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002212 Accounts in Green Mountain Reservoir. For purposes of the CRDSS, the following five accounts should be provided in Green Mountain Reservoir: 1. CBT Replacement Pool- 52,000 acre-feet reserved exclusively for replacement of out-of-priority depletions (diversions through Adams Tunnel and/or storage in the CBT Project reservoirs. 2. Historic User Pool- 66,000 acre-feet reserved for Western Slope beneficiaries of Senate Document 80 with water rights perfected by use prior to October 15, 1977. All water delivered by exchange is assigned a priority of August 1, 1935. 3. Contract User Pool- 20,000 acre-feet reserved for water rights perfected by use subsequent to October 15, 1977 and which have valid contracts with the USBR for said water allotments. Reference is made to the attached listing of existing (January 1, 1996) contract users. These users are aggregated into those upstream of Green Mountain Reservoir and those downstream of the reservoir. 4. Silt Proiect Replacement Pool- 5,000 acre-feet reserved for operation of the Silt Project near Rifle (See separate documentation). 5. Inactive & Dead Storage Pool- 10,639 acre-feet. The releases from the historic user pool in Green Mountain Reservoir are directly related to the flow at the Shoshone Power plant and the downstream Cameo Demand. Since 1985, the releases are dependent in part on the actual demand (cfs) at Cameo. This is discussed in more detail under the topic of the Cameo Area Water Rights. For operations of Green Mountain Reservoir in the CRDSS WRPM, the operating rules were designed for the two distinct administration practices: 1. 1974 through 1984. Whenever the flow at the Shoshone Power Plant drops below an average of 1,250 cfs (during the period April 15 through October 15), the following direct flow transmountain diversions should be curtailed: Roberts Tunnel (WDID 364684) Continental-Hoosier System (WDID 364683) Homestake Diversion Project (WDID 374516) · Assume that the Orchard Mesa Check is in operation with the effect of reducing the magnitude of a call (See separate discussion). · Release from Green Mountain the amount necessary to increase flows at Shoshone to 1,250 cfs. The operation for the reservoir release should be tied to the instream flow node just below the Dotsero stream gage. 2. 1985 through 1992. Assume that the Orchard Mesa Check is not in operation with respect to a call on the upper river. Make releases from Green Mountain as necessary to keep the flow at Cameo at 2,260 cfs. Do not curtail diversions by transmountain structures. · The flow at Cameo should be the sum of the USGS gage at Cameo (Gage ID 09095500) and the Plateau gage (Gage No. 09105000). · Replacement releases should be made only for the appropriate Western Slope beneficiaries, i.e. industrial users and transmountain users are not entitled to the benefit. · The power right of the United States at Cameo is not entitled to benefit from releases from the historic user pool. · For the CRDSS historical model runs, beneficiaries of the historic user pool should include all water rights perfected by use through January 24, 1984. For the CRDSS baseline scenario, the water rights should limited to those perfected prior to October 15, 1977. Contract User Pool. In the CRDSS WRPM, those water right structures that are currently entitled to contract water from Green Mountain Reservoir are attached to the Contract Pool via an operational right. For the CRDSS baseline scenario, all other structures with Green Mountain contracts that are not now in the model, are aggregated as a single demand node just below Green Mountain Reservoir. This demand node is assumed to be 100 percent consumptive, since these contracts are primarily for augmentation uses. Table C.8.1.3a summarizes all of the contractors who are entitled to water in this pool. TABLE C.8.1.3a Green Mountain Reservoir Green Mountain Water Service Contracts Contractor Name een Mountain Use*