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<br />:.: <br /> <br />000350 <br /> <br />CHAPTER 2 - PROPOSED ACTION AND AL TERNA TIVES <br /> <br />Alternatives <br /> <br />Alternatives evaluated in this environmental assessment include a No Action and Proposed <br />Action Alternative, <br /> <br />No Action Alternative: Morrow Point Reservoir water surface elevation would not be lowered <br />and. trash and debris would not be removed from the Morrow Point Power Plant inlet trash racks, <br />Trash and debris would continue [0 be collected on the trash rack. thus creating additional now <br />restrictions and reduced power generation over time, <br /> <br />Proposed Action: The proposed action would lower the water surface elevation of Morrow Point <br />Reservoir approximately 31 feet to about 7.129 feet using controlled releases from Blue Mesa <br />and Morrow Point D;zms and Power Plants. (Note: original plan called for lowering the reservoir <br />to 7.100 ft.). <br /> <br />Reservoir Draw Down and Trash Rack Cleaning Procedure <br /> <br />l. A slow draw down (1 to 3 ft.lday) of :Vlorrow Point Reservoir would begin in August <br />2002. beginning at an approximate elevation of7.l52 ft. (full reservoir is 7.160 ft.) <br />a, Surveyors would take a set of readings on the landslide points prior [0 the start of <br />this draw down to determine if there is any movement occurring, <br /> <br />~ <br /> <br />Draw down would continue until elevation 7.129 ft. is reached (on or about September~. <br />2002). <br />a. Surveyors would take a set of readings at elevation 7. [29 ft. Reclamation is <br />considering two altemati ves for monitoring landslides at interim elevations. The <br />tirst alternative would simply involve visual observations during reservoir water <br />. quality monitoring. The second alternative would survey the slides at 7.1 ~J ft. <br />and 7.135 ft. <br /> <br />3. At elevation 7.129 ft.. the trash rack cleaning would begin. The elevation would be held <br />at or about 7.129 ft. while a dive team cleans the trash racks, A team of four divers <br />would be working from a crane mounted on a barge. Trash would be removed and <br />transported off-site for disposal. The trash rack cleaning would require between 4 days, <br />and two weeks to complete depending on the amount of trash and difticulty in removal. <br /> <br />~. Once the trash rack cleaning is completed. the reservoir would be retilled. The rate of <br />retill would be determined and adjusted as needed [0 protect downstream water quality. <br />Turbidity monitoring points in Morrow Point Reservoir. Crystal Reservoir and the <br /> <br />6 <br />