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controls, and dust control as needed. <br /> • No on-site scale,processing facility, office, shop/maintenance facility,plant, <br /> or any underground openings will be created or needed. <br /> (f) Specify the dimensions of any significant disturbance to the land surface <br /> such as pit excavations, mine benches, impoundments, stockpiles,waste rock <br /> disposal areas, etc: <br /> • 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 /> • An established roadway will be maintained for site access. It will conform <br /> to the Weld County standards. <br /> • The only real internal road will be access to the current excavations and to <br /> the topsoil stockpile. The topsoil access road will be bladed in with the <br /> topsoil pushed to the upper side of the road where it is constructed across a <br /> slope. Otherwise, the topsoil will be bladed to one side. The road will be <br /> soil/dirt/millings road approximately 15 to 20 feet wide, to accommodate <br /> scrapers and other types 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 should not exceed 18 months of <br /> operation. Therefore 0.65 acre-feet of water should be sufficient for dust <br /> control. There will be no other uses of water at the borrow site. <br /> • Water for the project will be purchased locally with the town of Johnstown <br /> that is currently established for the current CDOT project. <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 /> 27 <br />