2002-11-05_REVISION - M1983176 - Laserfiche WebLink

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ASPHAL7 SPECIALTIES CO. Exhibit G -Water Information This section describes the existing water features in and nearby the proposed amendment area and potential impacts on water resources due to mining. Local surface water features in the vicinity of the project aze shown on both the Index Map and the Mine Plan Map. A Gravel Well Pennit and Temporary Substitute Supply Plan have been approved by the Colorado State Engineer and aze in force for the current permit. These items will be amended to include the additional mining area. Increased water requirements based on the expansion of the amendment area, in the form of increased "make-up" water by greater exposure of ground water and water lost through product, are discussed in Exhibit D, the Mining Plan. All of the area to be amended onto the Speer Mining Resource Conditional Use is located within the 100-year floodplain of the South Platte River and a currently approved and in force Adams County Floodplain Permit will be amended to take into account the additional azea. UD&FCD requirements for the amendment area will be incorporated into the revised Floodplain Permit. Mining will continue to be by the "dry mining" method as is currently being practiced, pumping alluvial groundwater from within the azeas to be mined. Mining will expose approximately 6.0 surface acres the first year and 5.5 surface acres the second year in the amendment area. Surface Water The nearest major watercourse is the South Platte River, which flows along the western edge of the amendment area. Final dischazge from dewatering trenches of the amendment area will be to the South Platte River. Prior to any discharge activity from the amended area to the South Platte River, ASCI will amend the current CPDS Permit. Groundwater Wells neazby to the amendment area are a mix of both alluvial and bedrock wells. The location of these wells is shown on Exhibit C-3, the Adjoining Property Owners Map. None of these wells are the primary source of domestic drinking water, as South Adams Water and Sanitation District supplies taps to this area. ASCI has notified all adjacent neighbors to the amendment azea of our proposed addition of the property into our mining plan as part of our company "communications program" and so they are aware that if significant drawdown occurs to their alluvial well, that they are to contact ASCI. We are awaze of possibly only one active alluvial well neaz to the amendment azea. ASCI has installed two groundwater observation wells on the amendment area, at the locations shown on Exhibit C-1, the Pre-Mine Plan Map, to compliment the three monitoring wells currently in use on the existing permit azea. ASCI has been monitoring the two wells installed on the amendment area on a monthly basis since January 2002 to obtain baseline data. ASCI will continue to monitor all active monitoring wells, both on Speer Mining Resource 19 October 7,2002 Asphalt Specialties Company, Inc. DMG Permit Amendment No. 2