Laserfiche WebLink
the presently unincorporated portions of the proposed expansion area following <br />completion of annexation of Ready Mixed Pit No. 1. <br />Ready Mixed is proposing to create seven additional phases of mining to the <br />permit consisting of approximately seven to 18 acre mining areas as shown on Figure D1. <br />Mining is currently occurring at Erger's Pond Pit with material transferred from that pit <br />to the Bromley Lakes Pit plant via conveyor the sits on the land bridge between the <br />Bromley Lakes plant and the Erger's Pond Pit site. Following completion of mining of <br />Erger's Pond Pit (estimated to be during 2010), the land bridge will be wet-mined (as <br />already currently planned and permitted) from north to south towards the plant and <br />conveyor disassembled and removed as the mining progresses. When the northern three- <br />quarters of the land bridge are mined out the earth berm between the two halves of Ken <br />Mitchell lakes will be gone, creating one large reservoir. Removal of the southern <br />quarter of the land bridge will complete the mining in the eastern part of the north half of <br />Bromley Lakes Pit Cell No. 2. A "jump" will be made to leave the part of the land bridge <br />containing the existing Ken Mitchell Lakes slurry wall and City of Aurora Prairie Waters <br />Pipeline, which already traverse the land bridge a the south end of the existing reservoir <br />through which the land bridge exists. 50 ft geotechnical setbacks will be made from <br />these structures. In total, the land bridge as defined herein comprises 12.4 acres and is <br />referred to as Phase 11. <br />Prior to mining in within the western portion of the proposed 77.0 acre expansion <br />area, the McCann Ditch will be relocated as shown on Figure D1, Exhibit D - Mining <br />Plan. The design approach is to relocate the ditch to follow the contour of the eastern <br />limit of the South Platte River 100-year floodplain, thereby expanding potential water <br />storage acreage within the floodplain. A slurry wall will be installed west (downgradient <br />of) the ditch after its relocation. Mined areas east of the relocated ditch and above the <br />floodplain will be reclaimed as cropland using overburden from the various Ready Mixed <br />mining operations in the area to backfill to approximate existing topography. <br />Mining of the proposed 77.0 acre expansion area will begin by mining a 250 ft <br />wide strip along Brighton Road. This will be done inside a 50 ft geotechnical setback <br />along the road to preclude potential settlement impacts to the road right-of-way and <br />parallel subsurface utilities. This will be Phase 12 and will comprise 10.5 acres. <br />21