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This revision request (TR -44) addresses Rule 4.05.9(13) Permanent Impoundments: <br />a) Suitable water quality for intended use, complying with applicable water quality <br />standards and effluent limitations without degradation of downstream waters; <br />Historically, Pond 5 has proven suitable in meeting applicable water quality standards. Pond 5 is <br />an approved design impoundment being a self dewatering pond and does not contribute to <br />degradation of downstream waters. With approval of the CDWR to designate Pond 5 as a <br />Livestock Water Tank, the pond will have the added ability to release water through the manually <br />operated water gate near the bottom of the pond in the unlikely event that it becomes necessary. <br />The historical water quality analysis of the pond is included with this submittal in Attachment D. <br />Given the design volume capacity and the capability to handle 24 hour, 25 year storm water <br />events, water is retained in the pond and it has not been necessary to discharge since being <br />redesigned as a self dewatering pond in 2002. <br />b) Sufficiently stable water level and compatible pond configuration for intended use: <br />Pond 5 receives snowmelt and rain shower run -off from the former mine facilities area and the <br />above Magpie drainage area and retains water through the majority of the year. The pond is <br />configured with gentle sloped well vegetated shores on three sides of the impoundment allowing <br />for the wildlife's and potential livestock's easy access to the water. <br />C) Adequate safety and access for intended water users (i.e., wildlife and livestock); <br />Pond 5 is configured with gentle sloped shores on three sides of the pond for the <br />wildlife's and potential livestock's easy access to the water and the shores and embankment are <br />well vegetated for stability. The southeast side of the pond has a steep bank but is fenced with a <br />barbed, four wire fence and steel posts along the top of the steep slope. <br />d) Prevent diminution of water quality/quantity for affected water rights holders; <br />Pond 5, designed as an approved sedimentation pond, functions to settle out sediment from water <br />run -off entering the pond thereby benefiting the quality of the water. Being a self dewatering <br />pond, when the approved water level /volume is reached in the pond, the pond discharges through <br />the vertical standpipe (primary discharge) enabling the water to flow on downstream. <br />e) Adequate sized impoundment for intended use; <br />As stated previously, throughout the years of EFCI's mining and reclamation activities, numerous <br />Elk in herds numbering from 12 head to 60 head have utilized Pond 5 as a source of water. Based <br />on the historical usage, the size of the impoundment is adequate for the intended use. <br />f) Impoundment suitable for approved post mining land use; <br />Given that the approved post mining land use is for undeveloped rangeland (cattle grazing) and <br />wildlife habitat, retaining Pond 5 as a permanent impoundment will greatly enhance the approved <br />post- mining land use. <br />