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37 largest decrease in average annual yield, about 33,000 acre feet, is associated with increasing the capacity of the Gunnison Tunnel to 1300 cfs, which provides for proportionately greater senior irrigation diversions. (Compare Scenarios 5 and 7.> The next largest decrease in yield, about 32,000 acre feet, is associated with increasing the minimum stream criteria for Blue Mesa storage releases from 200 cfs to 300 cfs in the 29-mile reach, and with adding endangered fish flow criteria at Westwater and modest M&I releases. (Compare Scenarios 1 and 3.) Increasing the minimum stream flow criteria in the 29-mile reach from 300 to 600 cfs during the boating season decreases the average annual yield by about another 25,000 acre feet (compare Scenarios 3 and 5>, while asserting more senior direct flow water rights for minimum stream flows has little additional impact on the average hydropower yield. (Compare Scenarios 3 and 4, and Scenarios 5 and 6. > 7. If no senior downstream conditional water rights are developed, historic Blue Mesa operations improve the average annual yield for a junior hydropower water right at the Tunnel from about 210,000 acre feet to 293,000 acre feet. (Compare Scenarios 1 and 10.) Junior hydropower yield is reduced by the assertion of the 300 cfs P&M water right for minimum stream flow purposes, but is again improved markedly frmB about 108,000 acre feet to 284,000 acre feet by historic Blue Mesa operations. (Compare Scenarios 2 and 11.) Increasing the minimum stream flow criteria for Blue Mesa storage releases from 200 to 300 cfs and from 300 to 600 essentially reallocates some, but not all, of the flow benefits of WBLA, Inc. 1909 Bt'oadway, #3, Boulder, Colorado 80302