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Pitch Reclamation Project Colorado Mined Land Reclamation Board — 2016 Annual Reclamation Report <br /> 2. LAND DISTURBED IN 2016 <br /> Primary surface disturbances in 2016 were associated with effectively conveying snow melt and storm <br /> water across the mine site to minimize erosion and siltation on areas previously disturbed during historical <br /> mining. Specific work included: <br /> • Monitored the erosion and drainage repairs done over the past five years on the first three <br /> benches of the Tie Camp Rock Dump to remove accumulated silt,to facilitate snow melt and <br /> storm water runoff from each bench to adjacent areas and to reduce erosion. <br /> • Monitored the effectiveness of grading and placement of boulders and riprap in the groin areas <br /> west of the Indian Rock Dump to control and dissipate runoff. <br /> • Cleaned of sediment traps on the Indian and Tie Camp drainages to prevent heavier sediment <br /> from entering the Sediment Control Pond. <br /> • Monitored the effectiveness of grading in the east wall of the North Pit to facilitate movement of <br /> water from the 10,800 bench to the 10,600 bench. <br /> Additional surface disturbances in 2016 were associated with completion of four new piezometers at the <br /> toe of the Indian Rock Dump as approved by technical revision No. 7 to the reclamation permit (TR-7), <br /> dated May 9, 2016. TR-7 and supporting application materials are provided on the CD attached to this <br /> report. The piezometers were used for field pilot testing of injected phosphate reagents as a source <br /> control/treatment approach that may be implemented to establish a reasonable and defensible lowest <br /> practical level (LPL) for uranium as measured at the CDPS permit compliance point Outfall 001A (also <br /> known as SW-33)and described in Section 4. <br /> 2 <br />