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Revised 1/11/80 <br />• Section 780.21(b) Continued <br />solids. Zb solve this problen, Energy Fuels plans to re-establish <br />approximate pre-mining geometry and gradient of ephemeral stream <br />channels. To acoanplish this, the placenent of spoil needed to <br />achieve app~~~te original contour will be wncentrated between <br />stream channels. Spoil handling i5 discussed in more detail under <br />Section 816.101. Revised post-mining topography is shown on Enen3Y <br />Mines No. 1 and 2 Postmining Topography (Map 48) and EClanan Park <br />Postmining Topography (Map 49), Drainage Cross-Sections 1-10 (Map <br />59), Drainage Longitudinal Sections 11-13 (Map 60) and Drainage <br />Longitudinal Sections 14-17 (Map 6l). The locations of cross- <br />sections are shown on the cross-section indac (Map 58). <br />• <br />In sane instances there are existing steep-sided stream channels <br />controlled by bedrock geology, which could be unstable in the <br />postmining condition. Zb alleviate this potential problan, the <br />postmining topography has been designed to eliminate slopes steeper <br />than a 3:1 gradient. <br />Significant protection of surface water quality will be achieved <br />through the identification and marking of stream buffer zones and, <br />with the few exceptions discussed under Section 816.57, by nat <br />disturbing any area within the stream buffer zones. No streams <br />within buffer zones or streams classified as intezmittent or per- <br />ennial will be diverted. Stream buffer zones, as described in <br />u <br />780-154(b) <br />