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Table 2-2 Design Criteria Topic Design Criteria for the Proposed Action Maintenance Roads will be maintained with water bars and appropriate sedimentation controls. Water bar placement and design will be approved by the authorized FS Officer. All use and maintenance of existing NFSRs will be authorized by and be consistent with a FS Road Use Permit. A performance bond will be required per the terms of the road use perniit. WATER RESOURCES Ground Water Any aquifers encountered in the shaft will be scaled by a grout curtain wall extending 20 feet above and below aquifer. Each drill or borehole, well, or other exposed underground opening sealed, or otherwise managed to prevent acid or other toxic drainage from entering ground or surface waters and minimize disturbance to the prevailing hydrologic balance. Surface Water Lease stipulations limit occupancy in riparian areas, wetlands and floodplains. Surface use in wetlands, floodplains or riparian areas will be avoided unless specially authorized. Streams will not be paralleled by roads other than that needed for crossings.* Wetland areas would be avoided wherever possible and BMPs would be implemented for all activities to occur adjacent to or within these aquatic features. Water Quality Material from slides or other sources on roads will not be deposited in streams or other locations where it will wash into streams.* Disturbances to the prevailing hydrologic balance of the affected land and of the surrounding area and to the quantity or quality of water in surface and groundwater systems both during and after the mining operation and during reclamation shall be minimized by measures, including, but not limited to: compliance with applicable Colorado water laws and regulations governing injury to existing water rights; compliance with applicable federal and Colorado water quality laws and regulations, including statewide water quality standards and site-specific classifications and standards adopted by the Water Quality Control Commission; compliance with applicable federal and Colorado dredge and fill requirements; and removing temporary or large siltation structures from drainways after disturbed areas are revegetated and stabilized, if required by the Reclamation Plan. Drilling Water Drilling water (< l0 acre-feet per year for shaft and MDW) will be obtained from MCC's non-tributary water in the mine or Minnesota Creek. This quantity of water is within the GMUG's blanket consultation with USFWS for depletion associated with the Upper Colorado River System. Water will be pumped from portable tanks using ahigh-pressure hose or transported to the site with mobile water carriers. Water Influence Zone Within WIZ, an adequate vegetative buffer or filter strip would be maintained to filter (WIZ) runoff from the road before it reaches the creek, wherever possible. All disturbed areas within 100 feet of a WIZ would be protected with silt fence or other sediment trapping materials specified by the FS. Drill Holes as Water MCC does not antici ate encounterin an si niflcant a uifers durin drillin . ~L~ 24 Deer Creek Ventilation Shaft and E Seam Methane Drainage Wells DEIS ,