areas in which effluent from a septic tank is distributed into the soil through subsurface tiles or perforated pipe. Only that part of the soil between depths oÍ 24 and 60 inches is evaluated. ïhe ratings are based on the soil properties that affect absorption of the effluent, construction and maintenance of the system, and public health. Saturated hydraulic conductivity (Ksat), depth to a water table, ponding, depth to bedrock or a cemented pan, and flooding affect absorption of the effluent. Stones and boulders, ice, and bedrock or a cemented pan interfere with installation. Subsidence interferes with installation and maintenance. Excessive slope may cause lateral seepage and surfacing of the effluent in downslope areas. Some soils are underlain by loose sand and gravel or fractured bedrock at a depth of less than 4 feet below the distributíon lines. ln these soils the absorption field may not adequately filter the effluent, particularly when the system is new As a result, the ground water may become contaminated. The ratings are both verbal and numerical. Rating class terms indicate the extent to which the soils are limited by all of the soil features that affect the specified use. "Not limited" indicates that the soil has features that are very favorable for the specified use. Good performance and very low maintenance can be expected. "Somewhat limited" indicates that the soil has features that are moderately favorable for the specified use. The limitations can be overcome or minimized by special planning, design, or installation. Fair performance and moderate maintenance can be expected. "Very limited" indicates that the soil has one or more features that are unfavorable for the specified use. The limitations generally cannot be overcome without major soil reclamation, special design, or expensive installation procedures. Poor performance and high maintenance can be expected. Numerical ratings indicate the severity of individual limitations. The ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate gradations between the point at which a soil feature has the greatest negative impact on the use (1.00) and the point at which the soil feature is not a limitation (0.00). The map unit components listed for each map unit in the accompanying Summary by Map Unit table in Web Soil Survey or the Aggregation Report in Soil Data Viewer are determined by the aggregation method chosen. An aggregated rating class is shown for each map unit. The components listed for each map unit are only those that have the same rating class as listed for the map unit. The percent composition of each component in a particular map unit is presented to help the user better understand the percentage of each map unit that has the rating presented. Other components with different ratings may be present in each map unit. The ratings for all components, regardless of the map unit aggregated rating, can be viewed by generating the equivalent report from the Soil Reports tab in Web Soil Survey or from the Soil Data Mart site. Onsite investigation may be needed to validate these interpretations and to confirm the identity of the soil on a given site. USDA - Natural Resources Gonservation Service Web Soil Survey National Cooperative Soil Survey 7t16t2021 Page 4 of 5 Septic Tank Absorption Fields-Rifle Area, Colorado, Parts of Garfield and Mesa Counties cR 300 Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule; Higher USDA:Natural Resources Gonseryation Seryice Web Soil Survey National Cooperative Soil Survey 7t16t2021 Page 5 of 5 711612021 Garfield County Colorado Open GIS Dats : Garfield County Parcels : Garfield County Parcels j 27,927 records ,ì l. . ::r, 'l : + q Bureau of Land Management, Esri, HERE, Garmin, INCREMENT P, USGS, EPA, USDA Powered by Esri 711612021 Garfield County Golorado Open GIS Data : Garfield County Parcels : Garfield County Parcels Garfield Countv Colorado Open GIS Data Garfield County Pa rcels 27,927 records Private Member Q Garfield County, Co J l,i-" rnern ber':; pro{i le infor rrr¿¡tion is ¡rrivi:te. Summary Garfield County, CO parcels Viern¡ [:ull Details Dataset Feature Layer June 22,2021 lnfo Updated June 22,2021 Data Updated November 15,2O19 Published Date 27,927 Records View data table Public Anyone can see this content Custom License View license details I want to use this : Bureau of Land Management, Esri, HERE, Garmin, ... Powered by Esri c o Ë E @ Ê F óó88 240707101007 {409ED0Aó-óF21 -4441 - AADS-OEA2,I l ODEFDF} R270052 Þ^Ntr:tr Qq Q zoom to 0 1.27999997 Garfield County Parcels OBJECTID PARCELNB ID ACCOUNTNB OWNER CAREOFNAME OWNERADDRESS OWNERCITY OWNERSTATE OWNERZIP OWNERCOUNTRY ACRES SOFT HOBSON, STEVEN K & BARBARA L ó80ó W ARIZONA AVENUE DENVER, CO 80232 DENVER co 80232 711612021 Garfield County Colorado Open GIS Data : Garfield County Parcels : Garfield County Parcels Garfield Countv Colorado üpen GIS Data Garfield County Parcels ' This; nrernber's profile infornration is private.Private Member Garfield County, Co 5ummary Garfield County, CO parcels View Full Details Dataset Feature Layer June 22,2021 lnfo Updated June 22,2021 Data Updated November 15,20'19 Published Date 27,927 Records View data table Public Anyone can see this content Custom License View license details I vv¿:nt to use tlris 5lÈÊføts2u=.uôEÈ=ÞÊú!5IzIEo:g5EñMN2!øEøIMPROWIW:BNT SUR yE y ?LATA Parcel or lwrd sÍtuate - ;ffi;:ff#"' "ìi -!#:t' es west of ttte 6th P' M'!$&Frtæ::ËÞærsffiMÀEÐ¡ÆdEre-ø.lstElÐ¡Ea-æRrlErldrr.l4mæeGØEü¡ddepHf EmæEt¡¡sdiccaËå'Ù.çr'JbÚedËË¡&,qrrynarmaiam@-ma.æã,¡ @ Ð *Ðtt 4J û E@tÉø&ß@ñ6tÙsffi@#ffiË:ffim;rffi#ffi,ffi#ffi##'æâ@