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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
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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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Stoker Coal Handling Modifications (TR08-651 -The stoker coal handling modifications involve extending the <br />existing truck turn-around area to the north approximately 15 feet. Drainage from the truck-turn-around area and <br />• the associated Haulroad B-2 is controlled by a berm on the north side of the road with sediment traps and rock <br />filters located at intervals along the berm. Drainage and sediment from construction activities for extension of the <br />truck turn-around area, and drainage from the outer fill slope of the road will be controlled through placement of <br />silt fence and/or straw or wood-fiber wattles on the edge of the expansion disturbance area. The road outslope will <br />be seeded following completion of the extension, and sediment controls will be maintained until adequate <br />vegetative cover is established to control erosion and sedimentation. <br />Warehouse/Shop Area -This SAE covers approximately 5.88 acres and is located on anorth-facing slope below <br />the shops. Water (approximately 0.15 acre-feet from the 10-year, 24-hour event) drains through established <br />vegetation, gathers along the railroad track embankment and runs along Ditch F-2 toward the culvert under the <br />light-use road adjacent to Pond F. The water collects in a natural depression on the upper end of the culvert before <br />flowing through the culvert. Once through the culvert, drainage flows down the north side of Pond F and the light- <br />use road/railroad embankment. The area is vegetated and serves as a vegetative filter to inhibit and filter flows. A <br />rock check dam, previously established in this area, acts as a final filter and flow control for drainage before it <br />leaves the area. <br />Warehouse/Shop Area -This SAE covers approximately 5.88 acres and is located on anorth-facing slope below <br />the shops. Water (approximately 0.15 acre-feet from the 10-year, 24-hour event) drains through established <br />vegetation, gathers along the railroad track embankment and runs along Ditch F-2 toward the culvert under the <br />light-use road adjacent to Pond F. The water collects in a natural depression on the upper end of the culvert before <br />flowing through the culvert. Once through the culvert, drainage flows down the north side of Pond F and the light- <br />use road/railroad embankment. The area is vegetated and serves as a vegetative filter to inhibit and filter flows. A <br />rock check dam, previously established in this area, acts as a final filter and flow control for drainage before it <br />leaves the area. <br />• Warehouse Area No. 2 -This SAE consists of approximately 1.5 acres located between the Stoker Pad and the <br />Warehouse/Shop SAE's. There is little or no drainage from the flat, graveled area, and any flow from the area would <br />be controlled and treated by either the Stoker Pad silt fence or the warehouse exemption rock check dam. <br />Pond F and Wastewater Treatment Facility -The Pond F/Wastewater Treatment Facility SAE covers approximately <br />5 acres and is located southwest and northwest of Pond F. The SAE area consists of a 0.5 acre paved parking lot and <br />slope which drains down to the west embankment of Pond F, the outslopes and tops of the ponds of the wastewater <br />treatment system, and the building and roads associated with the treatment facility. The building pads and roads are <br />graveled, minimizing the potential for sediment loss and transport from the area. Any drainage from this area will flow <br />along the north side of Pond F and light-use road railroad embankment. The area is well vegetated and arock-check <br />dam will filter any surface runoff prior to discharge. <br />109 Diversion Filter -Drainage and sediment control for the 109 Diversion will be provided by an existing rock filter <br />adjacent to Pond F, the vegetation surrounding the site, and revegetation. The site is approximately 0.06 acres in size <br />and protected immediately upslope by a collection ditch; which limits surface ninon contributions to the site. <br />7-North Escape Shaft -This SAE covers 1.82 acres of disturbance and is located in the SE1/4, Section 20, TSN, <br />R86W, 6th P.M. on Cochetopa Loam (a C soil). SAE demonstrations have characterized four areas; the north outslope; <br />the east and west outslopes; the south side of the topsoil pile and pad, which incorporates drainage from the north side <br />of the topsoil pile; the cutslope, the berm, the pad, and road drainage. Sediment control will be achieved by seeding and <br />mulching the pad outslopes, the cutslopes, and the topsoil pile, and by placing straw bale dikes or a silt fence below <br />each of these locations to prevent off=site migration of sediment prior to vegetative stabilization. Vegetative filters will <br />provide adequate sediment detention to achieve effluent limitations following a 10-year, 24-hour storm event for these <br />• locations. Rock check dams will be installed at the southeast corner of the topsoil pile and below a riprapped Swale <br />descending the northeast comer of the outslope. Peak flows from a 10-year, 24-hour storm are 0.06 cfs, 0.03 cfs, 0.42 <br />cfs, and 1.59 cfs for the north outslope, east or west outslope, north side of the topsoil pile, and pad, respectively. <br />TR08-65 2.05-82 08/20/08 <br />
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