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Ingleside Ouarrv <br />Mining Plan <br />The total area to be affected during the life of this mine is 66 acres. The existing MLRB permit allows <br />six acres of major disturbance, eight acres of moderate disturbance and- seven acres of minor <br />disturbance at any one time. Therefore, the total disturbed area is limited to 21 acres. There is <br />currently less than 10 acres of disturbed area at the site. <br />The material available to be mined onsite includes (from the surface downward) red sandstone, a gray <br />limestone, and another red sandstone underlain by another gray limestone. These units, which are part <br />of the Ingleside formation, all dip approximately 20 degrees to the east. The strike of the beds is <br />approximately N 10° to N 15° W. At this time, the mining operations are focused on removing the <br />uppermost red sandstone in order to mine the uppermost gray limestone. <br />The mining operations will generally proceed from north to south. However, removal of the material <br />proceeds from east to west, up the dip slope at each location. It is anticipated that the length of the <br />high wall will be between 800 and 1200 feet. There is approximately 300 feet between the existing <br />mining operation and the top of the ridge to the west. Mining will be limited to no closer than 50 feet <br />from the ridge in order to preserve the integrity of the ridge and the view of the residents to the west of <br />the ridge. Initially, the red sandstone layer is removed to expose the underlying gray limestone. The <br />gray limestone will then be removed in benches approximately 20 feet wide with approximately a 25- <br />foot high wall. <br />The mining is accomplished by blasting and bulldozing. Blasting typically occurs two to four times a <br />year. The blasting activities are monitored for adverse effects. Blasting has been conducted at the site <br />for 15 years with no adverse effects or complaints from neighbors. After the material is broken by the <br />blasting it is loaded into a crusher and reduced to specified sizes. The material is then temporarily <br />stockpiled onsite until it is loaded into haul trucks with afront-end loader. <br />Due to the rocky nature of the site, stormwater runoff has not caused any erosion problems to date. <br />Much of the precipitation onsite infiltrates into the fractured rock. Surface water runoff is also buffered <br />by the stockpiles of material onsite. In addition, drainage ditches along the side of the access road <br />direct the runoff to prevent any washouts along the roadway. A stormwater detention basin also exists <br />just downstream of the mining operations. The Colorado Department of Public health and <br />Environment has reviewed the conditions at the site and determined that a stormwater permit is not <br />required. <br />Reclamation Plan <br />Reclamation of the site will be in accordance with the existing MLRB permit. This will be <br />accomplished by regrading the fine-grained residual material from the crushing and screening <br />operations. As the stockpiles are moved further south along with the mining operations, the fine- <br />grained residual material will be regraded with the bulldozer and front-end loader to uniformly cover <br />the bench areas created by the mining. There is no topsoil available onsite. Topsoil may be imported <br />1 <br />