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The active mining area will be limited to 15 acres at any one time. <br />Reclamation will occur concurrently with mining. As mining progresses into a new 15 <br />acre area, the mined out 15 acres will be sloped and contoured in preparation for <br />final reclamation. This rotational progression of mining and reclaiming will continue <br />across the mesa and will be consistent throughout the life of the mine. <br />Earthmoving equipment will vary with mine development. Depending on <br />depth of plant growth material and overburden, bulldozers and/or scrapers will be <br />used to expose the target reserve. Loaders will extract the gravel reserve and feed <br />the processing plant. Bulldozers will maintain slopes and manage stockpiles when <br />necessary. Reclamation will utilize bulldozers and graders to contour slopes and <br />prepare surfaces for seeding. <br />The aggregate processing plant will move as mining progresses through the <br />phases. The plant will be located out of sight of adjacent neighbors on the east face <br />of a mesa in Phases I and II. To minimize the potential for fugitive dust, the plant <br />will be placed near the toe of a mesa out of the path of prevailing westerly winds. <br />The processing plant will include portable crushers, screens and conveyors and will <br />operate within the disturbed area. The control van will serve as operation center for <br />employees. All interior haul roads will be temporary, reclaimed when they are no <br />longer needed by the operation. <br />Mining products and byproducts stockpiles will be located within the bonded <br />area of disturbance. A maximum of six (6) inches of plant growth medium will be <br />salvaged and stockpiled for use during reclamation. Plant growth medium stockpiles <br />will be posted as reclamation topsoil and not for sale. Waste rock, fines and <br />overburden will be stockpiled and used to rebuild the slopes concurrently with <br />mining. In the event perimeter stormwater berms are necessary, they will be <br />constructed of overburden and/or fines as mining and reclamation progresses. <br />Setbacks are required from two manmade structures. Colorado Interstate <br />Gas requests a 50 foot setback from the centerline of the high pressure gas line. <br />Xcel Energy requests a 100 foot longitudinal setback along the easements from each <br />structure and a perpendicular setback from the structure to the edge of the <br />easement. <br />Groundwater is not expected to be exposed at this excavation elevation; <br />therefore no impact to the hydrologic balance is anticipated. No acid or toxic <br />producing materials will be exposed during mining. No explosives will be used in <br />conjunction with mining or reclamation. <br />5 <br />