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2007-06-29_PERMIT FILE - C1981022A (2)
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2007-06-29_PERMIT FILE - C1981022A (2)
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Last modified
8/24/2016 3:17:32 PM
Creation date
1/17/2008 2:19:29 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981022A
IBM Index Class Name
Permit File
Doc Date
6/29/2007
Section_Exhibit Name
2.05 Operation and Reclamation Plans
Media Type
D
Archive
Yes
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,Section - 2.03.5 <br />The principle spillway is an 18-inch discharge culvert with riser with the lowermost <br />• discharge orifice set an elevation of 6,127 feet. Because Elk Creek is culverted <br />through the entire Elk Creek support Facilities azea, the Pond D dischazge culvert will <br />tie into the existing 9-foot diameter Elk Creek culvert southeast of the corner of the <br />pond. The emergency spillway, at elevation 6,134 feet, is an open channel emptying <br />to a drop inlet and 12-inch culvert, which also ties into the existing Elk Creek culvert. <br />Design information for Sedimentation Pond D is provided in Exhibit 2.05-E3, <br />Drainage and Sediment Control Plan, and the pond configuration is illustrated by the <br />Sedimentation Pond B Map, (Map 2.05-MSD). <br />E. East Yard Sedimentation Pond -The East Yard Sedimentation Pond is located at <br />the base of the hillslope halfway between the Elk Creek facilities azea and the <br />Sanborn Creek Mine portals and north of the Sanborn Creek Mine haul road and <br />overland conveyor. This pond provides drainage and sediment control for the East <br />Yazd area, including the East Yard storage and coal stockpile areas. The East Yard <br />Pond is a fully incised pond in a natural ground with a bottom elevation of 6,084 <br />feet. Pond interior sideslopes are at 3H:1V. The pond can be dewatered through a <br />4-inch gated trickle tube at elevation 6,085 feet. Design information for the East <br />Yard Sedimentation Pond is provided in Exhibit 2.05-E3, Drainage and Sediment <br />Control Plan, and the pond configuration is illustrated by the East Yazd <br />Sedimentation Pond Map, (Map 2.05-M5E). <br />F. Substation No. 3 Sedimentation Pond -The Substation No. 3 Sedimentation Pond is <br />located on the north side of old Highway 133 approximately two miles east of the <br />Sanborn Creek Mine portals. This pond provides drainage and sediment control for the <br />Substation No. 3 and the C-Gulch ventilation shaft areas. The Substation No. 3 Pond is <br />• an incised pond with a bottom elevation of 6,180 feet. Pond interior sideslopes are at <br />2H:1V. The pond can be dewatered either through a 2-inch gated trickle tube at <br />elevation 6,787 feet or through an open slot emergency spillway at elevation G,182.8 feet. <br />Design information for the Substation No. 3 Sedimentation Pond is provided in Exhibit <br />2.05-E3, Drainage and Sediment Control Plan, and the pond configuration is illustrated <br />by the Substation No. 3 Sedimentation Pond Map, (Map 2.05-MSF). Design calculations <br />and the pond design configuration were reviewed and revised, as appropriate, to address <br />increases in the disturbance area associated with construction of the C-Gulch Ventilation <br />Shaft. <br />G. Upper Hubbard Gulch Sedimentation Pond - The Upper Hubbard Gulch <br />Sedimentation Pond is located adjacent to Hubbard Creek and downslope of the <br />Upper Hubbard Gulch disturbance area providing drainage and sediment control for <br />this partially reclaimed area. The Upper Hubbard Gulch Pond is a partially incised <br />pond with a bottom elevation of 6,348 feet. Pond interior sideslopes are at 3H:]V. <br />The pond can be dewatered [hrough either a 4-inch gated crickle tube at elevation <br />6,349 feet or an open slot spillway at elevation 6,351 feet. Design information for <br />the Upper Hubbard Gulch Sedimentation Pond is provided in Exhibit 2.05-E3, <br />Drainage and Sediment Control Plan, and the pond configuration is illustrated by the <br />Upper Hubbard Gulch Sedimentation Pond Map, (Map 2.05-MSG). <br />H. Sanborn Creek Mine Dewatering Pond -See previous discussion under "Mine Water <br />Storage and Discharge." <br />I. Sedimentation Pond E -Sedimentation Pond E, located at the mouth of the second <br />significant ephemeral drainage west of Elk Creek and adjacent to the Union Pacific <br />railroad right-of-way, provides drainage and sediment control for the II West Coal <br />Refuse FaciGq. his also designed to contain any drainage from the II West Coa] <br />Refuse Facility underdrain system. Pond E is an incised pond with a bottom <br />TR-43 2.05-35 Revised August 2003 <br />
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