GENERAL32961

• Permit No: M1999002
• IBM Index Class Name: General Documents
• Doc Date: 8/18/1998
• Doc Name: COMMERCIAL MINE PLAN SUBMITTED TO BLM SECTION 7
• Media Type: D
• Archive: No

• permeability, high available water holding capacity, and a slight erosion hazard (SCS
1982). Yamac loam soils have a fair to good potential for development and as source
materials for road fill and topsoil and are moderately susceptible to frost (SCS 1982).
Redcreek-Rentsac complex soils are located in the southwest and southeast portions
of the Piceance Site (Figure 7-11). This complex is composed of 60 percent Redcreek
series and 30 percent Rentsac series soils, with the remaining 10 percent comprising
Rockoutcrop, Piceance, and Yamac series soils (SCS 1982). Similar to the Rentsac
series, the Redcreek-Rentsac complex soils have poor potential for development due
to rock and slopes, although this series is not as stony as the Rentsac series. These
soils also have severe limitations for reservoirs or impoundments due to high
seepage potential (SCS 1982).
Barcus channery loamy sands are located near the Piceance Creek valley floor
(Figure 7-11). This series consists of deep, somewhat excessively drained soils with
rapid permeability, low available water holding capacity, and medium erosion
hazard (SCS 1982). The high proportion of sand and rapid permeability cause Barcus
channery loamy sands to have severe limitations for reservoir or impoundment
structures (SCS 1982).
Pipeline Corridor
The SCS described and mapped nine soil series along the proposed pipeline corridor
from the Piceance Site south to the Parachute Site. A brief description of these soil
types is given below.
After the pipeline corridor emerges from the Piceance Site, it enters Hatch Gulch,
which contains Barcus channery loamy sands at the lower end and Glendive fine
sandy loam at the upper end. Both of these soil types are deep, well-drained soils
located along drainageways or on alluvial valley floors (SCS 1982). Permeability of
these soils is moderately rapid to rapid. Runoff is slow, and the hazard of water
erosion is slight to moderate.
As the pipeline corridor exits Hatch Gulch and progresses east toward the
Greasewood Compressor Station, it intersects four different soil types: Rentsac
channery loam, Yamac loam, Piceance fine sandy loam, and the Irigul-Parachute
complex (SCS 1982). Rentsac channery loam and Yamac loam are described above.
Piceance fine sandy loam is moderately deep and well drained, with moderate
permeability. The Irigul-Parachute complex is well drained and has moderate
permeability. The pipeline corridor enters Collins Gulch in T2S, R96W, Section 16,
where it re-enters Glendive fine sandy loam (SCS 1982). The pipeline remains in
this soil type along Collins Gulch until it crosses Piceance Creek.
As the pipeline corridor continues south from Piceance Creek, it crosses a hillside
• with Rentsac channery loam as the dominant soil type. It then enters Stewart Gulch
and re-enters the Glendive fine sandy loam soil type (SCS 1982), where it remains
Amencan Soda. L.L.P. '7_13
Commercial Mine Plan
August 18, 1998