Original publisher: [Portland, Or.]: Independent Economic Analysis Board, [2004] OCLC Number: (OCoLC)214107615 Subject: Fishways -- Columbia River Watershed -- Cost effectiveness. Excerpt: ...IEAB Juvenile Passage Cost Effectiveness page 9-amount of $ 2 million was to be established in 2004 to increase production at specific hatcheries, targeting stocks that are affected by the summer spill reductions. BPA funds would be allocated first and primarily to fish affected by the summer spill reductions ( i.e., fall and summer chinook salmon ) in subbasins not benefited by other offsets. Survival benefits were not quantified. The estimated net effect of reduced spill and offsets on non-listed stocks is shown in Table 5. Table 5. Estimated Net Effect of Reduced Spill and Offsets on Non-listed Stocks in the Amended Proposal ( Total juvenile losses ) 1 Action Estimated Impact Proposed summer spill operation-130,000 to-742,000 Hanford Reach anti-stranding + 1,094,870 to + 1,287,981 Pikeminnow control + 39,252 to + 84,549 Lyons Ferry actions + 200,000 Total Offsets + 1,334,122 to + 1,572,530 1. Impacts estimated using " NOAA Parameters, " as described in the text. Estimated total run size for non-listed fall chinook is 50 million juveniles ( smolts ) The NOAA survival analysis ( USDC, 2004b ) for Snake River fall run chinook juveniles showed that increased Brownlee flows would increase survival by 730 to 950 fish. Reduced spill would reduce survival by 140 to 940 fish, so net survival would increase by 10 to 590 fish, depending on conditions. The Amended Proposal Appendix C ( BPA and USACE 2004d ) showed estimates of benefits of northern Pikeminnow Management Program Augmentation by stock. Table 6 shows results. For every stock, estimated survival increases from pikeminnow program augmentation are less than the survival reductions in Table 2. 2.3.2. Revised Biop Offsets The Revised BiOp included increased Brownlee releases of 100,000 AF in July to mitigate for impacts ...