2017-10-21_PERMIT FILE - M1983090

Home Browse Search

Page 2 Mr. Eric Scott September 29, 2017 (g)Show the owner's name, type of structures, and location of all permanent or man-made structures contained on the area of affected land and within two hundred(200)feet of the affected land. -All structures are shown on the maps to the best of the permitees knowledge. (h)In conjunction with Exhibit l-Soils information, Subsection 6.4.9, soils information may be presented on map in this section. Soils map legend is shown on 'Map 3"but soils data seems to be given on 'Map 2a"- please revise for consistency. -Map 2a has been updated and contains no soils data. EXHIBIT E-Reclamation Plan(Rule 6.4.5) (2)(e)A plan or schedule indicating how and when reclamation will be implemented.. The permittee will need to specify at this time if the proposed reclamation for the "wildlife pond"and the pond immediately east of the wildlife pond as depicted on the provided maps will be reclaimed as a lined reservoir, unlined reservoir, or backfilled to original grade, This also applied to the exposed groundwater ponds located within the permit located south of the Cache La Poudre River. -Discussions have been ongoing concerning the Wildlife Pond between the Miner,The Town of Windsor and Central Colorado Water Conservancy District. The current plan is to reclaim 75%of the pond as potential wetlands and 25%to be uplands. There has also been significant discussions concerning slurry lining the pond and using if for water storage but the plan has been to reclaim 75%of the pond as open water/wetlands. The permitted will also need to provide detailed information to describe how lined reservoir within the floodolain will be constructed to withstand flood events. Installation of armored in/et/outlet structures to provide controlled filling and draining of reservoirs is common method to prevent reservoir failure during flood events. -The La Poudre River flooded in 1999 and as a result damage occurred to the slurry lined ponds and the Sinclair Gas/Oil Line bisecting those two pits. Around 1999/2000 Tuttle Applegate designed a spillway to convey water over and into the most downstream pond (east pond). The spillway design included modeling the 100-year flow of 690 cfs and conservatively analyzed the downstream east pond as half full,therefore resulting in higher erosion forces along the spillway path. The spillway was constructed between the two ponds and located at a low point to convey flows safely between the two ponds. During the 2013 flood the Site received significant flooding but no major damage to the slurry wall embankments occurred. The reclamation cost breakdown required for Exhibit L should reflect the reclamation option chosen for these exposed groundwater areas. - The reclamation cost breakdown includes all ponds as slurry lined ponds. The bond has not changed and includes the entire boundary of 284.4 acres. EXHIBIT F-Reclamation Plan(Rule 6.4.6): The map(s)of the proposed affected land, by all phases of the total scope of the mining, shall indicate the following. (a) The expected physical appearance of the area of the affected land, correlated to the proposed mining and reclamation timetables. The map must show proposed topography of the area with contour lines of sufficient detail to portray the direction and rate of slope of a//reclaimed lands;and-The reclamation plans include the timetable to reclaim the outstanding mined out area. The exhibit also shows the contours and slopes. (b)Portrayal of the proposed final land use for each portion of the affected lands. -The reclamation plan map shows the ultimate reclamation of the mined out areas. EXHIBIT G- Water Information(Rule 6.4.6). (2)if the operation is expected to directly affect surface or groundwater systems,you shall: