The URL can be used to link to this page

Browse Search

Home My WebLink About20180880.tiffAG ROfessionals DEVELOPERS OF AGRICULTURE Geology Report Weld County Change of Zone Application Prepared for Judy & James Docheff 4 H September 11, 2017 AGPROfessionals, LLC 3050 67th Avenue, Suite 200 Greeley, Colorado 80634 ,Attn: Ms. Kelsey Bruxvoort ReGeology Report Docheff Property (Part of the SW'A, Section 30, T3N, R68W) Lot B, RE -3841, Weld County, Colorado Soilogic Project ft 17-1288 Ms. Bruxvoort: Soilogic, Inc. (Soilogic) personnel have completed the geologic evaluation you requested for the above referenced parcel. Our evaluation was completed through review of mapped and published information concerning site soil and groundwater conditions. A list of the references reviewed is included with this report. The subject property includes Lot B, of Recorded Exemption RE -3841, a total of approximately 32 acres, located in a portion of the Southwest 1 4 of Section 30, Township 3 North, Range 68 West of the 6th Principal Meridian in Weld County, Colorado. We understand the site may be rezoned as agricultural. Building and septic system construction is not anticipated at this time. Based on aerial photography, the site appears to consist of pasture land and is vegetated in grasses. The site contains a gentle overall slope downward to the east with the maximum difference in ground surface elevation across the parcel estimated to be on the order of approximately 35 feet based on review of topographic maps of the area. A lower lying marshy area that appears to pond water at times throughout the year is generally centrally located north to south and at the east end of the subject property. The included soil type delineation diagram outlines those soil groupings identified at the site by Weld County Soil Conservation Service (SCS) maps. SCS descriptions of those soil types are included with this report. In general, the near surface soils at this site consist of low plasticity silty to sandy clay from the Wiley -Colby complex. About 13% Soilogic, Inc. 3522 Draft Horse Court s Loveland, CO 80538 • (970) 535-6144 P.O. Box 1121 is Hayden, CO 81639 . (970) 276-2067 Geology Report Docheff Property (Part of theSW1/4, Section 30, T3N, R68W) Lot B, RE -3841, Weld County, Colorado Soilogic # 17-1288 2 of the site located along the eastern boundary of the property falls within the Aquolls and Aquepts series. The near surface site soils in the Wiley -Colby series consist of colian deposits Holocene and Upper Pleistocene geologic periods. Soils in the limited area of the Aquolls and Aquepts series are variable and unknown. Geologic maps of the area indicate the overburden soils are underlain by the upper unit of the Pierre Shale bedrock formation from the Upper Cretaceous period consisting of claystone, siltstone and sandstone of varying composition. Mapped information indicates the property is not in an area identified as being flood prone and would be expected to have groundwater at depths ranging from approximately 5 to 20 below ground surface with seasonal high groundwater levels anticipated to be less than 10 feet. Seasonal high groundwater levels in the range of 0.5 to 1.5 feet below ground surface are listed for soils in the Aquolls and Aquepts series for a limited area of the site. According to SCS data, the depth to bedrock would be expected to be greater than 5 feet. During our review of available site data, we did not identify other potential geologic hazards as outlined in 1-14B. 1041. In addition, we did not identify economically recoverable gravel resources at this site. We appreciate the opportunity to be of service to you on this project. If we can be of further service to you in any way or if you have any questions concerning the enclosed information, please do not hesitate to contact us. Very Truly Yours, Soilogie, Ines Wolf von Carlowitz, P.E. Principal Engineer Geology Report Docheff Property (Part of the `1.4, Section 30, T3N, R6SW) Lot B, R -38 41, Weld County, Colorado Soilogic # 17-1288 3 REFERENCES 1. Colton R.B. and Harold R. Fitch, 1974, Ma ho in Potential Sources of Gravel and Crushed -Ito l e in the Boulder -Fort , olli _ s- reeleArea Front Ran e Urban Corridor. Colorado: U.S. Geological Survey Miscellaneous Investigation Series Map 1-855-D. 2. Colton R.B., 1978, Geologic Map of _ the _ Boulder -Fort Collins- reeler Area Colorado: U.S. Geological Survey Miscellaneous Investigation Series Map I -955-G. 3. Hershey LA. and Schneider, Jr. PA., 1972, Geologic Map of the Lower Cache La Poudre River Basin, North-Central Colorado: U.S. Geological Survey Miscellaneous Investigation Series Map 1-687. 4. Hillier D. and Schneider, Jr. P.A., 1979, Depth to the Water Table in the Boulder -Fort Collins -Greeley Area, Front Range Urban Corridors Colorado: U.S. Geological Survey Miscellaneous Investigation Series Map 1-855-I. 5. United States Department of Agriculture Soil Conservation Service and Forest Service in Cooperation with Colorado Agricultural Experiment Station, 1980, Soil Survey of Weld County Area, Colorado, Maps 239-812/3. 6. Schneider, Jr. P. A., 1983 Shallow Groundwater in the Boulder -Fort Collins -Greeley Area, Front Range Urban Corridor. Colorado 1975-77: U.S. Geological Survey Water Resources Investigations Report 83-4058. 7. Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Sunrey. Available online at http://websoilsurvey.nrcs.usda.gov accessed (August 19, 2015). 40° 1.1' 46' N +Ills il' 3r N 105° 3'25'\ 0 r w 495'183 Soil Map —Weld County, Colorado, Southern Part (Dooheff COZ) *Si .T - T = _� AP!_ : a ll „or,. tr.: ea" laallr tetatp.±, s ra s4 N -....w. -s saw m - IhtSPISIT•fl.-.1 T.._ r � _ 49516D N A 4952413 495323 495000 Map Scale: 1:3,580 if printed en A landscape (11ux8.5") a.a") . 495000 495883 MetEIS 0 50 lea 200 IN) Feet 0 150 600 900 Map cr'r: Web Mereatur Comer cooinates: WGSS4 Edge tics: urri Zone 13N WG584 ..& Natural Resources a Conservation Service 495583 Web Soil Survey National Cooperative Soil Survey h 495540 4e o 49588 C 105° 2'5r"v 401' 1114e• N 0 V 40° 11'2114 105°252'rW 9/11/2017 Page 1 of 3 Soil Map —Weld County, Colorado, Southern Part (Docheff COZ) MAP LEGEND Area of Interest (AOI) Area of Interest (AOl) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Row Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot 0 ?MI �tr Spoil Area Stony Spot Very Stony Spot Wet Spot Other a Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography J 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 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: 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 -N RCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 15, Sep 22, 2016 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 30, 2014 —Sep 18, 2014 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 9/1112017 Page 2 of S Soil Map —Weld County, Colorado, Southern Part ❑ocheff COZ Map Unit Legend Weld County, Colorado, Southern Part (C0618) [ Percent of AOl Map Unit Symbol Map Unit Name 1 Acres in A01 3.8 13.2% 4 Aquolls and Aquepts, flooded 82 Wiley -Colby percent slopes complex, 1 to 3 23.0 79.5% 83 Wiley -Colby percent complex, slopes 3 to 5 2.1 7.3% Totals for Area of Interest 28.9 100.0% USDA Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 9/11/2017 Page 3 of 3 Map Unit Description: Aquolls and Aquepts, flooded --Weld County, Colorado, Southern Part Docheff COZ Weld County, Colorado, Southern Part 4—Aquolls and Aquepts, flooded Map Unit Setting National map unit symbol: 3621 Elevation: 3,600 to 4,700 feet Mean annual precipitation: 12 to 16 inches Mean annual air temperature: 50 to 55 degrees F Frost -free period: 100 to 165 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar soils: 55 percent Aquepts, flooded, and similar soils: 25 percent Minor components: 20 percent Estimates are based on observations, descriptions, and transacts of the mapunit. Description of Aquolls Setting Landform: Depressions, drainageways, i nageways, plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile HI - 0 to 8 inches: variable H2 - 8 to 60 inches: stratified sandy loam to clay Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Runoff class: Very low Capacity of the most limiting layer to transmit water (ksat): Moderately low to high (0.06 to 6.00 inlhr) Depth to water table: About 6 to 36 inches Frequency of flooding: Frequent Frequency of ponding: None Calcium carbonate, maximum in prole: 10 percent Salinity, maximum in prole: Moderately saline to strongly saline (8.0 to 16.0 mmhoslcrn ) Sodium adsorption ratio, maximum in profile: 5.0 Available water storage in profile: Low (about 4.7 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w USDA Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 9/11/2017 Page 1 of 2 Map Unit Description: Aqualls and Aquepts, doodad --Weld County, Colorado, Southern Part Docheff COZ Hydrologic Soil Group: D Ecological site: Salt Meadow (R067BY035C0) Hydric soil rating: Yes Description of Aquepts, Flooded Setting Landfon'n Stream terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile HI - 0 to 8 inches: variable H2 - 8 to 60 inches: stratified sandy loam to clay Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): Moderately low to high (0.06 to 6.00 i nth r) Depth to water table: About 6 to 36 inches Frequency of flooding: Frequent Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Moderately saline to strongly saline (8.0 to 16.0 mmhoslcm) Sodium adsorption ratio, maximum in profile: 5.0 Available water storage in profile: Low (about 4.7 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigafed): 6w Hydrologic Soil Group: D Ecological site: Wet Meadow (R067BY038CO) Hydric soil rating: Yes Minor Components Haverson Percent of map unit: 10 percent Hydric soil rating: No Thedalund Percent of map unit 10 percent Hydric soil rating: No Data Source Information Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 15, Sep 22, 2018 LsDA Natural Resources Web Soil Survey dal Conservation Service National Cooperative Sail Survey 9/11/2017 Page 2of2 Map Unit Description: Wiley -Colby complex, 1 to 3 percent slopes --Weld County, Colorado, Docheff COZ Southern Part Weld County, Colorado, Southern Part 82 Wiley -Colby complex, to 3 percent slopes Map Unit Setting National map unit symbol: 3643 Elevation: 4,850 to 5,000 feet Mean annual precipitation: 12 to 16 inches Mean annual air temperature: 4$ to 54 degrees F Frost -free period: 135 to 170 days Farmland classification: Prime farmland if irrigated Map Unit Composition Wiley and similar soils: 60 percent Colby and similar soils: 30 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transacts of the mapunit. Description of Wiley Setting Landforr'n: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Calcareous eolian deposits Typical profile HI - 0 to 11 inches: silt loam H2 - II to 60 inches: silty clay loam H3 - 60 to 64 inches: silty clay loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer- to transmit water (ksat): Moderately high to high (0.60 to 2.00 in/Pr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity maximum in profile: Nonsaline nsaline to very slightly saline (0.0 to 2.0 mmhoslcm) Available water storage in profile: High (about 11.7 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonir gated): 4e Hydrologic Soil Group: B Ecological site: Loamy Plains <R067BY002CO) USDA Natural Resources Web Soil Survey .g. Conservation Service National Cooperative Soil Survey 9/11/2017 Page 1 oft Map Unit Description: Wiley -Colby complex, I to 3 percent slopes --Weld County, Colorado, Docheff COZ Southern Part Hydric soil rating: No Description of Colby Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Calcareous eolian deposits Typical profile HI - g to 7 inches: loam H2 - 7 to 80 inches: silt loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (sal): Moderately high to high (0.57 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of pondirg: None Calcium carbonate, maximum in profile: 15 percent Available water storage in pm fife: High (about 10.6 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (non irrigated): 4e Hydrologic Soil Group: B Ecological site: Loamy Plains (ROO7BYOO2CO) Hydric soil rating: No Minor Components Heldt Percent of map unit: 4 percent Hydric soil rating: No Weld Percent of map unit 4 percent Hydric soil rating: No Keith Percent of map unit 2 percent Hydric soil rating: No Data Source Information Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 15, Sep 22, 2016 USDA Natural Resources Web Soil Survey sla Conservation Service National Cooperative Soil Survey 9/11/2017 Page 2oft Map Unit Description: Wiley -Colby complex, 3 to 6 percent slopes --Weld County, Colorado, Docheff COZ Southern Part Weld County, Colorado, Southern Part 83 —Wiley -Colby complex, 3 to 5 percent slopes Map Unit Setting National map unit symbol: 3644 Elevation: 4,850 to 5,000 feet Mean annual precipitation: 12 to 16 inches Mean annual air temperature: 48 to 54 degrees F Frost -free period: 135 to 170 days Farmland classification: Farmland of statewide importance Map Unit Composition Wiley and similar soils: 55 percent Colby and similar soils: 30 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. unit. Description of Wiley Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Calcareous eoliari deposits Typical profile HI - 0 to 11 inches: silt loam H2 - 11 to 60 inches: silty clay loam H3 - 60 to 54 inches: silty clay loam properties and qualities Slope: 3 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (ksat): Moderately high to high (0.60 to 2.00 infhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhosicm) Available water storage in profile: High (about 11.7 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (non/rrigated): 4e Hydrologic Soil Group: B Ecological site: Loamy Plains (RO67BYOO2 CO) Lsrm Natural Resources Web Soil Survey a Conservation Service National Cooperative Soil Survey 9/11/2017 Page 1 of 2 Map Unit Description: Wiley -Colby complex, 3 to 5 percent slopes --Weld County, Colorado, Docheff COZ Southern Part Hydric soil rating: No Description of Colby Setting Landforrn: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Calcareous eolian an deposits Typical profile - g to 7 inches: loam H2 - 7 to 60 inches: silt loam Properties and qualities Slope: 3 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 2.00 infhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in pmfile: 15 percent Available water storage in profile: High (about 10.6 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Loamy Plains (R067BY002CO) Hydric soil rating: No Minor Components Heldt Percent of map unit: 9 Hydric soil rating: No Weld Percent of map unit: 6 Hydric soil rating: No percent percent Data Source Information Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 15, Sep 22, 2016 USDA, Natural Resources Web Soli Survey all Conservation Service National Cooperative Soil Survey 9/11/2017 Page 2 oft Hello