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tributary to the Williams Fork River. An integral feature of. the Hen- <br />derson Mill and tailing deposition system is a closed loop industrial <br />water circuit with a flood bypass system capable of handling a 200- ~ <br />year snowflood. At termination of mining, the final tailing crest <br />elevation will be 8,900 feet. Inflow into the tailing pond will be <br />composed of water from Ute Creek, the East Branch of Ute Creek, the <br />West Branch of Ute Creek, and all surface area above and at the level <br />of the tailing pond. <br />The existing 200-year flood bypass facilities wi.11 be <br />abandoned after operations are terminated. The East Branch Reservoir <br />on the East.Branch of Ute Creek and the Ute Creek Reservoir- on Ute <br />Creek will be operational and maintained. Both the East Branch Dam <br />and the Ute Creek Dam are capable of passing a Probable Ma;cimum Flood. <br />Plant facilities located above these reservoirs will not bEa affected <br />by a flood. The tailing storage area is located below the dams. The <br />routing of a flood through this area will require minimal riew con- <br />struction to provide adequate and dependable protection fox' the <br />tailing embankment. <br />When operations are terminated, the tailing pond will have a <br />storage capacity of 21,000 acre-feet for flood waters, including 10 <br />feet of freeboard between the water surface and the dam crest_ This <br />storage capacity and the continued use of the decant facilities, 100 <br />c.f.s. capacity, will control all floods in the tailing area. <br />The final design, outlined above, is based upon flood <br />protection, as required, for each drainage area. The design involves <br />a m~n~mu_m~~p=*~ 1, operatio d maintenance expenditures and <br />provides a system that is~dependable for flood protection. <br />9-8 <br />