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<br />C'orrvnen t s <br />Page 3 <br />Detention Basin (Pit <br /> <br />• <br />For the Division to approve thn use of this p.it ns a dntcntion pond and develop- <br />ment waste disposal pit, the following information is required: <br />1. The applicant nr_eds to provide a chemical analysis of the roof. and <br />floor material to be disposed in this pit. <br />2. A map must he provided at suC(icir~nt sr..tlr- .~:, to show the inside <br />contours of the pit and an .icon at 1e_ast 500 fact adjacent to the pit. 'fhe <br />map should identify.ditch inflow points, Middle Creek, the proximity~of proposed <br />reclamation, recl~am.ition buffer zone around thn pit, the location of access <br />roads used to dispose rock into the pit, and the point of mine water d.ischaryc. <br />3. Nt East-Nest cross-section of the pit m~rst be provided which show; <br />elevations on the Y-axis, alluvium and geoJ.ngic units within the cross-section, <br />and the location of aquifers and Local water tables. The cross-section should <br />extend at Least 500 feet (Jest of the pit. <br />4. The applicant mutt provide a schedn7r~ that indicntr•s the vo/um~ of <br />rock to be disposed within the pit during the fi vr_-yoar permit Lerm. <br />The Division needs this in forrnati on to asses: nOC, vr~ri f~l pit storayc area for <br />water and rork, movemznt of water in Co and out oC the pr t, and assess possible <br />changes in water quality. <br />Pond Z <br />1. IJhat disturbance i.s there in thrr ditch T-i w.ltnr.She!1? Thr_ calculations <br />indicate 0.51 acres oC disturhance. If there is no dtaturhance inthis area out <br />side of roads, no sediment control in needed. <br />2. Is the topsoil stncY.pile the only distnrb~:urce contributing to ditch <br />.Z-3? LC so, with little disturlran ce, the Division wnnlrl crrn~idr,r n small aron <br />exemption for this area. hle might 1» able to mako the finding that runoff from <br />rite site is negligible and that construction of Lhe diCCh i:rtul•1 rrnr;e more <br />disturbance and erosion th.vt leaving fhe ;ire alone. I'r`rh•rps a small. lr~rm or <br />ditch on the downgrade base of the pile is all that is n%•eded. Climinal,irin of <br />ditch Z-3 would cut coats, disturbance, and dcrrr•asc th^ bond vrJlwrr nC4r1r.`d (or <br />Pond I. It is up to Energy I'ucls ns to Whnth4r you r•rnnt to pursue this. <br />J. ~ L/hat activiLir: nr.^ c•ondur:Cerl in Ch<~ di ;rurl,~~d .rr•~.i of th•r w•itc•rr;h••d <br />area of ditch I-2? The mop; indicaf_c that th i:; :vr~n i:: .n wn rr~hnn:;e-::hpp nn~a. <br />Zf the si tc has limited traffic, thr• opera for may wish F.o cnnsidc•r plar:rmrm f. of <br />a berm around the comple.r of suffici eat height to contain n 10-n^rrr ev~vtt. If <br />this is practical, with on Ll 1-].;2 ar, res of disturhance, tlr•t Division may e~ntsider <br />a small area exemption. IJC maq hn able to make thc• finding that Chc primnr~l area <br />of disturbance is the access roar] around the shop (N•Nirh may bo exempt from <br />point source limitations], that .coal Pines and erosion arc not significant, and <br />that no point discharge would occur as the result of a 10-scar event. <br />