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. g ~ ~ III ~I~IIIIIIIIII~II a GEC MINERALS, INC. FLORENCE, COLORADO 81226 303/784.6891 P.O. BOX 228 August 31, 1981 Mr. Tom Gillis Reclamation Specialist Colorado Mined Land Reclamation Division 423 Centennial Building 1313 Sherman Street Denver, Colorado 80203 Subject: Surface Runoff Controls Dear Tom: RECEIVED SEP 0 3 1931 MINED L4ND RFCIMIATIONCOA1: COLO, DEPT, p~ 1~~~.L RESOURCF$ This letter confirms our pleasant verbal agreement between GEC Minerals, Inc. and the State MLRD on August 28, 1981, regarding the ways GEC intends to carry out for reclamation as well as erosion controls as soon as the weather permits. The following are the agreement for each specific areas of concern, they are: -Gully type of erosions at the East side slope of reclaimed area: GEC will place riprap rock in those existing gullies all the way from upper collecting ditch down to Dam B area, and their surroundings. -Upper collf'ction ditch: A bank to be built up over the north end of this specific ditch to physically separate the disturbed area from the un- disturbed area and the upper portion of the undisturbed area will have to be smoothed our to increase the slope length-the soil loss per unit area generally increased substantialy as slope length increases. -Clean up sediments: The sediments of all the dams except temporary dam, need to be cleaned up as soon as possible. September 30, 1981 has been a tentative deadline set up for GEC s clean up plan. Any/all parts of the sediments cannot be re-used as a backfilling material for topsoil replace- ment unless complete chemical analysis report showing favorable for top- soiling. Should you have any questions concerning the above, please let me know. ince ly your , L . K . Chen ' '~"~~ ----- VP-Engineering and Planning LKC/des cc: F.E. Snider Dean MacKinnon