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su a 10-foot wide channel with 20h: I v side slopes was modeled. A 10-foot bottom width <br />channel has adequate capacity [o pass the Flow with a velocity of 0.54 fps which indicates that <br />[he actual ~8-foot wide channel would be more than adequate. Field observations support this <br />conclusion as there is no significant erosion present below the impoundment. Copies of the <br />SGDCAD+ runs are provided with this submittal. <br />(gJ The lice ujthe inrpoundnrent is adeyuute for its intended purposes. <br />This impoundment holds water at various times of the year which is adequate for livestock and <br />wildlife watering. <br />(hJ The ingxnrndmem trill he suitable, for the crpproverl posnnnling lutul rrse. <br />The approved postnining land use for Mine 2 is pastureland. This impoundment will be suitable <br />For postmining land use. <br />(i) The vertical portion of anti renurining higMvnll shall be located far enough below the <br />lurv-waterline along the full extent of highwull w provide adeyuute snfeh~ and <br />uccess./or the proposed water users. <br />There is no remaining highwall in this area. <br />(CI F_.ccuvrr[ions that toil! impound water during curd niter the mining operation shall hove <br />perimeter .elopes tlrut are stable crud shall nol be steeper Ihnn O.Sh: h~. Where .eurjrrce <br />rung/f enters the impoundment wren, the .tide slope .chull be prolec4ed against eroson. <br />Evcuvn[ed impoundments shall ureet al! applicable reyuirenrents nja.0i.9. <br />fhe steepest perimeter slopes around livestock water tank 6-b are 4h:ly and are well vegetated <br />and stable. Where surface runoff enters the impoundment, [he side slopes are also well vegetated <br />and stable which protects this area against erosion. This impoundment meets all applicable <br />requirements of 4.0.9. <br />(/OJ ,4I1 dunze and embankntettts [itut meet a• exceed dre lice or nlher criteria of 4.OS9(3j shall <br />be cer•ti/ied ro the DIVlSIOir by u qua(ifred regi.rlered engll7Per, rnlntedlatelV ufter• <br />consn'uction mrd nnnuullF r{rercufrcr, ns having been constructed crud nruinlahred to <br />currrply widr the reyuireurents ujd.0.i.9. .911 dams and embankments [hest do nor nreer the <br />.ere ur other criteria oj-1.0.i.9(3J sha(! he certified by a ynnliJied registered professional <br />cn,gineer. <br />A certification by a qualified registered professional engineer of livestock water tank 6-h, as <br />outlined in 4.0~.9(I I), is provided below. <br />(/ /) Certi/icnlion repa'ts for ul! impotmdmems shat/ inchlde sm[emems olc <br />(u) Erisving uad reyuired monitoring procedures and instrumentation. <br />Nit monitoring is existing or required for livestock water tank 6-b. <br />