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EXHIBIT G-1 - WATER INFORMATION NARRATIVE (CONTINUED) <br /> Ground Water System <br /> A search of the State Engineer's records was made to locate wells within one mile of the site, when <br /> the original permit applications was processed. A map showing well locations is included on <br /> EXHIBIT G-3, WELL LOCATION MAP after this narrative. A tabulation of wells is included as <br /> Table G-1 at the end of this narrative. The wells in the area are used primarily for irrigation and <br /> domestic purposes. <br /> There are domestic wells within one mile of the site. The wells withdraw water from the alluvium <br /> or the Denver Basin aquifers. The area is underlain by shales and sandstones of the Arapahoe aquifer. <br /> mining operations are not expected to affect the underlying bedrock aquifer. Water level declines are <br /> not expected to occur as a result of mining. <br /> Manaeement of Runoff <br /> All of the runoff from stormwater will be channelled to remain within the mining area, and there is <br /> expected to be no affect on offsite property. A Stormwater Discharge Permit was obtained prior to <br /> mining being undertaken prior to beginning of the operation and will be followed. A copy of the <br /> Stormwater Discharge Permit has been included in Appendix 1. <br /> Water Requirements <br /> Ground water will be consumed by evaporation, water in the product, and washing. A substitute <br /> water supply plan has been submitted to the State Engineer to replace depletions resulting from the <br /> mining activity along with a gravel well permit application, a copy of which is accompanying this <br /> section of this Amended#1 Permit Application. This permit will be renewed as required by the State <br /> Engineer's Office. <br /> Evaporation will occur from exposed ground water on the site. Water will be exposed in the base <br /> of the dewatered, active mining, and the wet mined areas. During the first two years of operation, <br /> the only water surface exposed will be residual water in the base of the dewatered pit. Based on 2 <br /> acres of exposed water, the depletion is estimated at 5 acre feet per year. The estimated maximum <br /> permanent water surface of the wet mined area will be 22 acres. The evaporation at the maximum <br /> mining stage, and the maximum after reclamation, will be approximately 55 acre feet per year. <br /> The amount of water retained in the product is estimated at 4%. by weight. Based on production of <br /> 1,000,000 tons per year the amount of water consumed by removing wet product is approximately <br /> 26 acre feet per year. The washing will require approximately 1,000 gallons per minute. Washing <br /> will occur at the Thornton Plant, where the material is transported by conveyor. The Thornton Pit <br /> has a substitute plan in place, and depletions from the washing process will be accounted and replaced <br /> within that plan. <br /> Page 2, EXHBIT G-1 <br />