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Weeds in the re-vegetated azeas will need to be controlled by mowing until grasses ate <br />established, usually the fast four years after planting for native species. Again, the applicant <br />should coordinate weed control with Ron Broda in the Weld County Public Works Depamnent. <br />Surface and Subsurface Water <br />The Platte River Conservation District, along with others in the area, is concerned about the <br />overall loss of water resources, both surface and subsurface, due to mining operations such as <br />being proposed. There are concerns relative to the effect this mining operation may have on <br />underground aquifers in the region. If sealing of the reservoirs is planned, what will be the <br />impacts of any water "shadowing effects" downstream of the reservoir? There aze numerous <br />wetlands downstream of the proposed mining operation on the adjacent South Platte River and <br />on tn'butaries to the river. What vtn71 be the short and long-term impacts to these existing <br />wetlands? The surface area of the proposed reservoirs wi71 be large. What w~71 be the long-term, <br />annual evaporative water loss from the reservoirs? <br />The NRCS and Platte Conservation District welcome the opportunity to review and comment on <br />this proposed mining and reclamation permit application. Should you have questions, the NRCS <br />can be reached at 303-659-7004. <br />Sincerely, <br />~Iw.~n. 7 ~u-~cJh, <br />Jan Fritch <br />District Conservationist <br />~~~ <br />Ken Koebel <br />Conservation Technician <br />