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E-2 <br />The reclamation plan is amended as follows: <br />Removal of Embankment <br />The embankment between Road Runner's Rest II Pit and the pit immediately south of Road <br />Runner's Rest II Pit known as the Hazeltine Pit (Mining Permit M-1977-153) will be <br />removed which results in a continuous storage reservoir. This removal is required because of <br />anew CLOMR filed by Adams County and approved by FEMA. These two mining pits aze <br />in the South Platter River Flood Plain and the embankment between these two pits needs to <br />be removed to allow for a change in the flood stage caused by the installation of 120`n <br />Avenue on the north side of Road Runner's Rest II Pit. <br />Developed Surface Water Storage Reservoir <br />Road Runner's Rest II will eventually be converted to a surface water storage reservoir <br />(WR). Pursuant to the agreement between the owners of the property, Denver Water, South <br />Adams County Water and Sanitation District and Suburban Sand and Gravel, the miner will <br />continue to mine commercially viable materials for approximately 3 and'/z more years. As <br />the mining activities are completed, Denver Water will begin efforts to convert the facility to <br />a storage reservoir. <br />As part of development of a surface water storage reservoir and to prepare the site to comply <br />with current state regulations, Denver Water has installed a slurry wall around the perimeter <br />of the Road Runner's Rest II pit and other adjacent properties. The description of the <br />properties affected by the slurry wall is set forth in the amendment for permit M-1977-153. <br />Plans and specifications for this slurry wall are included as part of this amendment. <br />Essentially the slurry wall construction consists of preparing a working bench, excavating a <br />deep 3' wide trench into bedrock, filling the trench with a slurry mixture of bentonite clay <br />and water, mixing the excavated material with more bentonite clay and native materials and <br />backfilling the trench with this mixture. After the slurry wall is complete the bench area is <br />restored and reseeded. After the slurry wall is properly cured, the ground surface is restored <br />to its original condition resulting in no visible structures above ground. <br />The slurry wall will provide an impermeable barrier that will prevent the ground water from <br />entering the water storage reservoir. <br />Hydrologic Balance <br />The ground water hydrology and hydrologic balance is discussed in detail in Exhibit G - <br />Water. <br />Water Conveyance Structures <br />As part of the development of a surface water storage facility, water conveyance structures <br />will be added to the facility. Inlet structures to covey water from future storage facilities to <br />