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<br />.~ <br /> <br />OOJ717 <br /> <br />from other power generators, Replacement power, especially during times of peak power <br />demand. represent an additional cost to W APA and it's customers. Most or all of the cost could <br />be recovered when Morrow Point Reservoir is refilled, as power generation at Blue Mesa would <br />be increased. The extent that costs could be recovered depends on the month. the days of the <br />week, and the times of day that increases in generation at Blue Mesa occur. Off-peak/non-high- <br />load periods of generation and by-passed water would also be considered a loss of power <br />generation. <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), Peaking of Blue Mesa <br />during the power emergency would likely result in additional suspended sediments and would be <br />used only as a last resort, <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 \lesa 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 />Commercial Guiding Services <br /> <br />Commercial guiding services have developed on the Gunnison River as a result of the high <br />quality of tishing. rafting. and sightseeing available to the general public. The majority of <br />commercial tloat and walk-wade fishing use occurs within the BLM's Gunnison Gorge NCA and <br />Wildemess. These activities are popular throughout the summer (May - early October) with the <br />highest annual use of the river by both commercial and private tloat and walk-wade fishers <br />occurring during June (stonetly hatch period), Float fishing by commercial guides is also <br />extremely popular in July, August and September. Any action that would reduce tishing success, <br />river navigability. or the aesthetic nature of the river will have a negative effect on commercial <br />guiding services. <br /> <br />The majority (79.4'70) of visitation at the Curecanti National Recreation Area. the Black Canyon <br />of the Gunnison National Park and the Gunnison Gorge NCA and Wilderness occur between <br />May and September. Effects to commercial guiding services are projected to be greatest during <br />this time period as well. <br /> <br />The greatest potential for increased turbidity during the trash rack cleaning could occur during <br />the reservoir refill. This is because sediments deposited in the reservoir, normally covered and <br />protected by the reservoir. would be exposed, Water moving over the top of these exposed <br />sediments during the reservoir refill would pick up and move the sediments. This type of <br />sediment movement was observed during the 100 I Crystal Trash Rack Cleaning. The controlled <br /> <br />19 <br />