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Pitch Reclamation Project Colorado Mined Land Reclamation Board — 2016 Annual Reclamation Report <br /> sufficient existing cover material to obtain the same background gamma readings as obtained prior to <br /> excavation (as required by the RML and the associated Radiation Work Permit). A total of 0.3 acres were <br /> disturbed because of drilling and drill cuttings placement. The area was reseeded in 2015 following cover <br /> placement. Photograph 6 provides an overview of the area with vegetation becoming established in 2016. <br /> -. <br /> a <br /> 15 by a. <br /> Reclaimed Area\ <br /> ..4 <br /> Photograph 6: Reclaimed Area on the Tie Camp Rock Dump with Vegetation becoming Established <br /> in 2016 following Drill Cuttings Placement in 2015 <br /> 3.5 Drainage and Erosion Control — North Pit and South Mine Area <br /> 3.5.1 North Pit <br /> Snowmelt, summer precipitation, and springs in the east wall of the North Pit have been recurring issues <br /> since the pit was developed almost four decades ago. On the east wall of the North Pit, minor erosion in <br /> the form of rill development occurred between the 10,800 and 10,600 benches due to snow melt runoff. <br /> This area, at the crest of the east wall of the North Pit, is a topographic low that concentrates surface <br /> drainage from a relatively large area above the crest of the east wall. In 2010, maintenance was performed <br /> due to displacement in the 10,600 bench, coupled with snow pack and precipitation,which caused ponding. <br /> A single pond was graded and filled to reestablish appropriate drainage along the bench. The repair work <br /> has been closely monitored and the repairs have been effective in keeping water from ponding on the <br /> 10,800 and 10,600 benches. In 2012, a diversion ditch was constructed to channel water from the 10,800 <br /> bench to the 10,600 bench and on to the "Spring" channel. The diversion ditch in 2016 is shown in <br /> photograph 7.This channel was effective until May 2015 when a sluff occurred on the east wall of the North <br /> Pit below the 10,800 level. Photograph 8 from 2016 shows that no additional sluffing has occurred since <br /> 2015. The area was closely monitored following snow melt to assure that water did not pond on the 10,800 <br /> or 10,600 benches. <br /> 7 <br />