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2008-09-16_PERMIT FILE - C1982056A (4)
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2008-09-16_PERMIT FILE - C1982056A (4)
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Last modified
8/24/2016 3:36:18 PM
Creation date
1/27/2009 10:16:18 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056A
IBM Index Class Name
Permit File
Doc Date
9/16/2008
Doc Name
Pages 2.05-65 to 2.05-122.1
Section_Exhibit Name
2.05 Operation and Reclamation Plans Part 2
Media Type
D
Archive
Yes
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Surface Facilities Area <br />The sedimentation control structures associated with the portal area, as shown on Map 24, Surface Facilities, have <br />been constructed in accordance with previously approved permits (CYCC Permit No. 79-177 and TCC Permit No. <br />C-82-056). These structures include Ponds D, E, F, G, and the associated drainage collection ditches and discharge <br />structures. <br />An aerator was installed in Pond D to promote aerobic conditions throughout the year. There is an existing <br />powerline and power-box on the west side of the pond. The aerator and power supply will be removed prior to <br />reclamation of the pond. <br />All of the above referenced sedimentation control structures have been addressed under Rule 2.05.6, with the <br />exception of surface drainage modifications associated with the new coal-handling facilities. Drainage from these <br />facilities will be channeled to Ponds D, E, F, and G as shown on Map 24, Surface Facilities. Diversion ditch and <br />culvert designs are included in Exhibit 8, Sediment Control Plan. <br />In order to provide for better drainage from the west ramp of the portal, the drainage system has been modified. <br />The two culverts that carry water from the west ramp will be plugged, and the water will be diverted toward the <br />Wadge sump. These culverts have been deleted from Map 24, but still exist in the field. Water will course to a <br />small sediment dam which holds a 4-inch overflow pipe. Once the water reaches the top of the sediment dam, the <br />water will enter the 4-inch overflow pipe and then drain to the sump. This system will aid in settling out some <br />sediment from the water before it reaches the Wadge sump. From the sump, the water will be pumped up into <br />Ditch D-2. <br />Two water bodies, the Area 1 Pit Temporary Water Storage Basin and the Washplant I Thickener Overflow Sump, <br />utilized in conjunction with ongoing mine water handling operations, have existed for years and were not <br />previously identified or considered as "impoundments" under the regulatory definition. As a result of changes in <br />regulatory interpretation, however, the CDMG has determined that these existing water bodies fall under the broad <br />definition of "impoundments" and should be identified and regulated as such. Because they are existing water <br />storage facilities and were not specifically designed or constructed as impoundments, the applicable requirements <br />of Rule 4.05.9 are addressed in this context by the following descriptions and the referenced existing configuration <br />drawings: <br />Area 1 Pit Temporary Water Storage Basin -The Area 1 Pit is a remnant surface mine pit adjacent to the Run- <br />of-Mine Coal Stockpile), as shown on Map 24, Surface Facilities, and by Figure EX8v-1 in Exhibit 8V. <br />Impoundment design, operation, maintenance, and reclamation information is provided in Exhibit 8v. The remnant <br />pit area is a totally incised excavation, enclosed by undisturbed natural ground and backfilled surface mine spoils, <br />with an estimated maximum water storage capacity of approximately 200 acre-feet. The pit area is used for <br />temporary storage of excess mine water, as part of the closed-loop mine dewatering and recycle system. Water <br />inputs to the pit are limited to spoil spring discharge from the adjacent reclaimed spoils areas, excess dewatering <br />flows from the -mine dewatering systems, and minor incident precipitation. An upgradient diversion ditch (Ditch D- <br />3) intercepts any surface runoff from upgradient reclaimed surface mine areas and routes it around the Area 1 Pit to <br />Pond D. While a small culvert outlet at the low point on the crest of the pit allows for minor discharge flow to <br />Pond D if the water reaches this level, the temporary storage basin is normally managed to keep water levels well <br />below the discharge pipe. A fixed pumping station is used to control water level, with discharge to a de-sander, <br />located at an old well site, and then to Washplant I or the mine water recycling system, or directly to Pond D for <br />discharge to Foidel Creek. Management of the Area 1 Pit storage basin involves regular inspection and <br />maintenance of water levels and pumping systems, and reduction of water levels prior to spring discharge to <br />provide additional water storage capacity for any minor increases in subsequent spoil spring discharge. <br />With implementation of operations for Washplant II, .the Area 1 Pit is also utilized the primary source for plant <br />make-up water. An additional pump will be placed in the Area 1 Pit and connected to the new 8-inch water-line. <br />Either a float or submersible pump will be utilized, with pump control and access from the existing pump-station access <br />TR08-65 2.05-79 08/20/08 <br />
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