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Home My WebLink About20141750.tiff EXHIBIT I Soil Information At the end of this exhibit are some printouts from the NRCS website that describe many of the typical characteristics of the soils present on the site. Please refer to Exhibit C-2, Soils Map, for an illustration showing the distribution of the soils. According to the Web Soil Survey (United States Department of Agriculture, NRCS, 2004) of the proposed permit area, there are three major soil types within the proposed project site: 1. Altvan and Ascalon fine sandy loams and 2. Peetz gravely sandy loam. The location of these soil types is illustrated on Exhibit C-2, Soils Map. Traditional organic topsoil on most of the site is thin or non-existent. Most of the soils are shallow to deep loams that are well drained. Over most of the identified sand and gravel deposit is a loamy, wind-mixed veneer layer of soil overburden material varying in depth from less than one inch to six feet. The soil overburden material likely developed from alluvial and eolian deposits of clay, silts, and sands. Over time, erosive forces of wind and water have influenced the soils on the site. Mobile soil particles, such as silt and clay, have eroded from higher topographic positions and have been re-deposited in lower areas. Therefore, swale areas may have finer textured soils than ridgetops. Altvan and Ascalon Fine Sandy Loams The Altvans and Ascalons are found on level and nearly level (0 to 6 percent slopes) land forms. Located on loamy plains throughout the area, these soil types are well drained and classified as Hydrologic Soil Group B. They are also the most dominant soil types within the proposed project site. The water table is typically more than 80 inches below the soils. Areas containing these soils are used mainly for rangeland and wildlife habitat. Their water holding capacity is low to moderate and typically do best as seeded rangeland. These soils produce low plant densities of Blue Grama/Buffalo Grass sod with excessive ground litter. Peetz Gravely Sandy Loam The Peetz is found on 5 to 20 percent slopes and located on land form breaks and ridges. This soil type is somewhat excessively drained and classified as Hydrologic Soil Group A. The water table is typically more than 80 inches below the soil. Areas containing this soil type are used mainly for rangeland and wildlife habitat. Its water holding capacity is low and typically supports Blue Grama sod with bare ground, cryptogam, and annual plant communities. Connell Carr Pit OR,NS 112 Permit Application Page 21 Map Unit Description:Altvan fine sandy loam,0 to 6 percent slopes---Weld County,Colorado, Northern Part Weld County, Colorado, Northern Part 1—Altvan fine sandy loam, 0 to 6 percent slopes Map Unit Setting Elevation: 3,500 to 5,500 feet Mean annual precipitation: 14 to 16 inches Mean annual air temperature:46 to 48 degrees F Frost-free period: 130 to 150 days Map Unit Composition Altvan and similar soils: 85 percent Minor components: 15 percent Description of Altvan Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Calcareous gravelly alluvium Properties and qualities Slope: 0 to 6 percent Depth to restrictive feature: 20 to 40 inches to strongly contrasting textural stratification Drainage class:Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Available water capacity: Low(about 4.6 inches) Interpretive groups Farmland classification: Farmland of statewide importance Land capability classification (Irrigated): 3e Land capability(nonirrigated):4e Hydrologic Soil Group: B Ecological site: Loamy Plains (R067BY002CO) Typical profile 0 to 6 inches: Fine sandy loam 6 to 22 inches: Sandy clay loam 22 to 27 inches: Sandy clay loam 27 to 60 inches: Gravelly coarse sand Minor Components Ascalon Percent of map unit: 5 percent ISNatural Resources Web Soil Survey 11/20/2013 Conservation Service National Cooperative Soil Survey Page 1 of 2 Map Unit Description:Ascalon fine sandy loam,0 to 6 percent slopes---Weld County,Colorado, Northern Part Weld County, Colorado, Northern Part 4—Ascalon fine sandy loam, 0 to 6 percent slopes Map Unit Setting Elevation:4,500 to 6,500 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 46 to 57 degrees F Frost-free period: 130 to 160 days Map Unit Composition Ascalon and similar soils: 85 percent Minor components: 15 percent Description of Ascalon Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Calcareous loamy alluvium Properties and qualities Slope: 0 to 6 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Moderate(about 6.9 inches) Interpretive groups Farmland classification: Farmland of statewide importance Land capability classification (irrigated): 3e Land capability(nonirrigated): 3e Hydrologic Soil Group: B Ecological site: Loamy Plains (R067BY002CO) Typical profile 0 to 8 inches: Fine sandy loam 8 to 22 inches: Sandy clay loam 22 to 60 inches: Sandy loam Minor Components Olney Percent of map unit 8 percent USDA Natural Resources Web Soil Survey 11/20/2013 Conservation Service National Cooperative Soil Survey Page 1 of 2 Map Unit Description:Cascajo gravelly sandy loam,5 to 20 percent slopes---Weld County, Colorado,Northern Part Weld County, Colorado, Northern Part 20—Cascajo gravelly sandy loam, 5 to 20 percent slopes Map Unit Setting Elevation:4,000 to 5,000 feet Mean annual precipitation: 11 to 13 inches Mean annual air temperature: 52 to 54 degrees F Frost-free period: 120 to 160 days Map Unit Composition Cascajo and similar soils: 85 percent Minor components: 15 percent Description of Cascajo Setting Landform: Breaks, ridges Down-slope shape: Linear Across-slope shape: Linear Parent material: Calcareous gravelly alluvium Properties and qualities Slope: 5 to 20 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Capacity of the most limiting layer to transmit water(Ksat):High(2.00 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 25 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Low(about 3.9 inches) Interpretive groups Farmland classification: Not prime farmland Land capability(nonirrigated): 7s Hydrologic Soil Group:A Ecological site: Gravel Breaks(R067BY063CO) Typical profile 0 to 3 inches: Gravelly sandy loam 3 to 24 inches:Very gravelly loamy sand 24 to 60 inches:Very gravelly sand Minor Components Stoneham Percent of map unit: 14 percent USDA Natural Resources Web Soil Survey 11/20/2013 a Conservation Service National Cooperative Soil Survey Page 1 of 2 Map Unit Description:Haverson loam,0 to 3 percent slopes---Weld County,Colorado,Northern Part Weld County, Colorado, Northern Part 29—Haverson loam, 0 to 3 percent slopes Map Unit Setting Elevation: 3,500 to 6,000 feet Mean annual precipitation: 12 to 17 inches Mean annual air temperature:46 to 54 degrees F Frost-free period: 125 to 180 days Map Unit Composition Haverson and similar soils: 90 percent Minor components: 10 percent Description of Haverson Setting Landform: Flood plains, stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Stratified, calcareous loamy alluvium Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water (Ksat): 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 ponding: None Calcium carbonate, maximum content: 15 percent Gypsum, maximum content: 1 percent Maximum salinity: Nonsaline to slightly saline(0.0 to 8.0 mmhos/cm) Available water capacity: High (about 9.6 inches) Interpretive groups Farmland classification: Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season Land capability(nonirrigated):4c Hydrologic Soil Group: B Ecological site: Overflow (R067BY036CO) Other vegetative classification: OVERFLOW(067BY036CO) Typical profile 0 to 12 inches: Loam 12 to 60 inches: Stratified sandy loam to loam Minor Components Nunn Percent of map unit:6 percent USDA Natural Resources Web Soil Survey 11120/2013 a Conservation Service National Cooperative Soil Survey Page 1 of 2 Map Unit Description:Otero sandy loam,3 to 9 percent slopes---Weld County,Colorado, Northern Part Weld County, Colorado, Northern Part 47—Otero sandy loam, 3 to 9 percent slopes Map Unit Setting Elevation:4,500 to 5,500 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature:48 to 52 degrees F Frost-free period: 130 to 180 days Map Unit Composition Otero and similar soils: 85 percent Minor components: 15 percent Description of Otero Setting Landform: Fans, plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Calcareous loamy alluvium and/or colluvium Properties and qualities Slope: 3 to 9 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline to very slightly saline(0.0 to 4.0 mmhos/ cm) Available water capacity:Very high (about 14.8 inches) Interpretive groups Farmland classification: Not prime farmland Land capability(nonirrigated):6e Hydrologic Soil Group: B Ecological site: Sandy Plains(R067BY024CO) Typical profile 0 to 5 inches: Sandy loam 5 to 60 inches: Fine sandy loam, sandy loam Minor Components Stoneham Percent of map unit:7 percent Kim Percent of map unit 3 percent USDA Natural Resources Web Soil Survey 1 112 0/2 01 3 age Conservation Service National Cooperative Soil Survey Page 1 of 2 Map Unit Description:Peetz gravelly sandy loam,5 to 20 percent slopes---Weld County, Colorado,Northern Part Weld County, Colorado, Northern Part 51—Peetz gravelly sandy loam, 5 to 20 percent slopes Map Unit Setting Elevation: 3,500 to 6,500 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature:48 to 50 degrees F Frost-free period: 120 to 150 days Map Unit Composition Peetz and similar soils: 80 percent Minor components:20 percent Description of Peetz Setting Landform: Breaks, ridges Landform position (two-dimensional): Backslope, shoulder Down-slope shape: Linear Across-slope shape: Linear Parent material:Calcareous gravelly alluvium Properties and qualities Slope: 5 to 20 percent Depth to restrictive feature: More than 80 inches Drainage class: Somewhat excessively drained Capacity of the most limiting layer to transmit water(Ksat): High(2.00 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:20 percent Available water capacity: Low(about 3.1 inches) Interpretive groups Farmland classification: Not prime farmland Land capability classification (irrigated):6e Land capability(nonirrigated):6e Hydrologic Soil Group:A Ecological site: Gravel Breaks(R067BY063CO) Typical profile 0 to 4 inches: Gravelly sandy loam 4 to 60 inches:Very gravelly sand Minor Components Wages Percent of map unit: 10 percent Altvan Percent of map unit 5 percent USDA Natural Resources Web Soil Survey 11/20/2013 a Conservation Service National Cooperative Soil Survey Page 1 of 2 Map Unit Description:Platner loam,0 to 3 percent slopes---Weld County,Colorado.Northern Part Weld County, Colorado, Northern Part 54—Platner loam, 0 to 3 percent slopes Map Unit Setting Elevation:4,500 to 5,900 feet Mean annual precipitation: 17 to 19 inches Mean annual air temperature:46 to 52 degrees F Frost-free period: 140 to 165 days Map Unit Composition Platner and similar soils: 80 percent Minor components:20 percent Description of Platner Setting Landform: Plains, stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Calcareous loamy alluvium Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Moderate (about 8.9 inches) Interpretive groups Farmland classification: Prime farmland if irrigated Land capability classification (irrigated):2e Land capability(nonirrigated): 3e Hydrologic Soil Group: C Ecological site: Loamy Plains (R067BY002CO) Typical profile 0 to 4 inches: Loam 4 to 24 inches: Clay 24 to 60 inches: Sandy loam Minor Components Ascalon Percent of map unit: 8 percent USDA Natural Resources Web Soil Survey 11/20/2013 a Conservation Service National Cooperative Soil Survey Page 1 of 2 Hello