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8. Topsoil and Overburden Handling <br /> Topsoil on the site is approximately 6-12 inches thick and overburden ranges from 2' to 4' thick. <br /> The initial topsoil and overburden from the South Pond excavation have been stockpiled around <br /> the pond and will be used in the final reclamation. No new excavation of topsoil and overburden <br /> will occur. There is sufficient topsoil and overburden to perform the reclamation of the pond <br /> perimeter. <br /> Other details of overburden and topsoil re-distribution are discussed in Exhibit D: Reclamation <br /> Plan. <br /> 9. Selenium Mitigation <br /> If shale is encountered as a result of excavation, the area will be backfilled with a 2` lift of <br /> overburden and no more excavation will occur in that area. <br /> 10. Mining near the Uncompahgre River <br /> The Uncompahgre River flows through the property and on the east side of the permit boundary. <br /> The banks are protected by riprap that has been established for over 20 years, which has <br /> prevented eroding of the banks. The entire site is within the 100 year flood plain. The current <br /> ponds decrease the chance of flooding to the surrounding property owners because the excavated <br /> pits will allow the 100 year event to fill the ponds to ground level. This volume is small but <br /> nevertheless, it may reduce peak flows slightly during crucial 100 year floods. <br /> Olathe Pit, 2018 <br />