2012-12-13_PERMIT FILE - M2012050 ‎(6)‎

• Permit No: M2012050
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/13/2012
• Doc Name: 112c APPLICATION
• From: OLDCASTLE SW GROUP
• To: DRMS
• Email Name: THM
• Email Name: GRM
• Media Type: D
• Archive: No

Map Unit Name
Map Unit
Symbol
Acres in AOI
Percent in AOI
Massadona Silty Clay Loam
Ba
7.6
6.7
Sagers Silty Clay Loam
Bc
77.3
68.7
Sagrilite Loam
Re
12.4
11.1
Turley Clay Loam
Tr
15.2
13.5
SOILS INFORMATION EXHIBIT I
After consulting with Russ Knight and Lenny Lang at the Natural Resources Conservation
Service (NRCS) in Grand Junction, Colorado, a customized soil report and map were developed
for the affected area using the NRCS Web Soil Survey (WSS) website. The four types of soil
that will be affected in the mining operation are:
Massadona Silty Clay Loam: These soils are deep (approximately 80 inches) and well drained.
They can support moderate farming of alfalfa and hay if irrigated. They formed in alluvium
derived from clayey shale and are considered moderately saline to strongly saline.
Sagers Silty Clay Loam: These types of soils are the most prevalent soils in the affected area.
They are deep (approximately 80 inches) and well drained. They formed in alluvium and slope
alluvium derived from calcareous shale and sandstone. Sagers are classified as slightly saline to
saline and have a slightly higher land capability classification than the Massadona Silty Clay
Loam if irrigated.
Sagrilite Loam: These types of soils are well drained and also up to 80 inches thick. It is non -
saline to slightly saline and is appropriate for moderate faming if irrigated.
Turley Clay Loam: These types of soils are derived from fan remnants and are the most suitable
for topsoil; they are well drained and non - saline.
In consultation with Kelly Johnson, master gardener at the Colorado State University Tri-River
extension office, a salinity test was run on the Massadona, Sagers and Sagrilite. These are the
only soil types that will be used for topsoil. Salinity is the main limiting factor in the Grand
Valley for establishing vegetation. Massadona has a salinity factor of 0.825, Sagers, has a factor
of 1.32 and Sagrilite has a factor of 0.47. These are all considered extremely low salt contents
and therefore should prove sufficient in supporting all native re- vegetation efforts.
Otter Creek Pit December 12 I -1