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3733 40 RUED! DAM AND RESERVOIR, COLO. at least. $1 million and may reach $3 million to $5 miUion. Litt.]e in- formation is readily available to forecast future values. Vl'ith future commercial oil shale development, howe.er, property values in these reaches should increase greatly. The Corps of Engineers conducted a flood damage survey after the 1957 flood which reached 18,700 cubic feet pel' second at the Glen- wood Springs gage on the Roaring Fork River. The total da.mages re-sult.ing from this flood along t.he re>lches of the Fryingpa,n and Roaring Fork Rivers below Ruelli Dam were estimated at $35,000. 'Vith present techniques and ability to forecast snowmelt. inflow, it will be possible to achie,'e pbmned e,'acuat.ion of the full active storage capacity of Ruedi Resern,ir in about 30 days. If the reser- voir is operated carefuJly for flood control by eva,cuation of storage prior to forecasted he:HJ' inflow, ahnost complete control of snowmelt floods in the resen'oir could be attained. The Corps of Enginee,.s has estimated t,hat the total a,verage annual future da.n1flges frOlll uncontrollecl tloo(l in n:ffected river reaches hp,t,wp.en Ruedi Dn.m and the Fryingpan and Grand .Jullction on the Colorado would 'UnOID)t to at, least $16,000. Operation of Ruedi Dam and Reser\'Oir fm. control of snowmelt floods will be compleme.nt,ary t.o its operl1t.ion for municipa.l H-Bel indust.rial water demands. and would prevent ft-olll ii'8,OOO to $1:\,000 of !\'verage annual flood dam- ages. For t.he purpose of this re.port a midpoint. figure of $11,500 is nsed as a. measure of a.nnual flood control benefits. Fi_,h alld wildlife The efreds of operation of Ruedi Dam a.nd Reservoir on fish anll wj]dlife were. evaJufl.ted b.y reconnaissa.nce by t.he Buren.1l of Sport Fisheries and Wildlife of the U.S. Fish a.nd Wildlife Service, Al- buquerque, N. ]I,[ex., with the cooRemt.ion of the Colorado Department of Game and Fish. The Bureau s memorandum report dated August 26. 19.\0, is reproduced as appendix B of t,his report. The evaluation of the, Fish and 'Yildlife Service indicates that. t.he Fryingpan River provides one of the best aud most heayily fished trout st.reams in Colorado. Fisherme.n enjoy mall}' man-days each year angling on t.he 7 miles of main sirea.m a.nd tributaries of the Fryingpan River ami three small la,kes-nll within the Ruedi Reser- voir site. The I'i,.er downstrealn front the damsite also is fished heavily. About 7 miles of the Fryingpan Ri,'er and tributaries and three small lakes will be inundated b:,<' the resen.oir. A~cording to a sur- vey by the. Colorado Dep:trtment of Gamc and Fish the trout popu- lation in. this reach is equal to or exceeds an,)' simila.r stream section in the St,a.te. The river wit.hin ihe reservoir sit.e. also contains spawn- inl(" groum\" probn.bly used by trout of t.he Ronring Fork River as well as t.he FryingpaJl. Annua.l fishing use of Ruedi Reser'voil', how- ever, is estimated at 25 fishermen per acre, or a total of 15,000 fisher- man-da.vs. The operation of Ruedi Resenoir as planned will reduce and stabilize the flows downst.re.a.lll from the dam. The more uniform Am.s will improye fish hahitat. and provide. better fishing conditions in early mont,hs of the fishing season. Good hahitttt and heayy fish- ing:: nlrendy exists on this reach; hence, increased use is estimated at about 5 percent.