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COMMENTS OF THE FEDERAL POWER COMMISSION FEDERAL POWER COMMISSION WASHINGTON, D.C. 20.426 IN REPLY REFER TO: Lieutenant General William F. Cassidy Chief of Engineers Department of the Army Washington, D. C. 20315 June 30, ly67 . Reference: ENGCWcPD . Dear General Cassidy: This is in reply to your letter of May 11, 1967, inviting comments by the Commission relative to your proposed report and to the reports of the Board of Engineers for Rivers and Harbors and of the District and Division Engineers on the Bear Creek Basin, South Platte River and tri- butaries, Colorado. The cited reports present plans for construction of the Mount Carbon Dam and Reservoir on Bear Creek approximately eight miles above its con- fluence with the South Platte River at Denver, Colorado. The project would consist of an earthfill dam, an unlined spillway, outlet works, and a reservoir with 28,400 acre-feet of storage capacity to the spillway' crest. The project would provide flood control, recreation, and fish and wildlife benefits, at an estimated construction cost of $28,800,000, of which $577,000 would be paid by local interests for recreation and fish and wildlife features. No provisions are included in the project plans for hydroelectric power development. .' . Studies by the Commission staff show that with the project constructed and operated as proposed, without regulatory storage capacity, essentially no dependable hydroelectric power could be developed. The studies show further that by enlarging the reservoir to provide storage capacity for flow regulation, only a small amount of power ,could be produced and its development would not be economically justified. Accordingly, the Commission concludes that construction of the Mount Carbon Dam and Reservoir in the Bear Creek Basin would not provide oppor- tunity for economical hydroelectric power development. Lee C'. White Chairman xxix