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<br />iii iiiiiiiiiiiu iii <br />999 <br />UJ~oming Fuel Compon~ <br />' Golden Eagle /New Elk Mines <br />10250 Highway 12 • Weston, Colorado 81091 • Telephone (719) 868-2761 <br />Janusr}' 15, 1992 <br />RECEIVED <br />JAN 17 1992 <br />Mr. Joseph Dudash Mined Land <br />Reclamation Specialist Reclamation Division <br />Mined Land Reclamation Division <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Neva Elk Mine - Permit No. C-81-012 <br />Technical Revisions No. 23 <br />Response to Adequacy Revieca <br />Dear Mr. Dudssh: <br />Wyoming Fuel Company hss reviewed the deficiencies relative <br />to TR-23 listed in the Division correspondence dated <br />November 8, 1991 and responds ss d'ollows: <br />A. EAST PORTAL WATER TANKS <br />1. The Esst portal Water tsnlc ayes will be graveled /`'may, c2ca <br />with four (1) inches minimum thickness of gravel in ^'~ r~ <br />areas that are not vegetated. Po-FS ~ co,-c.~•~ i <br />'~ 2. The berm encompasses portion of the down sl~~ <br />perimeter of the caster tank area. A Swale will be <br />- constructed at the top of the road. <br />3. A k factor of 0.18 was derived from the SCS data ti?/~~°~ °~y <br />sheets from Trinidad Colorado. Since the soils in d,.~P,,.-r~6°"` , <br />question have been reworked, we used s weighted average ~jw„Q ~ <br />of the k factors throughout the soil column. Soil k=.i[~.,-Y~rLG~ <br />complexes are composites of several soil types, a o,t, <br />` average value caas calculated from each of the soils in <br />the complex. <br />,oii <br />1. A control practice factor of 0.11 sass used based on ~_Z ~._,,, <br />sn 80 to 85Y, ground cover with no appreciable canopy. ~~..~~IG, cP 6,oa <br />Q 35 This value can be found in the SCS report 1977 0, yam, ~, p,L <br />~~` ,,,.,~~ Procedure for Computing Sheet and Ri11 Erosion on d~-~.oi. ~.y ~,,, <br />,,,. ~'~' Project .treas. This ground cover will be established v"' ~ ~~~ ~ <br />either through revegetation and mulch or the placement ao-as'/.. <br />of gravel in cress that are not vegetated. <br />The value of 0.01 was used in some cases due to <br />rcunding to the nearest cne hundredth. <br />