Laserfiche WebLink
Introduction <br />This chapter contains a description of the existing and proposed structures to be used in connection <br />with or to facilitate the surface coal mining and reclamation activities at the Seneca II-W Mine area <br />described in the Coal Resource Recovery, Tab 12. It is important to remember that the Seneca II-W <br />Mine is an existing mine which requires various support facilities (see Exhibits 12-2, 12-3 and 13-11. <br />The existing facilities have been previously approved by CMLRD in issuing permits for mining in the <br />Seneca II-W Mine area. <br />Construction of the original facilities at the Seneca II-W Mine began prior to Peabody's start-up of the <br />mine in 1990. The existing facilities were constructed or modified in 1990 to support the mining <br />operations end comply with the applicable rules and regulations. Facilities in the upper block were <br />constructed by July 1992. Facilities in the II-W South area will be constructed es mining progresses to <br />the south beginning in 1998. The following describes the existing end proposed structures at the <br />Seneca II-W Mine. <br />Sediment and Water Control Facilities Plan <br />SCC utilizes various types of structures to control the runoff from disturbed areas within the permit <br />boundaries at the Seneca II-W Mine. In addition, surface mining activities will be designed and <br />conducted to minimize disturbance in both the mine Dlan and adjacent areas in order to preventlong- <br />term adverse changeain the hydrologic balance. <br />Sediment control measures will include proper utilization of mining and reclamation methods and <br />sediment control practices singly or in combination. Sediment control methods may include, but not be <br />limited to the following: <br />Disturbing the smallest practicable area at any one time during the mining and construction <br />operation; <br />2. Stabilizing graded material to promote a reduction in the rate and volume of runoff; <br />3. Retaining sediment within disturbed arses; <br />4. Diverting runoff away from disturbed areas including stockpiles, backsloDes, and material <br />storage; <br />5. Diverting runoff through disturbed areas using stabilized earth channels, culverts or pipes so <br />es to prevent, to the extent possible, additional contributions of sediment to streamflow or <br />to runoff outside the permit area; <br />6. Using temporary, secondary sediment control measures such as straw dikes, silt fences, <br />small V-ditches, riprap, mulches, check dams, vegetative sediment filters, temporary cover <br />crops, sediment traps, and other measures that will reduce overland flow velocity, reduce <br />runoff volume, or trap sediment. Sediment traps, sumps and dozer basins will not have an <br /> <br />1 Revised 9/98 <br />