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Home My WebLink About20173269.tiffOWTS Performance Report Silver Mountain Estates PUD Lots 1 thru 4 WCR 2b/WCR 17 Firestone, CO. 80520 March 2017 "I hereby certify that this report for the OWTS Performance Report of Silver Mountain Estates PUD was prepared by me (or under my direct supervision) in accordance with the provisions of the Weld County Department of Health and Environment (Sketch Plan PUD Application) for the owners thereof" Mark A. Taylor Registered Professional Engineer State of Colorado No. 46065 1 Table of Contents I. General Location and Description... , , , .. , , ..3 A. Location 3 B. Description of Property 3 f1. Drainage Basins and Sub -basins .... + ♦ 4 A. Major Basin Description ... 4 B. Sub -Basin Description III. Profile holes, detailed description........ A. Profile hole i1 ♦ 4 Profile hole #r ♦rir,.. S Future OWTS Desi, _ ns..r!•, ••r►. i i •ii B. Development Criteria and constraints (Setbacks)............,., I. Conclusions.... r.. ♦ .+ V. References 6 Appendix A �a e Al -2 A3- 5 A6 -lo Ali -13 Data Soils Visual Logs USDA Soils Report- Corrosion of Concrete USDA Soils Report -Septic Tank Absorption Fields USDA Soils Report- Depth to Water Table 2 General Location A. Location 1. The Preliminary Plan Drainage Report is for a parcel located in part of the East V2 Northeast 1 Section 5, Township 2 North, Range 67 West of the 6th P.M. The site location is Southwest of the intersection of WCR 26 and 17. A short Cul-de-sac road, 145 feet in length, is the proposed access for the 4 proposed lots. 3. The Lupton Meadows Ditch is located on the southern side of the site. 4. The area surrounding the site is largely undeveloped. The Town of Firestone has annexed the properties to the north and east and all of the roadways in the surrounding area. The area to the south of the site is agricultural land in Weld County and the property to the west is a residential property which is also located in Weld County. P. Description of Property 1. The area covered in this drainage report is Lots 1 thru 4 of the proposed Silver Mountain Estates PUD. The area of development is ± 11.39 Acres including the adjacent road right of ways. 2. The existing ground cover, on the site is dense native prairie grass that has not been farmed for several years. The site has two soil types, Vona loamy sands (99.4%) and Loup -noel loamy sands (0.6%). The Vona loamy sands type A (Hydrologic soil type) while the Loup-Boel loamy sands is type AID (Hydrologic soil type). 3. There are not existing structures on the site. 4. There are no water wells located in the proposed minor subdivision. Potable water will be provided by Central Weld Water District (CWWD). 5. The Lupton Meadows ditch is located on the southern side of the proposed development and is operated by: The Lupton Bottom Ditch Company Inc. 11016 County Road 23 Fort Lupton, CO 80621 Gene Wagner President 970 785-2147 6. The proposed site development of the site would consist of 4 single family building lots. The single-family lots range in size from ±2.08 ac to ±3,23 AC. The proposed road will consist of a short road and cul-de- sac, the total proposed center line of road length, including the cul-de-sac is 145 feet. 7. The Lupton Meadows ditch is located on the southern side of the proposed development and is operated by: The Lupton Bottom Ditch Company Inc. 11016 County Road 23 Fort Lupton, CO 80621 Gene Wagner President 3 970 785-2147 No other irrigation facilities exist within 200 feet of the site. 8. The ground water table is assumed to be deep over the majority of the subdivision site. From the Web Soils Survey, the depth to ground water is 6.5 feet or deeper. During the excavation of the two soil profile holes, ground water was encountered at 72 inches in the Southern profile hole, profile hole 1 of 2, and evidence of seasonally high ground water was observed at 70" in the form of Redox Features. In profile hole 42 of 2, no ground water was observed during the field observations, however there was evidence of seasonally high ground water at 63" in the form of Redox. H. Drainage Basins and Sub -Basins A. Major Basin Description 1. The site is located in the South Platte Drainage basin. On a local scale, the site is located in the St. Vrain drainage basin, the St. Vrain River is located about 1A miles to the Northwest. Both of these drainage basins have been transforming from a rural to an urbanized area for several years. 2. Floodplain: the site is not affected by a floodplain per Finn. Panel 08123C1895E, 1895E, dated January 20, 2016, please see the attached FIRM. B. Sub -Basin Description 1. The historic drainage pattern of the site is as follows. In general, Stormwater flows at this site flow from the South to the north at 2.0 to 2.5% grades. All offsite stormwater flows from the south are intercepted by the Lupton Meadows Ditch. No off -site stormwater flows enter the site from the east or north. A small area to the west of the site, 14,280 sf or 0.33 AC, does contribute as small amount of stormwater onto the site, this is a residential parcel. The surrounding areas are farmed, meadow/range land or in a fallow state. 2. All offsite stormwater flows from the south are intercepted by the Lupton Meadows Ditch, no off -site stormwater flows enter the site from the south east or north. A small area to the west of the site, 14,280 sf or 0.33 AC, does contribute as small amount of stormwater onto the site, this is a residential parcel. HI. Profile hole, detailed descriptions A. Profile Hole #1 Three soil types/layers where observed during the field soils investigation and as follows: Soil Texture Loam/Silt/Silt Loam, 0" to 16", Soil Type 2A with less than 5% rock and a Matric color of 10 YR 4/4 as determined using the Munsell Soil Color Book. The Structural shape is granular, Structural Grade is weak and a consistence that is Friable. Soil Texture Sandy Loam, 16" to 49", Soil Type 1 with less than 5% rock and a Matric color of 10 YR 4/4 as determined using the Munsell 4 Soil Color Book. The Structural shape is single Grain, Structural Grade is weak and a consistence that is Friable. Soil Texture Silty Clay Loam, 49" to 72", Soil Type 3 with less than 5% rock and a Matric color of 7.5 YR 4/6 as determined using the Munsell Soil Color Book. The Structural shape is prismatic, Structural Grade is strong and a consistence that is Firm. Gleyed Redox features were observed at 70" and are considered as the seasonally high ground water elevation. Profile Hole #2 Five soil types/layers where observed during the field soils investigation and as follows: Soil Texture Sandy Loam, 0" to 19", Soil Type 2A with less than 5% rock and a Matric color of 10 YR 4/4 as determined using the Munsell Soil Color Book. The Structural shape is massive, Structural Grade is weak and a consistence that is Friable. Soil Texture Sandy Clay Loam, 19" to 32", Soil Type 3 with less than 5% rock and a Matric color of 10 YR 5/6 as determined using the Munsell Soil Color Book. The Structural shape is single grain, Structural Grade is weak and a consistence that is Friable. Soil Texture Silt Loam, 32" to 43", Soil Type 2A with less than 5% rock and a Matric color of 10 YR 5/6 as determined using the Munsell Soil Color Book. The Structural shape is massive, Structural Grade is weak and a consistence that is Friable. Soil Texture Loam/Silt/Silt Loam, 43" to 63", Soil Type 2 with less than 5% rock and a Matric color of 10 YR 5/8 as determined using the Munsell Soil Color Book. The Structural shape is single grain, Structural Grade is weak and a consistence that is loose. Soil Texture Loam/Silt/Silt Loam, 63" to 90", Soil Type 3A with less than 5% rock and a Matric color of 10 YR 7/3 as determined using the Munsell Soil Color Book. The Structural shape is massive, Structural Grade is moderate and a consistence that is Firm. Gleyed Redox features were observed at 63" and are considered as the seasonally high ground water elevation. Future OWTS Designs The normal procedure for obtaining OWTS permits, for any of the lots within the Silver Mountain PUD, shall be followed. This OWTS Performance Report is not to be used in preparing and obtaining OWTS permits, this report may only be used as a reference. B. Development Criteria and Constraints (Set -backs) 1. There are existing gas and oil pipe lines, in an easement recorded REC NO. 4091454, dated 19, March 2015. Any OWTS components will be required to meet setbacks from this easement as if it were "the property line". 2. Additional setbacks, as defined by Table 30-7-1, include potable water lines, dwellings and occupied buildings, property lines, Stormwater facilities and unlined irrigation ditches. Potable water is being provided by CWWD. Table 30-7-1 shall be consulted during the design of any OWTS within the proposed PUD Subdivision. C. Future availability of Sanitary Sewer At the time that this report was prepared, there are no known plans for any sanitary sewer systems in this area. In the event a community sewer system collection line is constructed within four hundred (400) feet of the PUD, the lot(s) shall abandoned their OWTS and obtain service from that community system. V. Conclusions A. Compliance with the Weld County Code 1. The stormwater drainage design is in compliance with the Weld County Code. IV. References a. Weld County Code, Chapter 30 b. Munsell Soil Color Book, revised 2O09/Produced 2013 c. USDA Natural Resource Conservation Service, Web Soil Survey, National Cooperative Soil Survey, Accessed March 2017. Legal Description: Job No: Investigation Date: R 17 Log 1 of 2 (South) 2016-036 10/25/2016 Loess Organic Mat'I Bedrock J Slope %: Varies 2% to 4% a3ua;sisuo3 (1} CO LL Firm Extremely Firm Rigid E LL ly Firm :remely Firm lid • Rigid ly l CU CU W NCD 0 CO E Q Q Cali _J LL J g - - - `.J epe lamp' Ali . CU 0 O t) o I- Q CD Q 0 C-° 08001 a) Q 2 Le CO Q J CZ Q �'5' IIT0 —r C!7 J 2 J 2 (I. J [Prismatic C C CC edegg jean43n4 u!EJO apuis Massive (> 1%) c 11 co o •c c c Eva o c t3 E' co o ., .C C[� 2 CO 0 s 4.0 a c o a , N- 13 CD 0 peAe g peAsis pah0I0 paAais peAsto suoiiaidao suopidea suoi eidea suopidea suoijeidea suoReJlueouoo suon.eiwaouco suoRanueouoo suo!jeilueouoo suopequeouoo o z z k/Side Slope Foot SIG Lacusi J. 2 O 03 i a 0 co in (s)ioioo xia;�W qe ix w ix >- Q c re > in '' ; ; a U) Soil Parent Material(s) [Mark all that apply] Till Outwasl Notes: E CH 30%), 35 >- 0 r r; Qom C3 Rock ragment% in V I in V V 10 co (69%), 73 -Vona Loamy Sand < es, T., - 0 - a , I co � CO ce - x 0 Slick Sticky tI - Client/Address: Richard Hien; Southwest Corner of WCI Or tI Slid L e- E co co e75` J lima 0) CO II C2 C ii _o et 5 JD - 2 ii L 03 i- a 7.0- 72 -Von Landscape Notes: _ I Hn c r� a) � 2 Iii �y 0 a Date: 10/2512016 Loess Organic Matti Consistence C L LL Friable 1 .remely Firm :remely Iyl mel 0 ti3 0 0 Q CO E 0 CO O J '` !1- - - - 0 0 J 0 J 'L LL L LL 0 J _c LL .__.! --- - - - - - - , uctural ;rade i a d3 e}e. Slope Shad t'Q ci Itt 2 cn LUUt t Client/Address: Legal Description: Job No: Investigation Richard I -lien• Southwest Corner of WCR 26/WCR 17 Lo 2 of 2 North', 2016-036 Q edam Iein na; ranular locky Prismatic i Prismatic Sinle Grain Massive Amools U!BJO albui9 opwspd A>ioole Aield iei n ueaO L 0 c C L Cl.J > _> wninn I Toe Slope I - - _S to 4.y a. C) 0 Redox Kind(s) peAele [ may, �y PaAal0 t paAal0 j �^+, paA►elo j i PeAelo suoiialdea suoRaideci suo!laldacj suoilaldaa suoi1a,dacj a oi suoRequaouco suoileilueouo0 suo!TBJjua0Uo3 suOQQaJTuaoua3 suOREJTu9OuoO Loamy Sand a) 4) 0 z 0 z 0 0 CD liS *an 0o 7) LL z W 0 O 4 (s)iolo3 xi.14BW V' ix P ce >_ o r � re >- 0 i in w >a o ti re Soil Parent Material(s) [Mark all that apply] Till Outwash Notes: (30%), 35 -I LE CI (Landscape Position (Circle one) Summit Back/Sid 0 >- o r r r r TACT] Rock ragment% 3t3 IC) V inIIC) V V IC) V vnsu► 110 N N M ITYI Slick Sticky Sticky 1 Loamy sand 0 to 3% slob Et0�'fryPi. c 0 % .cn r c)ff, .1 C13 O J +4 a'` ❑ +I BO O X01 Moisture= Slic Ribbon= 1-3/i • � CO II 22 to o ti is . II 2 to re= 2 C 4D a -v •.a c' / - - _ - IN to o 400 10' 22" N M iT APS OCIT M HOC .t'S ot0T 0L0ttt* 4 County Rc.adr2€ OLZ/J PP OaLlitrI7 CCLI WI/ OLO/i'tt meow 40° 10'22°N [n 00 ric E. a cr E. isa rim its ki 2 I 5 8 -- Pa s 0 ai zQ fit .,O£/PS O KI CO r t. r CD 0 C`+I en 03 {) CO a cp 0 16 C a z 0 o .E 0u) a tort 413 03 0 L to CC O t, A- 3 co a E. O ua O 0 0 a ci O 'O a, 0 O O C 0 Cn O 0 0 MAP INFORMATION MAP LEGEND 4-I •0 a E cn .c E 8 as in di a) _a r C 2 Y W co Area of Interest (AO1) a E c 0 0 r C Area of Interest (AOl) cn CU 0 V O C 0 2 o Q1 E ea • C CO) ca cn Esc -coCD0 O C CD -a. co 0 it L E .O M 43 4- > # 0 0 0 _cam c -o a. 5 .a # cO 0 Ca E CL Boas till E c c 0 ''� C so (i) a} EE C •0 03 0 Eai co tiC) WC c' 3 w E = a CO 63 05 Soil Rating Polygons 2 co of 434 0 f a .43 tot .C 0. Ctl sc [a c �u a u� 0 C CD N 2 61 co a a E Soil Rating Lines sE CO C 0 Cu a) 0 u] m U 0 a c: mit ZD co d 0 W CO. Y 43 0 cc es w .O C nw o o u7� S Fla t 0 o J 1 I- 0 8 a? 0 ca Cn O n co ca 11) )�jpi O .iiY E -o co ai W O al o Ct. in co V en 0 0 C ca o O 2 c 0 co •5a) mac CO a) ci ra o 1111! m to '- � 2 C d 2a. CO "13 C.) tU .II co (13 co C I- co 46 1 Soil Rating Points O 2 U3 to CO a) tC CO a�3 tr aD - W 0 U — o c E a� E.0 .O ay at- "L -o fl. •o -o 0 0 O .s CL O a. U) a 0 0 C � co •64 .0 CIO 0 CD Q a) as tn 5— 0 J ■ O ■ 0 Q) u7 oQ -a 00 N O la tea) 141 yr- CC 0 Ser i•0 a) creg N L- uo „ o O) Not rated or not available Water Features ows) for map scales a) CCIS O U) a a) n ca Via`, 0, ten co a cp td Ec' o Inw 5 1P co a U V C co Co CO Transportation Mar 16, 2012 —Apr images were photographed: co Interstate Highways 1 a) a") ra cn au O .� CFSaM E cip •O ON E ' n `o ar E to o C CO its O CD T1 faui 't E E — to cocn •°a c w .n N c O 'o a Eat a RCS {ai C'10 o 0 CD .C O E o N 0 aco ►. .a) Local Roads Corrosion of Concrete Weld County, Colorado, Southern Part Corrosion of Concrete Corrosion of Concrete - Summary by Map Unit — Weld County, Colorado, Southern Part (CO618) Map unit symbol Map unit name Rating Acres in AOl Percent of AOI 35 72 73 Loup-Boel loamy sands, Low 0 to 3 percent slopes 4 Vona loamy sand, 0 to 3 Moderate percent slopes Vona loamy sand, 3 to 5 Moderate percent slopes Totals for Area of Interest Description 0.1 7.8 3.2 11.0 0.5% 70.7% 28.8% 100.0% "Fisk of corrosion" pertains to potential soil -induced electrochemical or chemical action that corrodes or weakens concrete. The rate of corrosion of concrete is based mainly on the sulfate and sodium content, texture, moisture content, and acidity of the soil. Special site examination anddesign may be needed if the combination of factors results in a severe hazard of corrosion. The concrete in installations that intersect soil boundaries or soil layers is more susceptible to corrosion than the concrete in installations that are entirely within one kind of soil or within one soil layer. The risk of corrosion is expressed as "low," "moderate," or "high." Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff.. None Specified Tie -break Rule: Higher USDA Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/20/2017 Page 3 of 3 4A° 1a 31' N 4O 10* 2Z N 9 507803 IR I Septic Tank Absorption Fields —Weld County, Colorado, Southern Part Map Sde: 1:2,030 ifprinted on A tandsaipe (11" x 8.5'1 sheet. N 0 30 60 120 Feet 0 50 100 200 300 Map projection: Web Mercator Corner coordinates: WGS84 Edge ties: UTM Zone 13N WGS84 Metes use , Natural Resources Conservation Service 180 Web Soil Survey National Cooperative Soil Survey 509120 508160 104. 54' it W 9/2212016 Page 1 of 5 40* 173r N 405 10' 27 N Septic Tank Absorption Fields —Weld County, Colorado, Southern Part MAP LEGEND Area of Interest (AOl) Area of Interest (A01) Soils Soil Rating Polygons Very limited Somewhat limited Not limited Not rated or not available Soil Rating Lines oast Very limited • • Somewhat limited — Not limited • • Not rated or not available Soil Rating Points S O • Very limited Somewhat limited Not limited © Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Ili Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of sail line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL, http://websoilsurvey.nrcs.usda.gov Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 14, Sep 22, 2015 Soil map units are labeled (as space allows)for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Mar 16, 2012 —Apr 13, 2012 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. USDA Natural Resources -- Conservation Service Web Soil Survey National Cooperative Soil Survey 9/22/2016 Page 2of5 Septic Tank Absorption Fields Weld County, Colorado, Southern Part Septic Tank Absorption Fields Septic Tank Absorption Fields Summary by Map Unit — Weld County, Colorado, Southern Part (CO618) Map symbol unit Map unit name Rating Component name (percent) Rating reasons (numeric values) Acres in A01 Percent of AOl 35 Loup-Boel sands, percent loamy 0 slopes to 3 Very limited Loup (55%) Depth saturated (1.00) to zone 0.1 0.6% Seepage, layer (1.00) bottom Boel (35%) Depth saturated (1.00) to zone Seepage, bottom Layer (1.00) Filtering capacity (1.00) 72 Vona loamy sand, percent 0 to 3 slopes Not limited Vona (85%) 7,7 69.3% 73 Vona loamy sand, 3 to percent slopes 5 Not limited Vona (85%) 3.4 30.2% Totals for Area of Interest 11,1 100.0% Septic Tank Absorption Fields— Summary by Rating Value Rating Acres in AO1 Percent of AO1 Not limited 11.1 99.4% Very limited 0.1 0.6% Totals for Area of Interest 11..1 100.0% USDA Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 9/22/2016 Page 3of5 Septic Tank Absorption Fields —Weld County, Colorado, Southern Part 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 of 24 and 60 inches is evaluated. The 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 distribution lines. In 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 Web Soil Survey a Conservation Service National Cooperative Soil Survey 9/22/2016 Page 4 of 5 AeR Septic Tank Absorption Fields Weld County, Colorado, Southern Part Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff None Specified Tie -break Rule: Higher USDA Natural Resources Web Soil Survey M— Conservation Service National Cooperative Soil Survey 912212016 Page 5 o15 40° 10'31"N 40° 10.21" N 507800 50792a Depth to Water Table ---Weld County, Colorado, Southern Part '1i in —se stisAhr rumens - T l I I l l 507840 507880 507920 507960 503040 508040 Map Scale; 1:2,040 if printed on A bndscape (11"x 8.5") sheet. S N 0 30 60 Feet 0 50 100 200 300 Map pq? n: Web Mentor Corner coordinates; WGS84 Edge tics: UTM Zone 13N WGS84 Myers USDA Natural Resources "i Conservation Service 120 180 Web Soil Survey National Cooperative Soil Survey L J I 508120 508160 508200 10e 54' ir W 508240 40° 10I 3i' N - M1 9/22/2016 Page 1 of 3 40° 1021"N Depth to Water Table —Weld County, Colorado, Southern Part MAP LEGEND MAP INFORMATION Area of Interest (AOl) Area of Interest (AOl) Soils Soil Rating Polygons 0-25 MB tt Q II 25 - 50 50 - 100 100- 150 150 - 200 > 200 Not rated or not available Soli Rating Lines ,.w 0-25 0 , 25.50 ,. X 50 - 100 embe 100- 150 iser 150 - 200 or-seoimise > 200 Not rated or not available Soil Rating Points • d D ■ • 0-25 25 - 50 50 - 100 100-150 150 - 200 > 200 D Not rated or not available Water Features Streams and Canals Transportation ♦.�..f Rails ago interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your Aal were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection. should be used if more accurate calculations of distance or area are required. This product is generated from the USDA -NP CS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 14, Sep 22, 2015 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Mar 16, 2012 —Apr 13, 2012 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. USDA Natural Resources Web Soil Survey ma Conservation Service National Cooperative Soil Survey 9/22/2016 Page 2of3 Depth to Water labia Weld County, Colorado, Southern Part Depth to Water Table Depth to Water Table— Summary by Map Unit Weld County, Colorado, Southern Part (CO618) — Map unit symbol Map unit name Rating (centimeters) Acres in AO1 Percent of AOI 35 Loup-Boel 0 to 3 percent loamy sands, slopes 23 0.1 0.6% 72 Vona loamy percent sand, slopes 0 to 3 >200 7.8 66.7% 73 Vona loamy sand, percent slopes 3 to 5 >200 3.8 327% Totals for Area of Interest 11.6 100.0% Description "Water table" refers to a saturated zone in the soil. It occurs during specified months. Estimates of the upper limit are based mainly on observations of the water table at selected sites and on evidence of a saturated zone, namely grayish colors (redoximorphic features) in the soil. A saturated zone that lasts for less than a month is not considered a water table. This attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used. Rating Options Units of Measure: centimeters Aggregation Method: Dominant Component Component Percent Cutoff None Specified Tie -break Rule: Lower Interpret Nulls as Zero: No Beginning Month: January Ending Month: December USDA Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 9/22/2016 Page 3 of 3 Arr- rip Hello