WSP08921 - Laserfiche WebLink

Home Browse Search

. . . ....;;' (~ r ,.. ..... .J _./ AODIISSI[Pn10 OISl,rCTUGIH[l1l ~ S aRlIIl (H~'Hl[1l OISUICl Olila~a 60\IU s POSIOIFICI AHOCOUR1HOUSI 115 HOIIH 11l~ SlRl[T UUHA HE!IAS,A UIOl .[Hl10 U. S. ARMY ENGINEER DISTRICT, OMAHA CORPS OF ENGINEUS 6012 U S POSI O'FlCE AND COURT HOUSE OMAHA. N[BRASKA 68]02 MROGR-A 14 September 1965 Mr. H. F. Dugan Director, Regional Office, Region 7 Bureau of Reclamation Building 46, Denver Federal Center Denver, Colorado Dear Mr. Dugan: In accordance 'fIi th the disclJ..s~ions .,nth Mr. BeTg and members of your Project Development Staff on 26 July 1965, we have completed an evaluation of the flood control requirements for the Narrows unit. Because of the relatively short period of time available for completing this study, the information furnished in this letter has not been reviewed by our Missouri River Division. Therefore, benefit and storage values presented herein are subject to change. Average annual flood damages and flood control benefits, as related to the Narrows project, were developed on the basis of eXisting condi- tions and 1965 price levels. These evaluations considered that the Chatfield Dam and Reservoir project would be in operation. Computations were based on conditions with and without diversion of Bijou Creek flows and the operation study furnished by your office. On these bases, average annual flood damages are estimated at $1,730,000. Average annual flood control benefits attributable to the Narrows project would be $961,000 without diversion of Bijou flows and $1,123,000 with diversion of Bijou flows. In order to obtain the above cited flood control benefits the amount of flood control storage required at the Narrows project wbuld be 550,000 acre-feet and outlet capacity up to 10,000 cubic feet per second would have to be available. If you GO choose, 75,000 acre-feet of the 550,000 acre-feet could be joint-use storage, to be available in eaTly spring each year.