2016-11-04_PERMIT FILE - M2016009 (7)

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i Mining product and byproduct stockpiles will be located within the bonded area of disturbance. A minimum of six (6) inches of plant growth medium will be salvaged and stockpiled for use during reclamation from all disturbances including but not limited to working face, processing and stockpile areas, haul roads both interior and external and other mine related disturbances. Plant growth medium stockpiles will be posted as reclamation topsoil and not for sale. Waste rock, fines and overburden will be stockpiled and used to rebuild the slopes concurrently with mining. Topsoil stockpile erosion caused by wind will be minimized by strategically locating the stockpiles on the east side of the mesas whenever possible, blocking effects of the prevailing westerly winds. Topsoil that is not replaced on backfilled slopes in a time short enough to avoid deterioration, within one year, will be seeded with the seed mix presented in Exhibit E, per the recommendation of Mr. Richard Rhoades on April 29, 2016. Topsoil stockpiles will be seeded during late fall if the anticipated life is more than one year. Because Badger Hills is a semi-arid environment, stormwater best management practices (BMPs) will filter and release storm water that falls on to or flows across the affected area. Berms and swales will be constructed that direct storm water to detention basins or filtration outlets. Detention basins will be constructed in areas where storm water will infiltrate within 72 hours. Straw bale or straw wattle filtration outlets will be constructed along and in swales and berms filtering sediment, releasing storm water onto undisturbed areas at historic flow rates wherever possible. Stormwater BMPs (berms, swales and detention basins) will be constructed with on-site material including aggregate, overburden and/or mining fines. BMPs will be constructed consistent with standards of highway construction projects including compacting berms and armoring upgradient faces. As a sister company to A&S Construction Co., Fremont employees implement effective BMPs on public roadway projects and are committed to the same standards at mining sites. Setbacks are required from two manmade structures. Colorado Interstate Gas requests a 50 foot setback from the centerline of the high pressure gas line. Xcel Energy requests a 100 foot longitudinal setback along the easements from each structure and a perpendicular setback from the structure to the edge of the easement. Groundwater is not expected to be exposed at this excavation elevation; therefore no impact to the hydrologic balance is anticipated. No acid or toxic producing materials will be exposed during mining. No explosives will be used in conjunction with mining or reclamation. As requested by Colorado History, should human remains be discovered during the proposed project activities, the requirements under State law C.R.S.24-80 (part 13) will be followed. Activity in the vicinity of the discovery location will cease and the appropriate oversight agencies will be contacted. 7 Revised October 18, 2016