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<br />000754 <br /> <br />diversions through the downstream Gunnison Tunnel in the summer months. Within a 24 hour <br />period, releases for power production from Blue Mesa Dam can fluctuate between 0 and 3,400 <br />cfs, Morrow Point Dam between 0 and 5,000 cfs, while Crystal's releases typically fluctuate in <br />the 50 cfs range. When the Aspinall Unit is at maximum power productioo, daily fluctuations in <br />releases from Crystal Dam may increase to the 200 cfs range, <br /> <br />The Morrow Point Power Plant is able to generate electricity with a water surface elevation <br />range of 7, 160 ft. to 7,100 ft. As Morrow Point Reservoir's water surface elevation drops, <br />generation efficiency would be lost and fewer megawatts of power would be generated per acre- <br />feet released, To replace generation lost at both Blue Mesa and Morrow Point power plants, <br />during the periods of Morrow Point Reservoir draw down, W AP A would purchase surplus power <br />from other power generators, Replacement power, especially during times of peak power <br />demand, represent an additional cost to W AP A and it's customers, Some of the cost could be <br />recovered when Morrow Point Reservoir is refilled, as power generation at Blue Mesa would be <br />increased. The extent that costs could be recovered depends on the month, the days of the week, <br />and the times of day that increases in generation at Blue Mesa occur. Off-peakJnon-high-load <br />periods of generation and by-passed water would also be considered a loss of power generation. <br />W AP A conducted an economic analysis based on the draw down rate scenarios in Appendix C <br />(0.5, 1,0 and 1.5 ft./day) and estimates the generation difference as a result of the draw down <br />would be between 5,962 MWh to 7,714 MWh, Costs associated with each elevation change <br />range from $122,200 to $156,300, <br /> <br />If a power emergency occurred during the Trash Rack Cleaning Project, other facilities of the <br />CRSP (i.e, Flaming Gorge, Glen Canyon) would provide first response to the emergency. If <br />needed, Morrow Point releases would be made to address the power emergency as long as <br />releases kept the reservoir within the draw down criteria (I to 3 feet/day). <br /> <br />To facilitate the draw down of Morrow Point Reservoir and protect water quality downstream of <br />Crystal Reservoir during the trash rack cleaning project, releases made from Blue Mesa and <br />Morrow Point Reservoirs will be adjusted. Losses in power generation and the cost of <br />purchasing supplemental power during the trash rack cleaning are considered necessary general <br />operation and maintenance costs of the Aspinall Unit. <br /> <br />Test flow releases from Glen Canyon Reservoir as pan of the Glen Canyon Adaptive <br />Management Program during September 2002 to March 2003 would affect the Glen Canyon <br />Unit's ability to compensate for significant power reduction from the Aspinall Unit. If peaking <br />releases from the Aspinall Unit resulted in water quality concerns below Crystal Reservoir, it <br />may be necessary to postpone the trash rack cleaning project until the Glen Canyon test is <br />completed, Additional consultation with the Western Area Power Administration would be <br />needed. <br /> <br />18 <br />