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• Please see Exhibit E—Pre-Mine/Mine Plan Map for pit dimensions and <br /> estimated excavation limits and location of the topsoil stockpile. No mine <br /> benches, impoundments or waste rock disposal areas are anticipated. <br /> (g) Specify the dimensions of any existing or proposed roads that will be used <br /> for the mining operation. Describe any improvements necessary on <br /> existing roads and the specifications to be used in the construction of new <br /> roads. Describe any associated drainage and runoff conveyance structures to <br /> include sufficient information to evaluate structure sizing: <br /> • As to pit access, please see Section 6.3.3(1)(e) above. <br /> • No runoff or conveyance structures are planned. <br /> • A short driveway will be constructed for site access. It will conform to the <br /> Weld County standards. <br /> • The only real internal road will be access to the topsoil stockpile. The <br /> topsoil access road will be bladed in with the topsoil pushed to the upper <br /> side of the road where it is constructed across a slope. Otherwise, the <br /> topsoil will be bladed to one side. The road will be soil/dirt road <br /> approximately 20 to 25 feet wide, to accommodate scrapers and other types <br /> of earthmoving equipment. <br /> (h) Specify the amount of water will be used in conjunction with the <br /> operation, and the source of the water: <br /> • The only water needed for the borrow pit operation is what will be needed <br /> for road watering for fugitive dust control. A typical gravel mining <br /> operation may be expected to use about 1.3 acre-feet of water per year for <br /> dust control. The borrow operation will not exceed 16 months of operation. <br /> Therefore 0.65 acre-feet of water should be sufficient for dust control. <br /> There will be no other uses of water at the borrow site. <br /> • Water for the project will be purchased locally. <br /> (i) If Ground water will be encountered and/or surface water intercepted or <br /> disturbed, describe how mining will affect the quantity and quality of the <br /> surface or ground water and the methods to be used to minimize disturbance <br /> to the surface and ground water systems including proposed dewatering, <br /> sediment-containment or chemical treatment systems, storm water run-off <br /> controls, and ground water points of compliance: <br /> Neither ground nor surface water will be intercepted or disturbed by the proposed <br /> borrow pit mining and reclamation activities. If necessary, a Stormwater <br /> Management Permit will be secured from the Colorado Department of Public <br /> Health and Environment, Water Quality Control Division (WQCD). In any event, <br /> SEMA will implement its Corporate Stormwater Management Plan which will <br /> include site appropriate Best Management Practices (BMP). A Stormwater <br /> Management Plan will be in place prior to site disturbance to ensure storm water is <br /> 25 <br />