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n ,) "'- "1 (l Ull:J.,-U CHAPTER 2-PROPOSED ACTION AND AL TERNA TIVES AL TERNA TIVES Alternatives evaluated in this environmental assessment include the No Action and Proposed Action Alternatives. No Action Alternative: Under this alternative, the Recovery Program would not construct or provide funding for operation and maintenance of a fish screen in the Redlands Power Canal. Adult and sub adult Colorado pikeminnow and razorback sucker could continue to become entrained in the Redlands Power Canal and be harmed, harassed or killed (take) by continued Redlands Water and Power Company (RWPC) operations. Proposed Action,;, Under the Proposed Action, the Recovery Program would construct a fish screen in the Red1ands Power Canal to prevent canal entrainment of adult and sub adult Colorado pikeminnow and razorback sucker. Reclamation would design and construct the fish screen and the Recovery Program would provide fish screen operation and maintenance funding to Red1ands Water and Power Company. R WPC would assume ownership of the fish screen. RWPC would also assume ownership of the Redlands Fish Passageway. The Service would continue to operate the fish passageway and RWPC would perform maintenance activities with funding provided by the Recovery Program. Fish Screen Design-the fish screen was designed based on the biology and characteristics of the Colorado pikeminnow and razorback sucker. Figure 1 provides a general site plan for the fish screen structure, which includes a fish screen, a bypass channel, and a fish return pipeline. The fish screen would be a "V -type" configuration with each leg of the screen being 160 feet long. The screen is designed for a total diversion of 890 cfs, returning 40 cfs for the fish return pipeline, for a total screened flow of 850 cfs. The mesh size used for the fish screen would be 3/32-inch. The fish pipeline would be constructed using 36-inch PVC pipe with a total length of approximately 460 feet. Maximum screen pipeline flow would be 5% of the diversion or 45 cfs. Upstream and downstream bulkheads would be used for isolation during screen fowling, icing, and other times when the fish screen is bypassed. The canal bypass channel would be constructed to bypass 850 cfs around the fish screen. Construction-The fish screen would be completed under Reclamation construction contracts. RWPC would continue to participate in the design process to ensure that the fish screen facilities would not conflict with the RWPC operations. Temporary construction 6