2000-04-18_REVISION - M1999002 - Laserfiche WebLink

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• iii iiiiiiiiiiiu iii • STATE OF COLORADO I~R~M • DIVISION QF MINERALS AND GEOLOGY epa~ime~l of dlyla Resources 1317 Sherman 51.. Room ? 15 Denver, Colorado 80203 Phone: U071 866-3567 FAX: 13031832-8706 April 18, 2000 ~~ o/~~ ~ /~`j~Arz gyp. p~ p~2 q vc~c y (IG -C_ all Ir CI~t`m.~l a -~ t~~e DIVISION OF MINERALS GEOLOGY RECLAMATION MINING•SAFETY B~II Owens Governor Mr. Chris Freeman Greg E. Walther 1 b• AmerIC3R Soda, L.L.P. Erecmive Director Michael R. Long 2717 County Road 215 Division Director Parachute, CO 81635 RE: Piceance Site Temporary Lay Down and Parking Area, Yankee Gulch Sodium Minerals Project, Technical Revision TR-002, Permit No. M-99-002 Deaz Mr. Freeman: The Division of Minerals and Geology has completed a review of the above referenced technical revision application and proposes the issuance of a conditional approval. Stipulation No. 1 to the approval would be as follows: All runoff from the temporary lay down and parking area will be routed to the lined storm water retention pond or will be treated using appropriate best management practices as described in the approved "Soil Conservation, Erosion and Sediment Control, Reclamation, and Revegetation Plan" for the Yankee Gulch Project. Stipulation No. 2 to the approval would require the submittal of appropriate additional bond to cover the cost to reclaim the temporary lay down and parking area. The remainder of this letter and attachments discuss the derivation of [he appropriate bond amount. It is stated in the technical revision TR-002 application that excess cut material from the Piceance Site facilities area is being stored in the temporary lay down and parking area. This material may require grading prior to topsoil replacement at the time the lay down area is reclaimed. Assuming a grading volume equal to one acre foot of dirt for each acre disturbed in the lay down azea, the Division has estimated a cost of $7,611.00 for grading of the lay down area (see the attached estimating sheet for bulldozer work). The cost estimated for topsoil replacement is $6,418.00 (see attached estimating sheet for scraper work). The cost for revegetation of the lay down area is estimated at $27,764.93, and was derived as follows. The approved reclamation plan calls for focussed shrub establishment on 20 percent of the disturbed area, or 2.3 acres of the lay down area disturbance. The unit cos[ for shrub establishment is $6,396.07 per acre as calculated on the estimating sheet for task #21 from the Division's 6/10!99