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Alternatives <br />Table 2-2 <br />Design Criteria <br />Topic Design Criteria for the Proposed Action <br />Water use Drilling water will be reused as available. <br />Operations & <br />Maintenance Activities <br />Emergency Shaft Hoist and generator will be tested weekly per MSHA requirements to assure <br /> functionality. <br /> A 1,000 gallon propane tank for generator will be buried in pad. <br /> The generator for shaft will be muffled to reduce noise during the testing periods. <br />Site Security A 6-foot high, locked, chain-link fence topped with barbed wire will surround shafr <br /> escapeway to preclude wildlife and public. <br /> Solar powered lighting of shaft and emergency escapeway will be used to avoid <br /> installation of a powerline. <br />De-gas installation Degassing trailer will be enclosed with a fence with a locking gate to preclude public, <br /> livestock, and wildlife entry. <br /> Equipment will be inspected by MSHA prior to installation. <br />Monitoring of MDWs Twice daily initial inspections of active de-gas installation then decreasing to weekly. <br />RECLAMATION ACTIVITIES <br />Closure Shaft and emergency escapeway would be capped with concrete and steel structure <br /> below ground surface and backfill material would be used to cover the caps. Caps <br /> would consist of 6 inch layer of concrete poured onto a steel screen supported by a <br /> steel beam frame installed 10 feet below the ground surface. Concrete collars would <br /> be removed and the area re-graded to approximate original contour and re-vegetated. <br />Revegetation Subsurface ripping would be used to reduce compaction prior to replacement of the <br /> topsoil and seeding. <br /> Successful revegetation (measured by 75% cover of adjacent undisturbed ground after <br /> 2 growing seasons in upland areas and 80% ground cover in riparian areas) of <br /> disturbed ground with native vegetation. <br /> Surface will be left roughened ("pocking") as part of the seed bed preparation. <br /> Revegetation of al] reclaimed areas would include reapplication of seed (and a Forest <br /> Service recommended fertilizer if necessary) and periodic watering by the operator if <br /> revegetation is unsuccessful within two growing seasons afer construction is <br /> completed. <br /> Varying seed mixes may be used for revegetation, one that is designed for wildlife, <br /> and one that is designed for livestock to support the post-mining land uses. <br />Reclamation Plan A Reclamation Plan (reviewed by the Forest Service), submitted as part of a DRMS <br /> mine permit revision, prior to any construction activities, will include, but not limited <br /> to, methods, seeding species and seeding rates. <br />COMPLIANCE REQUIREMENTS <br />SMA Requirements Operator shall comply with applicable requirements of surface management agency <br /> (30 CFR 815.15) or approved State program. <br />Plugging Bottom 50-feet of the continuously cored hole would be plugged with cementations <br />Requirements grout to prevent water from entering the mine following Deer Creek Shaft <br /> Construction. <br />' Deer Creek Ventilation Shaft and E Seam Methane Drainage Wells DEIS 29 <br />