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Overburden and topsoil existing stockpiles plus amounts to be generated during <br />completion of mining total approximately 770,000 cubic yards. This volume is based <br />upon 2002 survey data, which provides stockpile estimates, and based upon projected <br />un-mined overburden, derived from test hole information on the Peschel and <br />Longmont tracts. The estimated volume of material is more than adequate to reclaim <br />the property to the specified pit wall slopes and to provide drainage chazacteristics as <br />shown on Exhibit Fl. Approximately 492,000 cubic yazds of overburden and topsoil <br />will be needed to complete the revised reclamation plan. Overburden and topsoil <br />materials remnant from mining operations will be used for reclamation purposes. The <br />costs of reclamation activities will be determined by standazd procedures developed by <br />DMG. <br />6.4 Reclamation Schedule <br />Whenever possible, the operator will concurrently reclaim azeas where mining has <br />been completed. Reclamation, including regazding highballs, pond and wetland <br />construction and seeding will be completed in 2 to 5 years following the completion of <br />mining operations in a given area of the site i.e. Peschel, Sherwood, Bigelow, <br />Longmont and Distel. <br />6.5 Water <br />Overburden and mine materials will be inert and impacts to local surface water or <br />groundwater quality aze not anticipated to occur as a result of mining or reclamation <br />activities in the proposed expansion azeas. The applicant's Colorado/NPDES <br />discharge permit will be updated to incorporate the dischazge from the reclamation <br />area. The applicant will comply with all applicable State water quality laws and <br />regulations. <br />The revised reclamation plan will result in a decrease in surface evaporation from the <br />currently approved plan. A water augmentation plan will be developed and submitted <br />to the State Engineer's Office, Colorado Division of Water Resources, to address post- <br />mining consumptive use of water. <br />6.6 Reconstruction of the Drainage Pattern <br />Reclamation of the combined Longmont, Distel, Bigelow, Sherwood and Peschel <br />properties includes the construction of a series of ponds and wetlands along a single <br />flow path. Inflow to the wetlands and ponds will be from indirect groundwater flow as <br />snsnooa <br />