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Engineering Properties---Weld County,Colorado,Northern Part Koskie Pit 2020 Amendment Report—Engineering Properties Absence of an entry indicates that the data were not estimated. The asterisk'*'denotes the representative texture; other possible textures follow the dash. The criteria for determining the hydrologic soil group for individual soil components is found in the National Engineering Handbook, Chapter 7 issued May 2007(http://directives.sc.egov.usda.gov/ OpenNonWebContent.aspx?content=17757.wba). Three values are provided to identify the expected Low(L), Representative Value (R), and High (H). Engineering Properties—Weld County,Colorado,Northern Part Map unit symbol and Pct.of Hydrolo Depth USDA texture Classification Pct Fragments Percentage passing sieve number— Liquid Plasticit soil name map glc limit y index unit group Unified AASHTO >10 3-10 4 10 40 200 inches inches In L-R-H L-R-H L-R-H L-R-H L-R-H L-R-H L-R-H L-R-H 20—Cascajo gravelly sandy loam,5 to 20 percent slopes Cascajo 85 A 0-3 Gravelly sandy loam GC,GC- A-1,A-2 0-5-10 0-8-15 60-70- i 55-65- 35-43- 20-25- 25-28 5-8-10 GM, 1 80 75 50 30 -30 i SC,SC- SM 3-24 Very gravelly sandy GM,GP, A-1 0-0-0 0-8-15 30-40- 25-38- 15-23- 0-10-20 — NP loam,very GP-GM 50 50 30 gravelly loamy sand,very gravelly sand 24-60 Very gravelly loamy GP,GP- A-1 0-0-0 0-8-15 30-45- 25-43- 15-23- 0-5-10 — NP sand,very GM,SP, 60 60 30 gravelly sand, SP-SM gravelly sand 29—Haverson loam,0 to 3 percent slopes Haverson 90 B 0-12 Loam CL,CL- A-4 0-0-0 0-0-0 100-100 100-100 85-90- 60-68- 25-28 5-8-10 ML -100 -100 95 75 -30 12-60 Stratified sandy CL,CL- A-6,A-4 0-0-0 0-0-0 95-98-1 75-88-1 65-78- 45-53- 25-30 5-10-15 loam to loam ML,SC, 00 00 90 60 -35 SC-SM USDA Natural Resources Web Soil Survey 3/24/2020 Conservation Service National Cooperative Soil Survey Page 4 of 6