Laserfiche WebLink
Taylor Park Reservoir is simulated using two storage accounts: 1) UVWUA's senior decree for <br />? <br />111,260 acre-feet, limited to the actual capacity of 106,230 acre-feet; and 2) the Upper <br />Gunnison District's refill decree for up to 106,230 acre-feet. <br /> <br />The UVWUA has the ability to meet the irrigation demand for the Uncompahgre Project canals <br />? <br />using its exchange credits in Blue Mesa in addition to the amount of water in storage in Taylor <br />Park Reservoir under the UVWUA's senior decree. This is limited to the available capacity in <br />the Gunnison Tunnel (1,135 cfs) after exercising the tunnel's direct flow water right to its full <br />extent. <br /> <br />The maximum releases from Taylor Park Reservoir are limited to the values given in paragraph <br />? <br />22 of Case No. 86CW203. The releases from Taylor Park Reservoir are credited directly into <br />the UVWUA's credit account in Blue Mesa Reservoir, and are also available to satisfy instream <br />flow water rights located between Blue Mesa and Taylor Park. <br /> <br />MODSIM does not have an exchange credit account in Taylor Park Reservoir for the United <br />? <br />States. MODSIM allows the UVWUA to make releases in excess of its credits in its Blue Mesa <br />exchange credit account. A debit in the UVWUA's account would represent a condition for <br />which the UVWUA would owe the United States water. MODSIM will not allow these <br />exchange debits to exceed the amount of water in storage in Taylor Park Reservoir under the <br />UVWUA's senior decree. Consequently, the UVWUA would always have stored water <br />available to repay any debits it owes to the United States. <br /> <br />Any water remaining in the Upper Gunnison District's account in Taylor Park Reservoir at the <br />? <br />end of any water year (October) is booked into the UVWUA's Taylor Park account. Remaining <br />water in storage in Taylor Park Reservoir, together with any accumulated credits in Blue Mesa <br />Reservoir at the end of the water year, is charged against the one annual fill of the UVWUA's <br />senior water storage right in the next year. <br />3.0 CONCLUSIONS AND RECOMMENDATIONS <br />The integrated operation of Taylor Park and Blue Mesa reservoirs is complex and is dependent upon a <br />number of considerations that have varied widely on a historic basis, including changing patterns of <br />release from Taylor Park to sustain a fishery on the Taylor and Upper Gunnison rivers, varied use of <br />storage water by the UVWUA (strict administration versus ?good neighbor? policies), and the USBR?s <br />policies with respect to power generation and minimum streamflows below the Aspinall Unit reservoirs. <br />These factors make it difficult to establish a set of monthly storage targets to simulate future operations <br />of these reservoirs. <br />For the MODSIM prototype, the model structure has been designed to replicate the current methods of <br />operation of these reservoirs. Target storage levels were determined through analysis of historic end-of- <br />month contents and are presented as a set of three targets for each month of the year, depending on the <br />nature of the annual runoff. It is recommended for future CRDSS efforts, that, in conjunction with the <br />USBR, additional work be devoted to development of more reliable targets based on stream forecasting <br />methodologies. It is also recommended that the State and the CRDSS consultant continue to evaluate the <br />effects of the informal agreements with the UVWUA regarding the ?good neighbor? operations. <br />8 <br />A275 01.09.95 1.15-21 Fosha, Hyre <br />