2.5 CFS Modular Design
These multiple installations along Widows Creek diversions provided valuable knowledge on previous operational issues, and helped to refine the current screen design.
In April of 2009, FCA worked with the ODFW John Day Screen Shop and Aquatic Contracting to install three modular Farmers Screens on the three diversions on Widows Creek.
Because of a number of operational issues, this project has been one of FCA’s most valuable in terms of knowledge gained. Through three years of monitoring and on-site meetings, FCA, ODFW, and BPA were able to identify operational issues, their causes, and develop solutions to implement. The lessons learned at the Widows Creek sites have shaped not only the current screen design, but also FCA’s approach to developing projects.
To address these issues, ODFW, FCA, and BPA worked together to conduct training sessions and distribute operation manuals to all operators of the system, regularly monitor the system, and modify the screens with enhanced sediment management systems and overflow pipes. As a result of these efforts, screen dewatering and sediment build up are no longer occurring. The remaining challenges center on improper operation of the screens, with by-pass flows being blocked or restricted due to low stream flows.