Laserfiche WebLink
Mr. Dustin Czapla <br /> Page 5 of 7 <br /> To facilitate larger scale water recirculation and phosphate injection activities, additional <br /> conveyance piping will be installed connecting existing Indian Rock Dump injection wells <br /> to the newly installed wells in the Pinnacle Mine Dump. In addition, fencing will be installed <br /> in select locations. These activities, which are anticipated to result in negligible <br /> disturbance of reclaimed areas, are as follows: <br /> • Installation of fencing around engineered treatment cell (ETC) infrastructure <br /> (Figure 3). <br /> • High-density polyethylene (HDPE) plastic piping associated with water <br /> conveyance and electrical conduits at the Indian Rock Dump phosphate injection <br /> system will be extended to run to wells installed within the Pinnacle Mine Dump. <br /> Installation will be performed in a manner consistent with pipe installation <br /> conducted in 2017 and 2018. Specifically: <br /> o Piping running along access roads and on steep grades will be maintained <br /> aboveground, secured to the ground using stakes and wire harness. <br /> o Piping will be buried at locations where piping crosses existing access <br /> roads. <br /> o Piping running parallel to access roads and/or drainage ditches will either <br /> be secured adjacent to the roads/ditches or placed into the drainage and <br /> away from roadways for safety purposes. <br /> o Piping will be HDPE welded, flanged, or a combination. <br /> Reclamation of LPL Disturbed Areas <br /> Surface disturbances and infrastructure installed as part of this proposed work and <br /> requiring eventual reclamation will include drilling disturbances, recirculation/monitoring <br /> wells that will require eventual plugging and abandonment, and infrastructure associated <br /> with LPL work. Reclamation of disturbed areas will include the following: <br /> • Disturbances associated with drilling will be temporary. These areas will be <br /> restored to pre-drilling conditions immediately following drilling with the exception <br /> of access roads and drill pads that will be used to facilitate well/piezometer <br /> maintenance (Figure 3). <br /> • The proposed wells/piezometers will be used as part of the long-term monitoring <br /> program associated with uranium load reduction system. When warranted, the <br /> wells will be abandoned in accordance with Rule 16 of the Colorado Water Well <br /> Construction Rules. <br /> • Injection platforms and conveyance piping installed in 2017 and 2018 will be <br /> maintained across multiple seasons to support LPL activities. Reclamation of <br /> disturbed areas following the completion of injection activities will include removal <br /> of piping and engineered structures. <br /> • Disturbed ground in each area will be re-contoured and revegetated, with grading <br /> for drainage, scarifying/harrowing, and fertilizing to be conducted as necessary for <br /> proper reclamation. <br /> HOMESTAKE MINING COMPANY ". 1 1 2 MARSHALL STREET, SARGENTS, COLORADO 131 248 <br />