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<br />. <br /> <br />. tIIOit. <br />Woodward..c.~de Wi' <br /> <br />{\;j C <br />!./U j j 1-- <br /> <br />---'-- <br /> <br />"" <br /> <br />Engineering A 1C.nou ~iC 10 tl'la urm '" ils .llYironm.nt <br /> <br />July S, 1994 <br /> <br />Water Supply and StDrage Company <br />P.O. Box 1584 . <br />Fort Collins, CO 80522 <br /> <br />Subject: <br /> <br />Long Draw Dam Safety Considerations, <br />Long Draw Dam Near Cameron Pass, CO <br />Project No. 23595G-9751 <br /> <br />Gentlemen: <br /> <br />On the 22nd of June 1994, I attended a meeting with you to discus.~ a request from the <br />Forest Service to submit a proposal to them to provide a by-pass flow of 2 1/2 cubic <br />feet per second from Long Draw reservoir during the winter months. <br /> <br />As you are well aware, I have been assisting Water Supply and Storage Company wit.>1 <br />their engineering since 1971, and have been involved with the operation and re- <br />cDnstruction of Long Draw Dam and its primaxy source of water, the Grand River <br />Ditch, since that time. I have inspected the dam, the outlet works, and the Grand <br />River Ditch generally on an annual basis since 1974. The current normal operation of <br />the reservoir is to close the outlet gates at the end of the irrigation season in <br />September or October, leave the gates completely closed during the winter and spring <br />months (November through May), collect water during the spring runoff via the Grand <br />River Ditch and then provide irrigation water to Larimer and Weld County farmers <br />during the su=er months. <br /> <br />T .ong Draw Dam is situated approximately 3 miles nDrth of Cache La Poudre Pass at <br />an elevation of approximately 10,000 feet above Mean Sea Level. The reservoir lies <br />in a north-east, south-west direction with the dam located on the north easterly end. <br />During the winter months the wind direction is predominantly out of the south-west <br />and appears to flow up the Colorado River Valley through La Poudre Pass and across <br />the reservoir. The area is subjected to extreme winter weather conditions and access <br />during the winter months in extremely difficult, if not impossible at times due to <br />normal snow fall and snow drifts. <br /> <br />2lS'SG.!I7S11Ull 117-<lS-94(%:t'pmlIRP'l' <br /> <br />W-4lnowd-e1Jd'lf Cal'Dl&tblnb .. A ~ub&i\:lia.ry ot Woodward-olyde Group. Inc. <br />Stlnford Placa 3, Suita 1000 . .ss2 South Ulster Slreet - C"""er. Coiotado 80237-2637 <br />3O:l-694-2770 . Fax:303-694-3946 <br />