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2311 I Refinement of data and costs for Wiggins Daul and Reservoir is not warranted because the most conservative estin~te of $10,500,000 is substantitally greater than the Bijou control ~lOrks associated with Narrows Dam and Reservoir. Control at Narrows Reservoir A preliminary cost estimate \TaS also made for controlling Bijou Creek floods by di~'eG and channelizing into the potential NarrOlls Reservoir. This was the plan proposed in the 1951 report. Costs were taken from this report and indexed to present price levels. They include costs for relocations, dikes, and ',aterways. To these costs \/ere added rights-of-way associated "ith control of Bijou Creelt. The total costs were about $4,870,000. The Corps of Engineers has indicated a need for 40,000 acre-feet more flood control space in Narrows Reservoir if Bijou Creek is diverted into it. Also, about 90,000 acre-feet more space would be l'equired for 100 years of sediment contributed by Bijou Creek. This additional 130,000 acre- feet of spacc would require about 3 feet additional height on the dam at an estimated added cost of $1,369,000. ...... The total cost of including Bijou Creek Control in Narrows Reservoir is estimated to be $6,239,000. Controlled ground water recharge could not be provided by this plan. f, The attached Dra'ling #553-730-3 ShOUB the channelization plan which would require abandonment of the existing Bijou Reservoir No.2. Data and Costs--Narrows Reservoir The reconnaissance cost estimate for the potential Narrm-Is Reservoir without Bijou Creel, control is $38,334,000 at February 1961 prices. This cost includes $6,520,000 for right-of-llay end $1,525,000 for relocations and protcctive works associated \~th oil development in the reservoir site. Approximately 7,300 acres of irrigated crop land and 1,000 acres of meadOll land would be purchased. The damsite is at the location used in the 1951 report, about 7 miles upstream from Fort Morgan, Colorado. The dsm "ould have a crest length of about 4 miles end a crest elevation of 4,449 feet (5 feet lower than shown in the 1951 report because of less severe flood routing requirements). The height above streambed "ould be about 142 feet. The dam uould be earthfill, and it would have riprap on the upstream face. About 11 million cubic yards of embankment llould be required for the dam. Allocation of the storage space including provision for Bijou Creek control is listed by functions in Table 4. '. 9