Laserfiche WebLink
mined tonnages can be seen in Table D-1. A breakdown of the estimated areas is included in <br />Table D-2. Both topsoil and overburden may be sold onsite on an as needed basis, however United <br />Companies commits to keeping enough material onsite to be able to reclaim the site. The amounts <br />of topsoil and overburden sold are secondary commodities and are not therefore included in the <br />table below or the annual tonnage sold from the site. <br />Each pit serves as a sediment pond for the operations that take place in it. Pit dewatering will be <br />conducted using a pump located at least two feet below the operating floor, in order to intercept <br />water before it can pick up sediment from the pit. A gravel berm around the pump will also help <br />ensure that the discharge from pit dewatering is clean. Pit 1's pit pump discharges to a small pond <br />just north of the south end of Pit 1. This pond then discharges to the approved NPDES outfall. <br />Pits 2 and 3 will dewater to Pit 1, in order to make use of the first pit's capacity for sediment <br />storage, and the existing discharge point. <br />Clean water from dewatering will be used during mining in order to water trees and other <br />vegetation around the pits that would otherwise be negatively affected by the lowered water table. <br />The wash plant which will be used onsite will consist of a system to handle sediment from the <br />washing operation. This system will consist of two settling ponds. Water will be pumped from the <br />ponds to the plant. As with the mining operations, the operator will ensure that the lowest depth of <br />the settling ponds does not get any closer than T to the Mancos Shale. Removal of settled material <br />will be conducted as necessary and will be dried and used for fill where necessary or placed on the <br />bottom of the pit. <br />Mining will progress through the pits numerically. The topsoil and overburden from a new area <br />will be used to reclaim the previous are. This will reduce material moving as well as reduce the <br />maximum area to be reclaimed. Any fines from the crushing/screening operation and removed <br />from the settling pond will also be salvaged and used in the reclamation. A table of expected <br />mining lives for each Pit is included in Table D-1. The life of each pit is based on the anticipated <br />annual average tonnage. <br />No explosives will be used in conjunction with the mining and reclamation operation. <br />Tri County Pit Sept 2016 D-3 <br />