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>, UC-700 2/28/73 Preliminary Summary Sheets Bostwick Park Project Location Montrose and DUlli~ison Counties, west-Central Colorado, in Gunnison River Basin of Upper Colorado River Basin. Authorized Authorized as a participating project with the Upper Colorado River Stor- age Project by Public Law 88-568, September 2, 1964 (78 Stat. 852). Current Status Construction of Silver Jack Dam, the major feature of the project, was initiated in 1967 and was completed 'in 1971. Water storage in the reser- voir initiated in the fall of 1970 and the reservoir filled in the spring of 1971. Project water was made available to maintain minimum flows for fish in Cimarron Creek below the head of the Cimarron Canal in the summer of 1971. and delivery of irrigation water under special contracts began in 1971 to those lands under existing ditches. Until the conveyance systems are completed, particularly the rehabilita- tion of the existing Vernal Mesa Ditch, a substantial portion of the available irrigation water 'cannot be delivered to the project lands. All of the other project features are scheduled for construction during . the next 3 to 5 years. Plan of Development Unused flows of Cimarron Creek, a tributary of the Gunnison River, are being developed for irrigation, recreation, and sport fishery enhance- ment. Storage regulation is provided at the recently completed Silver Jack Reservoir on Cimarron Creek. Released storage water and usable na- tural flows will be diverted from the creek into the existing Cimarron Canal. Some project water will be released to project lands along the canal but most of it will be distributed by the existing Vernal Mesa and Hairpin ditches which head at the canal terminus. A pipe section of the Vernal Mesa ditch will be replaced and the Lytle and Bostwick laterals will be constructed to convey water from the ditch to lands that are above those presently irrigated. Recreational facilities will be pro- Vided by the Forest Service at the Silver Jack Reservoir. Certain mini- mum flows for fish will be maintained in the creek below the head of the Cimarron Canal. Outstanding new recreation and fishery opportunities will be created at the Silver Jack Reservoir.