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<br /> <br />EXHIBIT D -MINING PLAN <br />Mining is expected to begin in Spring 1992. Prior to the actual resource extraction, topsoil will <br />be stripped from the area to be gravel mined and stored near the plant site (Exhibit C). <br />Generally, gravel extraction will proceed in aneast-northeast direction. Gravel will be mined <br />from approximately 32 acres of the 49.78 acre site. Approximately 15 acres of willow-sedge <br />wetland will not be gravel mined. Gravel will be removed to depths of approximately 15 feet <br />with a D-8 bulldozer and 3-4 yard loader. The mined material will be moved to, sorted, and <br />washed at the plant site. Wash water will be taken from the on-site stream, conveyed to the <br />plant site and, after utilization in the processing operation, diverted through a series of three <br />settling ponds before being returned to the stream (Exhibit C). Processed gravel will be stored <br />at the plant site until it is hauled away with end dump tractor-trailers. Approximately <br />70,000 tons will be mined per year with the affected area being reclaimed within eight months <br />after completion of mining so as to coincide with summer and fall months. The period of active <br />mining in estimated to take 10 years. <br />Mining will be conducted on 10.7-acre blocks within the mine permit area. Reclamation will <br />proceed after each years' mining has been completed. Approximately three acres will be mined <br />each year. Thus, reclamation will have occurred for at least two years on part (1/3) of the 10.7- <br />acre block prior to the start of mining on the next 10.7-acre block. This sequence will allow <br />time to evaluate various aspects of the reclamation plan and to make any needed adjustments <br />prior to mining of the next block. <br />~~~.~~ <br />~rz3roz 7 <br />