2019-11-27_PERMIT FILE - M2019058 ‎(20)‎

• Permit No: M2019058
• IBM Index Class Name: Permit File
• Doc Date: 11/27/2019
• Doc Name Note: Appendix 1 - Environmental Resource Report
• Doc Name: Application
• From: Colorado Sand Company LLC
• To: DRMS
• Email Name: MAC
• Email Name: BFB
• Media Type: D
• Archive: No

Appendix-11
Keenesburg Project RETTEW Project No.114782000
Colorado Sand Company LLC April26,2019
The Plains pocket gopher(Geomys bursarius)is the most likely of the four Colorado pocket gopher species
to be found in the project area because it prefers deep sandy and silty soils. Pocket gophers reduce
productivity of portions of native grasslands by 20 to 50 percent (CSU, 2016). Evidence of small mammal
burrows was observed at several locations across the project area during the site investigation.The Plains
pocket gopher is not listed by the State of Colorado or protected under state law.
4.0 SOIL ASSESSMENT
4.1 Topography and Drainage
The majority of the pr ject area consists of gently rolling, grazed rangeland. Review of the Tampa and
Klug Ranch, Colorado United States Geological Survey (USGS) 7.5-minute topographic quadrangles
(Appendix A, Figure 1), shows an elevation between 4,950—4,600 feet above mean sea level. Drainage
from the project area generally flows north from the site.
4.2 Soil Suivey
Mapping depicting soil init boundaries within the project area is provided in Appendix A, Figure 3.A U.S.
Department of Agricult ire (USDA) Natural Resources Conservation Service Custom Soil Resource Report
is provided in Appendix E.A summary of the mapped soils is also provided in Table 4.1. Most of the project
area consisted of sandy soils, although Loup-Boel loamy sands, 0-3% slopes occur in swales and
drainageways in landfo m settings and are mapped within the drainage running through the east portion
of Sections 1 and 12. Site specific soil information is also contained on the Sample Point Data Forms
included in Appendix C.
Table 4.1-Summary of Mapped Soils Data
Map Unit Typical Soil Profile
Symbol Map Unit Name Drainage Class
y (in inches)
Loup: H1—0 to 16; loamy
sand
35 Loup-Boel Ioamy sands, 0 to 3%slopes H2—16 to 40; loamy sand Poorly drained
H3—40 to 60; sandy loam
Boel: H1—0 to 14; loamy sand
H2—14 to 60; loamy sand
H1—0 to 10; loamy sand
45 Oiney to my sand, 3 to 5%slopes H2—10 to 20; sandy clay loam Well drained
H3—20 to 25; sandy clay loam
H4—25 to 60;fine sandy loam
H1—0 to 22; sand
49 Osgood sand, 0-3%slopes H2—22 to 34; sandy loam Well drained
H3—34 to 60; sand
A—0 to 5; sand
69 Valent sand, 0-3%slopes AC—5 to 12; sand Excessively
C1-12 to 30; sand drained
C2—30 to 80; sand
A—0 to 5; sand
70 Vale t sand, 3-9%slopes AC—5 to 12; sand Excessively
C1-12 to 30; sand drained
C2—30 to 80; sand
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