2021-10-29_PERMIT FILE - M2021064 (6)

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regulations,and water quality laws and regulations, No dredge or fill in waters of Colorado or the United States is proposed,and no temporary or large siltation structures will be placed except as required by permits,' and will be removed in accordance with those permits. If process water is generated, such water will be retained on site and allowed to evaporate or infiltrate. No storm water structures are proposed which are intended to retain storm water for longer than 72 hours. Earth dams(3.1.6.(2)) Mining will be done only in areas which will not present potential for negative impact on the stability of any off-site earth dams. (None identified.) Except for storm water control systems in and around plant areas,there will be no earth or other dams constructed: for the most part, water features(such as storm water detention and retention basins and perimeter swales)will be incised. Those berms and basins will contain less than 1.0 acre-feet of water at any time, including immediately following 24-hour, 25-year storm events, except as approved by the Colorado Division of Water Resources,and are not planned to contain more than 10.0 acre-feet of water. Mining is expected to remain above the normal ground water table. No permanent ponds are planned. Erosion control(3.1.6.(3)) All surfaces will be stabilized and protected to control erosion. Stockpiles of overburden,soil and excess fines will be protected against erosion,traffic, and weed invasion;either by seeding (temporary seed mix or agricultural products)or application of dust-control and crusting agents(such as polymers or other soil treatments),wind or silt fencing. (See below and Exhibit J for seeding data, Exhibit D for additional stockpile information.) Groundwater(3.1.7,) The Applicant shall comply with all applicable statewide and classified standards, based on existing and reasonably potential future uses, and with new standards which may be applicable in the future. (See Exhibit G.) Based on information from other operations in the area with similar conditions,the operation is designed to have no reasonable potential to adversely impact groundwater quality or quantity or cause any further lowering of quality. It is not anticipated that tributary water will be encountered in the mining.The Applicant will comply with any conditions as established by permits. Wildlife safety and protection(3.1.8.(1)) Wildlife issues are addressed at length in Exhibit H.A buffer zone will exist between the pit and major features either on or off site. Since mining will be done in annual steps,there will be no long-term,wide barrier to migration.The buffer zones, areas not yet mined, and reclaimed areas will provide space for wildlife to migrate around the pit operations. Weeds shall be controlled. Steeply-sloped stockpiles/berms will assist in deterring wildlife and livestock from nearing the top of highwalls of greater height than steep slopes naturally occurring in the area,and temporary fencing will be used to reduce potential for livestock and wildlife to graze on areas being reclaimed. Priority, however,will be given to use for livestock rather than wildlife. Wildlife habitat management and creation (3.1.8.(2)) In accordance with the wishes of the landowner,and based on current and planned post-reclamation use as grazing land, no actions specifically to create or improve wildlife habitat in the permit area shall be undertaken. Priority shall be given to agricultural use for livestock,not wildlife. Topsoil(3.1.9.) Approximately 3-36 inches of soil and overburden(based on USDA data and pre-mining activities by the Dutton Ranch)will be removed prior to extraction and stockpiled for protection(See discussion in Exhibit D and above). Any woody vegetation will be removed by grubbing prior to stripping. Slash and smaller woody materials will not be burned but saved for use in reclamation. (Refer to Exhibit I for detailed information on soil.) Except for the plant area and roads,relocation of stockpiled soil will be done on an annual basis as extraction areas are expanded and previously-mined areas are reclaimed. If necessary,as material is available, and as authorized by DRMS, materials may be added to amend and improve soil, including fertilizers,commercial soil amendments, manure from livestock, soil or non-toxic organic materials from on-or off-site(such as sawdust, Primarily CDPS storm water permits. C&J Gravel Products, Inc. Page 23 of 93 20 OCT 2021 Application for Permit: Oakbrush Hill Gravel M-2021- C&J-DPR-V5-001