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<br />Surface water <br />Runoff frog the Ec4:mnn Parl: area and ~ner;v ^'i n- I flc,.s into tho .;Huth Fo-i: <br />of Foidel Creel:, an intermittent stream. kune~i` prom Energy trine _ :lows into <br />Fish Creek, a perennial stream. Salts introduced into [he ground-water system <br />from the mining operation will be diluted and discharged eventually as spr,'_ngs <br />into risk Creek, which flows into the Colorado Ri•:er. The increased salinity <br />of these waters could add to the Colorado River's e>:is[fng salinity problems. <br />tSo acid- or toxic-forming materials are present in the mine area. <br />To prevent increases in erosion, Energ]• Fuels intends to use vegetation to <br />stablize all areas disturbed by construction n.` the emoankments. <br />The upstream face of [he embankment will be covered with rip rap or otherwise <br />s[a6ilized. In addition, [he compam' will use cr~ntour furrowinc, if needed, <br />during revegetation of hill slopes [o reduce nutnff velocities and [o Crap <br />sediment. All runoff from [he Ec4:man Park area will eventuall? 'oe detained in <br />a sediment pond to insure that suspended so'_ids concentrations are within <br />effluent limitations. Permanent diversion ditches will intercept surface flow <br />upslope and dounslope of the two permanent spci;s areas, p m venting upsinpr. <br />runoff from entering [he spoil and detaining downclope runoff coming Erom the <br />spoils. Sediment accumulation will be measured Biannually, and sediment will <br />be removed when it reaches 60 percent of the des;;,ned sediment storage <br />volume. <br />The compan}• will regrnde and revegetate the sediment ponds and [emnorar~ <br />diversion ditches after the disturbed area is r~~~ored. The permanent <br />div_rsion ditches a m designed ac rip rapped chnnne'_s During all p};ases of <br />use; therefore, Cne rompan}' will repair and clear they 's necessa:. <br />Ephemeral stream channels will be re-es[ablisiied to appro::imate <br />premining geometry and gradient. Energc Fuels plans to h„ve ;in<.lopcs greater <br />than 3:1. <br />The proposed mining operation will destroy two c`_ the three reservoirs in the <br />Eckman Pa r4: area. These two reservoirs were user for stock watering 3U :'oars <br />ago. Sind then, the}' 1•.ave been used on l by wildlife; therefore, [I~c loss c` <br />these reservoirs would no[ affect water users do~'nstream. OS"1s special <br />stipulation for wildlife (+'.'S) will mitigate any adverse impacts caused b <br />destruction of the two reservoirs. <br />`;nergy Fuels will monitor surface-water qualit:: wee4;ly and measure <br />temnera[ure, p`!, electrical r.onduc[iaity, oil, and grease. Flumes in <br />the stream will be gaged cnntinunusly, and flow wi'_1 he measured wee4;ly at <br />weirs. The compan}' will report on discharge quality auarter]•. in accordance <br />with the water-quality permit (KPDES). <br />lmpacts [o the surface-water re^ime will in•_]u.~io increased total dissolved <br />solids, increased suspended solids, evaporation of Lrt,pounded water, and <br />destruction of two of three reservoirs in file area. !loweyer, Encr•,v Fuels <br />plans [o apply adequate mitigating measures to o:tset th•_se impacts, .as <br />described in [he mining ant reclamation plan. "byre ma}' be a long:-ter-, <br /> <br />- 11 - <br />