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<br />Coulson Excavating Company, Inc. - Bonser Gravel Pit <br />Eahibit D -Mining Plan <br />Table 2 <br />Year Overburden Removal /Stockpiling Gravel Extraction Pit Lining/Backfilling <br />- 5 Pit 1 Pit 1 <br />5 - 10 Pit 2 Pit 2 Pit 2 <br />10 - IS Pit 3 Pit 3 Pit 3 <br />Water Diversions and Impoundments <br />Water will be stored in a sediment pond located at the southwest comer of the permitted azea. No water <br />diversions will exist within the permitted area. Although an irrigation system does exist at the site, it will <br />not be in use during operation. However, it will be reinstalled after mining is complete. <br />Nature of the Overburden, Gravel Deposit, and Underlying Stratum <br />The overburden consists of fine sand and silt, specifically Table Mountain Loam, Table Mountain Saline, <br />and Nunn Clay-Loam soils with slopes ranging from 0 - 3%. Their thickness does not exceed .833 yazds <br />(2.5 ft.). The gravel deposit is classified as Class A aggregate (Schwochow et al. 1974), and has a <br />thickness of 5 yds. Underlain by the gravel is 1 yd. of weathered Pierre shale, followed by Pierre shale. <br />Intended Use oFExtracted Commodities <br />The sole commodity to be extracted from the mine is gravel, which will be processed and used for asphalt <br />hot mix and raw road base. <br />