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(c) Specify the thickness of overburden or quantity of waste rock, if any, <br />to be removed to reach the deposit. The location of any overburden <br />stockpiles or waste rock fill must be shown on Exhibit E — Map: <br />This mining operation is a borrow pit. Once the adequate topsoil is removed, all excavated <br />material will be used as borrow material. <br />(d) Specify the thickness of the deposit to be mined: <br />Maximum removal depth will be approximately 25 feet. Removal depth will not create <br />depressed areas. Removal will result in a final grade to facilitate storm water runoff from the site <br />and not impound water. <br />(e) Describe the major components of the mining operation such as: <br />roads, access routes, pit, office, shop /maintenance buildings, plant, <br />processing facilities, and any underground openings such as adits or <br />ventilation facilities. These components must be located on Exhibit E <br />— Map: <br />All major components are shown on Exhibit E —Mine Plan Map. The operation will consist of an <br />access road allowing borrow material to be loaded and hauled to the CDOT project construction <br />site. The haul road will be maintained during mining operations to be safe and to function <br />properly. The width of haul road will vary from 18 feet to 20 feet wide. New road construction <br />will include a road profile appropriate for the intended use. Road maintenance will include <br />maintaining proper drainage, runoff controls, and dust control as needed. <br />If required or needed, there will be a grate /screen to remove oversized rock from the borrow <br />material. <br />(f) Specify the dimensions of any significant disturbance to the land <br />surface such as pit excavations, mine benches, impoundments, <br />stockpiles, waste rock disposal areas, etc: <br />Please see Exhibit — E Pre - mine/Mine Plan Map <br />(g) Specify the dimensions of any existing or proposed roads that will be <br />used for the mining operation. Describe any improvements necessary <br />on existing roads and the specifications to be used in the construction <br />of new roads. Describe any associated drainage and runoff <br />conveyance structures to include sufficient information to evaluate <br />structure sizing: <br />Please see Section 6.3.3(1)(e) above. <br />(h) Specify the amount of water that will be used in conjunction with <br />the operation, and the source of the water: <br />The only water needed for the borrow pit operation is what will be needed for road watering dust <br />control. A typical gravel mining operation may be expected to use about 1.3 acre feet of water <br />20 <br />