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<br />.. <br /> <br />.. <br /> <br />.. <br /> <br />Memorandum <br />Gunnison Hydrology <br />June 25, 1991 <br /> <br />11. Aspinall/Uncompahgre Active storage (AF) <br /> <br />Taylor Park Reservoir <br />Blue Mesa Reservoir <br />Refill Blue Mesa Reservoir <br />Morrow Point Reservoir <br />Crystal Reservoir <br /> <br />- 106,230 <br />- 748,430 <br />- 122,702 <br />42,120 <br />12,910 <br /> <br />Total Reservoir storage is divided into live storage and dead <br />storage. Live storage at facilities with hydropower is then <br />divided into active and inactive. Active storage is that <br />storage between full reservoir and minimum power pool, inactive <br /> <br />storage lies below minimum power pool and extends down to the <br />top of dead storage. <br /> <br />12. Approximate Distribution of the Natural Flow into Crystal <br />Reservoir <br /> <br /> USBR 1906-83 1977 <br />a. Historical depletions above Blue Mesa = 67,530 67,530 67,530 <br />b. Estimate future upstream depletions = 60,000 60,000 60,000 <br /> (subordination) <br />c. unregulated inflow between Crystal <br /> and Blue Mesa = 144,410 135,970 11,970 <br />d. Diversions to Gunnison Tunnel = 336,400 337,824 355,420 <br />e. Minimum Annual Releases from Blue = 419,600 419,600 419,600 <br /> Mesa to Senior Rights and Lake Powell =(218,176) (218,176) {218,176} <br />f. Estimated Marketable Yield from = 238,910 302,063 -518,520 <br /> Aspinall or alternatively remaining =(440,334) (503,487) (-317,096) <br /> undeveloped flow <br /> TOTAL 1,266,850 1,322,987 396,000 <br /> <br />Note: minus sign denotes a storage release. <br /> <br />Conclusion, you can see from this analysis that if the natural <br />(virgin) flow drops, depletions rise or a commitment of the enti~e <br />estimated marketable yield to the Black canyon of the Gunnison IS <br />made, it can virtually preclude all but the 60,000 AF increment of <br />future development in the Gunnison Basin. with this in mind, my <br />comments on the proposed contract between Reclamation and the <br />National Park service are as follows: <br /> <br />1. The Board mayor may not wish to be a signatory to this <br />contract. If you sign, you have significantly limited <br />avenues of objection but have made yourself a participant <br /> <br />4 <br />