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PERMFILE40184
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PERMFILE40184
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Entry Properties
Last modified
8/24/2016 10:43:12 PM
Creation date
11/20/2007 10:13:15 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981039
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
Pages III-1 through III-62
Section_Exhibit Name
III. OPERATING PLAN
Media Type
D
Archive
No
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1 Haul Roads <br />A haul road has been built to Pit 4 as shown on the Iā¢tining Plan <br />htap. Haul roads were constructed to meet all applicable federal and <br />state regulations on safety. The haul roads were constructed to mini- <br />mize contribution of the runoff water to the suspended solid concentration <br />in Grassy Creek. The design of the haul road to Pit No. 4 is described <br />below. <br />Haul Road to Pit ;lo. 4 <br />The alignment for the road was selected to minimize the haul <br />distance, thereby, reducing the various environmental effects of truck <br />traffic. Because of the elevation difference between the pit and the <br />existing haul road (350 feet) and because of grade constraints, only <br />one road alignment was considered. This alignment is shown in plan on <br />Figure 2 in the maps and exhibits section. <br />Beginning at the northwest edge of Pit No. 4 at elevation 7400 <br />feet, the haul road contours along the valley wall at a 6 percent grade. <br />Before it reaches the un-named tributary creek, the road turns south <br />until it reaches the bottom of the tributary creek valley. The road <br />then turns north until it intersects the existing haul road. <br />The overall grade of the haul road is 5 percent. For safety <br />reasons the two major curves along the road have been designed to have <br />zero grade. The remainder of the haul road has a 6 percent grade. <br />The road alignment traverses a relatively steep slope covered <br />with aspen, sagebrush and mountain brush. A site reconnaissance <br />together with a soils investigation indicates that the north slope <br />below Pit Wo. 4 is covered with an organic topsoil varying in thickness <br />from 0 to about 40 inches. This topsoil is underlain by a colluvium <br />of variable thickness, probably averaging about 5 feet. <br />The colluvial surface materials are underlain by rock which is <br />predominately sandstone. Exploration drilling in Pit No. 4 indicates <br />that the sandstone in the area of the haul road should be massive, <br />hard and fine-grained. Outcrops in the area are commonly weathered <br />beneath a hardened surface. At the anticipated depth of construction <br />the sandstone should be unweathered. This sandstone dips about 15 <br />degrees north in the area of the haul road. <br />The haul road cross-section, shown on Figure 3 in maps and <br />exhibits section, was selected after careful consideration of environ- <br />~aental effects, road stability and operating conditions. <br /> <br />2-35 III-6&7 <br />
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