Laserfiche WebLink
C~ <br /> <br />Stage 4: Stage 4 is the final reclamation phase wherein <br />mining is completed and soils (overburden and <br />topsoil) are removed from the respective <br />stockpiles, replaced and spread on the Stage 3 <br />area which is the final remainira disturbed <br />area. Seeding will be executed per the <br />approved reclamation plan. <br />Drainage Control: <br />Drainage will be controller by the <br />installation of a temporary ditch thrcugh the pit <br />area from the Stage 1 area through the Stage 3 area <br />flowing easterly until the drainage ditca daylights <br />and adjoins the existing borrow ditch of Colorado <br />Highway 14 at NE boundary of the Stage 3 area. <br />If a steep section where the ditca adjoins the <br />Highway 14 borrow ditch is created that exceeds a <br />38 flow gradient, a drop structure of appropriate <br />riprap (local rock) will be installed. <br />Pit Depth: <br />The designed pit depth is determined to be <br />approximately 15 to 20 vertical feet. The final <br />pit bottom elevation is to be controlled by the <br />above described drainage ditch that <br />daylights/drains to the east of the prcposed mining <br />area. In this manner, sufficient drainage is <br />available via gravity flow from the proposed mine. <br />Pit/Pile Slope Angle: <br />Pit wails or stockpiles shall -:ct exceed a <br />slope angle of 3H:lV. <br />Access Road (haul road): <br />A haul road shall be constructed accessing the <br />northern boundary of the proposed mi^e area from <br />Colorado Highway 14. At the proposed intersection <br />of the haul road and the Highway 14 borrow ditch, a <br />drainage culvert pipe (CMP), not less than 24 <br />inches in diameter, will be installed. <br />The haul road will be removed and reclaimed <br />after mining operations are comple*_e unless the <br />landowner (Colorado State La..^.d Board) <br />requests/approves, it remains for peraaaent access. <br />