Laserfiche WebLink
C C <br />&V <br />March 4, 1997 <br />Cripple Creek & Victor Gold Mining Company <br />A Joint Venture - Pikes Peak Mining Company, Manager <br />Operations Office <br />P.O. Box 191. 2755 State Highway 67 <br />Victor, CO 80860 <br />(719) 689 -2977 • FAX (719) 689 -3254 <br />SENT CERTIFIED RETURN RECEIPT REQUESTED <br />P 289 926 512 <br />Mr. Berhan Keffelew <br />Environmental Protection Specialist <br />Colorado Department of Natural Resources <br />Division of Mines and Geology <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 _ <br />Denver, Colorado 80203 <br />Reference: Cresson Project: Permit M -80 -244: Surface -Water Drainage Modifications For <br />Arequa Gulch Overburden Storage Area. <br />Dear Mr. Keffelew: <br />The Cripple Creek & Victor Gold Mining Company ( "CC &V ") submits herewith a revised <br />surface -water drainage plan for the area of Arequa Gulch in which CC &V is placing oxide <br />overburden. The design and computations on which the design is based are attached. The <br />principal reason for submission is the need to place overburden over the diversion ditch initially <br />constructed along the northeast side of the Gulch. The time is now upon us where this <br />temporary diversion no longer serves the purpose for which it was constructed. CC &V needs <br />to divert the runoff from the undisturbed area, as well as the runoff from the disturbed area, into <br />a series of impoundments. All of the principal impoundments are in place and, in fact, currently <br />serve to retain all flows from disturbed areas associated with the Arequa Overburden Stockpile <br />area. <br />Englewood Office <br />P.O. Box 5078, 5251 DTC Parkway, Suite 700 <br />Englewood, CO 80155 <br />(303) 889-0700 • FAX (303) 889 -0707 <br />As you will see from the Attachment, CC &V's objective is to retain the flows from the 10 -year, <br />24 -hour precipitation events. Three substantial detention ponds, either excavated or created by <br />enhancing a depression with overburden and nearby colluvium, are the principal means of <br />retaining the flow. Two of the detention structures border the northeast side of the existing <br />diversion ditch along the southwest side of the Gulch and one detention structure borders the <br />northwest side of that same diversion in the area from which clayey colluvium was extracted in <br />1996. All of them are, effectively, excavated ponds. <br />Q7 ( <br />