Laserfiche WebLink
RULE 2 - PERMITS <br />• Surface placement of coal (stockpiling) and mine development waste <br />• • Operation of drainage and sediment control structures <br />• Discharge of mine water to surface drainages <br />• Discharge of mine - affected groundwater to alluvial aquifers <br />• Elimination of springs <br />Operational measures that will be implemented to mitigate these impacts are discussed below. <br />In order to conserve available soil resources, vegetation and soil materials will be removed from all <br />new mine disturbance areas prior to disturbance. While beneficial in terms of soil conservation and <br />provision of a suitable growth medium to support final reclamation and revegetation efforts, this <br />practice exposes underlying materials to potential erosion and loss, can increase suspended <br />sediment levels in the runoff water, and may increase sediment contributions to area drainages. To <br />maintain effective surface drainage, mitigate erosion, prevent loss of surficial materials, and <br />minimize additional contributions of suspended solids to area drainages, PSCM will route <br />undisturbed drainage around disturbance areas, grade and stabilize disturbed areas to provide for <br />effective drainage control, establish a drainage and sediment control network to collect and retain <br />runoff from disturbed areas, reclaim disturbance areas as soon as operationally practical, and utilize <br />other specific localized drainage and erosion control methods as necessary. These activities are <br />discussed further in the following sections. <br />In conjunction with mine development, facility installation, and ongoing coal refuse placement, <br />PSCM will grade, stabilize, and maintain all disturbed areas to provide for effective drainage and <br />• minimize potential erosion. Where appropriate, PSCM will utilize localized grading and <br />stabilization measures to effectively control and route drainage and minimize flow velocities. <br />Examples would include graveled surfaces and the yard area drainage system in the mine facilities <br />area; diversion/collection ditches; and drainage control berms utilized to isolate disturbed area <br />drainage. <br />Localized drainage control and grading measures will be supplemented by PSCM's drainage and <br />sediment control network. This network consists of diversion ditches which route undisturbed <br />runoff around or through disturbance areas, collection ditches which intercept disturbed area runoff <br />and route it to sedimentation ponds, the sedimentation ponds, and associated discharge structures. <br />The drainage and sediment control system is described in Section 2.05.3, Ponds, Impoundments, <br />and Diversions, and design information and calculations are provided by Map 2.05.3 -M4, Drainage <br />and Sediment Control Plan, 2.05.3 -M5, Operational Channel Profiles, and by Exhibit 2.05.3 -E2, <br />Drainage and Sediment Control Plan. The drainage and sedimentation control network will collect <br />and retain disturbed area runoff and excess mine water, allowing settlement of suspended solids and <br />any necessary treatment prior to release to natural drainages. Sedimentation ponds will be operated <br />under applicable provisions of PSCM's CDPS discharge permits. SCCC has initiated the process of <br />securing a Colorado Discharge Permit System (CDPS) permit that will include a stormwater <br />management component. SCCC will insert a copy of the CDPS permit for the PSCM as Exhibit <br />2.05.3 -E3, CDPS Permit, upon receipt. Compliance with the terms of the permit will assure that <br />downstream water quality impacts are minimized. <br />• SCCC submitted a Nationwide Permit 21 (NWP21) Preconstruction Notification (PCN) to the <br />Corps of Engineers for PSCM on December 2, 2009. SCCC's wetland delineation was verified by <br />the Corps of Engineers in a jurisdictional determination (JD) on October 27, 2009. A copy of the <br />PSCM Permit App. 2.05 -96 Revision 12/17/09 <br />