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Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 2000.

Description: Pacific Northwest National Laboratory (PNNL) evaluated 21 Phase II screen sites in the Yakima River Basin as part of a multi-year study for the Bonneville Power Administration (BPA) on the effectiveness of fish screening devices. The sites were examined in 1997, 1998, 1999, and 2000 to determine if they were being effectively operated and maintained to provide fish a safe, efficient return to the Yakima River. Data were collected to determine if velocities in front of the screens and in the bypass met current National Marine Fisheries Service (NMFS) criteria to promote safe and timely fish bypass and whether bypass outfall conditions allowed fish to safely return to the river. Based on the results of our studies in 2000, we conclude that: in general, water velocity conditions at the screen sites met fish passage criteria set forth by the NMFS; most facilities were efficiently protecting juvenile fish from entrainment, impingement, or migration delay; automated cleaning brushes generally functioned properly; chains and other moving parts were well greased and inoperative; and removal of sediment build-up and accumulated leafy and woody debris are areas that continue to improve.
Date: March 1, 2001
Creator: Chamness, M. A.
Partner: UNT Libraries Government Documents Department

Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 1999.

Description: Pacific Northwest National Laboratory (PNNL) evaluated 20 Phase II screen sites in the Yakima River Basin as part of a multi-year study for the Bonneville Power Administration (BPA) on the effectiveness of fish screening devices. The sites were examined to determine if they were being effectively operated and maintained to provide fish a safe, efficient return to the Yakima River. Data were collected to determine if velocities in front of the screens and in the bypass met current National Marine Fisheries Service (NMFS) criteria to promote safe and timely fish bypass and whether bypass outfall conditions allowed fish to safely return to the river. In general, water velocity conditions at the screen sites met fish passage criteria set forth by the NMFS. Although velocities often fluctuated from one sampling location to the next, average sweep velocities typically exceeded approach velocities and increased toward the bypass. Mean approach velocities were below the NMFS criteria of < 0.4 feet per second (fps) at most sites (Table 1). Based on our observations in 1999, we believe that most facilities were efficiently protecting juvenile fish from entrainment, impingement, or migration delay. Most screens were properly sealed to prevent fish entrainment and injury, although potential problems were identified at several screen sites. Six sites (one fewer than the seven sites identified in 1998) had loose or damaged seals that might have allowed fish to be entrained (Table 1). Other sites still had spaces larger than 3/32 in. where small fish could possibly pass into the irrigation canal.
Date: April 1, 2000
Creator: Blanton, S.L.; Neitzel, Duane A. & McMichael, Geoffrey A.
Partner: UNT Libraries Government Documents Department

Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 1998.

Description: Pacific Northwest National Laboratory (PNNL) evaluated 19 Phase II screen sites in the Yakima River Basin as part of a multi-year study for the Bonneville Power Administration (BPA) on the effectiveness of fish screening devices. The sites were examined to determine if they were being effectively operated and maintained to provide fish a safe, efficient return to the Yakima River.
Date: December 1, 1999
Creator: Blanton, S.L.; McMichael, Geoffrey A. & Neitzel, D.A.
Partner: UNT Libraries Government Documents Department

Yakima Fish Passage : Phase II : Fish Screen Construction.

Description: Accomplishments in 2001--2002 were spotty and limited due primarily to right-of-way problems at several sites and unanticipated changes in scope at some sites. Changes in BPA funding procedures have also impacted our ability to accomplish previously scheduled work. The following is a brief summary of work accomplished and scheduled at the remaining Phase II sites. (1) Selah-Moxee Fish Screen--Construction at this site was started in October 2001 and was completed in March 2002. We have settled the contractor claims and have closed out the construction contract. The O&M Agreement with the irrigation district was also completed in 2002. Work remains to complete the Designer's Operating Criteria. (2) Scott Fish Screen--Considerable effort was spent in 2001 and 2002 to try to resolve right-of-way issues at this site. However, these problems proved to be insurmountable, and this site has been dropped from the Phase n Program. The only thing remaining on Scott (as far as the Phase n program is concerned) is to prepare a brief wrap-up report to send to all interested parties to summarize what has been done and to explain the status of the diversion from a fish passage standpoint. (3) Packwood Fish Screen--Designs and specifications for the civil works were completed for this screen in 2002. The screen, screen cleaner, and other metal work have already been fabricated by WDFW Screen Shop. Award of a construction contract was scheduled for September 2002. The BP A lands staff has experienced significant delays in obtaining an easement from the state of Washington for a piece of the John Wayne Trail right-of-way currently occupied by the existing screen. As a result, the construction contract has been rescheduled for award in the fall of 2003. We are ready to proceed with construction if BP A can obtain the necessary easements by May ...
Date: March 1, 2003
Creator: Region., United States. Bureau of Reclamation. Pacific Northwest
Partner: UNT Libraries Government Documents Department

Yakima River Basin Phase II Fish Screen Evaluations, 2001.

Description: In the summer and fall of 2001 the Pacific Northwest National Laboratory (PNNL) evaluated 23 Phase II fish screen sites in the Yakima River Basin as part of a multi-year study for the Bonneville Power Administration (BPA) on the effectiveness of fish screening devices. Data were collected to determine if velocities in front of the screens and in the bypasses met current National Marine Fisheries Service (NMFS) criteria to promote safe and timely fish passage and whether bypass outfall conditions allowed fish to safely return to the river. Based on our studies in 2001, we concluded that: in general, water velocity conditions at the screen sites met fish passage criteria set forth by the NMFS; most facilities efficiently protected juvenile fish from entrainment, impingement, or migration delay; automated cleaning brushes generally functioned properly; chains and other moving parts were well greased and operative; and removal of sediment build-up and accumulated leafy and woody debris are areas that continue to improve. Continued periodic screen evaluations will increase the effectiveness of screen operation and maintenance practices by confirming the effectiveness (or ineffectiveness) of screen operating procedures at individual sites. Where procedures are being followed and problems still occur, evaluation results can be used to suggest means to better protect fish at screening facilities. There has been a progressive improvement in the maintenance and effectiveness of fish screen facilities in the Yakima River Basin during the last several years, in part, as a result of regular screen evaluations and the rapid feedback of information necessary to improve operations and design of these important fish protection devices. Continued periodic screen evaluations will increase the effectiveness of screen operation and maintenance practices by confirming the effectiveness (or ineffectiveness) of screen operating procedures at individual sites. Where procedures are being followed and problems still occur, evaluation ...
Date: January 1, 2002
Creator: Carter, J.A.; McMichael, Geoffrey A. & Chamness, M.A.
Partner: UNT Libraries Government Documents Department