GENERAL55811 - Laserfiche WebLink

Home Browse Search

• III IIIIIIIIIIIII III • ~E~E,~Eo ~~ Cripple Creek & Victor Gold Mining Company /U( ps,995 A Joint Venture -Pikes Peak Mining Company. Manager (1 ~ 7 Operations Offlce Englewood Offlce Division o1 iy L~OXT.YV/ PO. Box 191, 2755 State Highway 67 5251 DTC Parkway, Suite 700, Englewoo~~alg ~v Victor, Colorado 80860 Colorado 80111 t'eplogy (719) 689-2977 • FAX (719) 689-3254 (303) 889-0700 • FAX (303) 889-0707 June 28, 1995 Mr. Berhan Keffelew Environmental Protection Specialist Colorado Department of Natural Resources Division of Minerals and Geology Office of Mined Land Reclamation 1313 Sherman Street, Room 215 Denver, Colorado 80203 Reference: Response to Your Request To Document Arequa Gulch Spring Collection System. Dear Mr. Keffelew: In accordance with your request of yesterday, the Cripple Creek & Victor Gold Mining Company is providing a copy of the letter prepared by Golder Associates explaining the final installation of the Arequa Gulch spring collection system (provided as an Attachment to this letter). You asked for reasoning for elimination of the so-called "spring box." The spring box is designed to be placed on top of a discrete spring. It became obvious upon placement last Fall that there was no spring where the box was placed. It was also obvious that the spring system in Arequa Gulch did not consist of a single discrete spring. Therefore our plans were to investigate the system further in 1995 as construction was resumed. As we were able to investigate the spring system with the assistance of excavation of the valley and construction of a drainage channel, it became evident that the springs were relatively diffuse and the spring box would not serve any useful purpose. In fact, if the box were left in the system, what flow might be directed to it would have the potential to drain from the bottom back into the bedrock, As you know, there was no flow from the 4" diameter pipe joined to this box after its installation in 1994. This was further evidence that the system was not collecting the spring flow as we wished. The Attachment details the chronology for the installation of the perforated pipe and the solid pipe, as installed. As initially indicated, at no time during the installation was a single or small- area spring identified. Rather we encountered some moderate-sized areas in which the flow increased, as well as some damp areas. In this process, we examined the areas of wetlands to help identify parts of the spring system,