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002211 When Denver incurs a liability to repay Green Mountain Reservoir for water stored out-of-priority at Dillon Reservoir, provisions of the Blue River Decree, as more specifically described in a 1964 Stipulation and Agreement, allow Denver to replace the water owed by substituting releases from its Williams Fork Reservoir. In 1991, the agreements were again modified to allow use of the proposed Wolford Mountain Reservoir as an additional source of substitution supply for waters owed to Green Mountain Reservoir by Denver. Theses agreements also make reference to a requirement for Denver to maintain a pool of 1,000 acre-feet in Dillon Reservoir, which must be released to Green Mountain Reservoir, to the extent necessary to maintain the flow in the Blue River below Dillon Dam at 50 cfs. Definition of Green Mountain Fill. For purposes of administration of a fill for Green Mountain Reservoir, there are two separate accounting procedures. The first is the Blue River Decree Fill and is computed as the sum of: (1) water actually stored in Green Mountain since the initiation of storage for the year (typically between April 1 and May 15); (2) releases of all inflow since the initiation of storage greater than the amount required to satisfy operating criteria provisions, including downstream rights senior to August 1, 1935 (60 cfs for downstream senior rights); (3) depletions caused by Senate Document 80 beneficiaries, including contractors, whose rights are junior to August 1, 1935 and are located upstream of Green Mountain, and (4) the contents of Green Mountain Reservoir at the time of initiation of storage. A Blue River Decree Fill is achieved when this sum equals 154,645 acre-feet. Note that the Blue River Decree Fill excludes water bypassed for instream flows but includes any water that is released for the sole purpose of hydro-electric power generation. This fill limit is specifically defmed for the benefit of Denver and Colorado Springs, both of which are allowed to store out-of-priority as against the Green Mountain power right because they have agreed to compensate for power interference. The second type of fill is the Division 5 Fill is essentially the same except that the sum excludes the releases of inflow that are made solely for purposes of hydro-electric power generation. This provision reflects that these releases of inflow are essentially bypasses for the direct flow right rather than storage releases. Green Mountain Reservoir has a senior re-fill storage right in the amount of 6,316 acre-feet, with an appropriation date of August 1, 1935. It can only be exercised after completion of the Division 5 Fill. Releases for replacement of depletions of Senate Document 80 beneficiaries and replacement of evaporation losses can be credited to the re-fill account. If any re-fill water remains in storage at the start-of-fill, it is considered as part of the contents of the reservoir for the next year's fill. There is a conditional junior re-fill storage right for Green Mountain Reservoir (Case No. 88CW22) for 154,645 acre-feet which can be exercised only after the senior re-fill right is satisfied. For purposes of accounting, the junior re-fill right has the same administration date as the conditional re-fill right for Dillon, pending in Case No. 87CW376. When in priority, the available flow shall be divided in a manner which essentially allows Green Mountain to store its share of the inflow originating below Dillon and allows Denver to store its share of inflow originating above Dillon Reservoir. Denver will observe the 50 cfs bypass and Green Mountain will observe the 60 cfs/85 cfs bypass requirements. These bypasses are not considered storable inflow for the junior re-fill right. Water stored under the Dillon re-fill right before Green Mountain Reservoir achieves its Blue River Decree Fill, belongs to Green Mountain and is deliverable thereto (directly or by substitution) in the event that the Blue River Decree Fill is not realized. C.8.1.3 CRDSS Considerations Accounts in Granby Reservoir. For purposes of the CRDSS, Granby Reservoir was modeled with two storage accounts. 1. CBT/Windv Gap Operational Pool- 465,568 acre-feet reserved for the combined operations of the CBT Project and the Windy Gap Project. Windy Gap diversions would be placed in Granby storage only to the extent that capacity is available (either for storage in the reservoir or flow capacity in the Adams Tunnel). 2. Inactive/Dead Storage Pool- 74,190 acre-feet. Bypass Requirements at Shadow Mountain and Granby Reservoirs. For purposes of simulating the bypass requirements below Granby and Shadow Mountain reservoirs, the CRDSS WRPM includes a bypass demand just below these reservoirs that have administration dates just senior to the storage rights. The amount of these demands is described in the previous text. Demands at the Adams Tunnel. Historic deliveries through the Adams Tunnel are used for purposes of the CRDSS historical scenario and for calibration. For the CRDSS baseline scenario, total demands at the Adams Tunnel were obtained from the Northern Colorado Water Conservancy District. This future demand represents integrated operation of the CBT and Windy Gap projects, as well as integrated use of both Eastern Slope and Western Slope project reservoirs.