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O ['~' ,),~ I '....v r Cost of the Closed Basin Drain activities through September 30. 1947. was $84.525. III. Rio GrEJ1de Division of the San Uuis Valley Project. The proposed works of the :aie Grende Division v111 provide 8Uppl~ mental __:ster for lands in Alamosa, Rio Grande a.nd Saguaehe Counties, Colorado. The authorized plan of development includes a storage reservoir of 1,050.000 acre-feet capacity at the Wagon .~eel Gap Dam Site, AI though the author! zing document provided general data pertaiIUn& to the Rio Gr~nde Division, all of the necessary detailed Inveltigations re- quired have been conducted since authorization. Field work on the topographic survey of the Wagon ~beel Gap Reservoir \188 begun in August 1940, vi th layout of a trbngulation net and measure- ments of the first base line. The General Land Office during the summer of 1941 ree8t~bli8hed land li~e8 and monumented corners in the reservoir area. Using information furnished by the General Land Office following completion of their retracement survey. ownerElhip maps were prepared of the reservoir area. , An appraisal board began field work in the reservoir area November 5, 1941. The appraisals included the determination of ~alvage values of improver:lents and the annual rente.1 value of each property. Land A.cquisiti.,t:. entailed two specialized problems, (a) values claimed for mineral deposits (Bentonite) and mill tailings in the vicinity of Creede, C~loredo. and (b) values cle.imed for springfl and damages to private cOJ:Jmf"rcial fish hatcheries end the rel?cntion of the Creede FederPl Fish Hatchery. For this reason requests were directed to the General Land Office and to the Flab and Wild- life Service for appraisals of the mineral deposits and of the fisheri~s. I The Regional General Land Office, Salt Lake City, Ute.h. completed field investigations of mineral ~eposit8 and submitted their report in September 1943. The Regional Fish and WildUfe Service, Albuqu'3!'li.Ue. New Mexico, com- pleted field investigations of commercial hatcheries and their report was received in August 1944. Concurrently with the above work stream ge.gine. flood damage surveys, and geologic exploration surveys and investigations yere carried out. Hydrological studies to dete~i~e the storable flov at the ~agon Wheel Gap DPm site ~ere made early in 1945. B1gh,~y relocations and drilling at the damsite were also mbde. A preliminary irrigated area and land use survey was ~ade to dete~lne the amour.t of irrigated lands, crop distribution. and irrigation practices for 340.000 acres in Al~ofla. B.io Grande and Saguache Counties. Final l~nd classification activities and economic studies were delayed pending completi?~ of similar work on the Conejoe Division. A search 3.