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Naches River Water Treatment Plant Screen Project

Naches River Water Treatment Plant Screen Project. Why did the City install a Screen?. September 13, 2006 David Brown Water/Irrigation Division Manager. Naches River Water Treatment Plant Screen Project. Water Treatment Plant and Intake Structure built in 1969 – 1970

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Naches River Water Treatment Plant Screen Project

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  1. Naches River Water Treatment Plant Screen Project Why did the City install a Screen? September 13, 2006 David Brown Water/Irrigation Division Manager

  2. Naches River Water Treatment Plant Screen Project • Water Treatment Plant and Intake Structure built in 1969 – 1970 • Moved to present location from Oak Flats • Plant put on line in 1972 • Idea was that water supply for the WTP would be from PP&L’s Wapatox Canal • Town of Naches Waste Water Effluent would be bypassed • Fish and debris screening done at Wapatox Canal diversion

  3. Naches River Water Treatment Plant Screen Project • As the issue of returning fish surfaced • John Easterbrook was instrumental in the installation of upstream barriers

  4. Naches River Water Treatment Plant Screen Project • The City’s WTP diversion was not addressed during Phase 1 of the BPA Screening • Wapatox had installed state of the art screens

  5. Naches River Water Treatment Plant Screen Project • Bureau of Reclamation and PP&L started conservations about shutting down the Wapatox • Looked like the canal would be down during the winter months • The City would need fish screens as water would no longer be screened by Wapatox

  6. Naches River Water Treatment Plant Screen Project • The City applied to BPA for funds • BPA grant for partial funding • The City applied to SRFB for funding • SRFB made small grant • Total Project cost $1,838,430 • $1,124,000 from BPA • $300,000 from SRFB • $414,430 from City funds

  7. Naches River Water Treatment Plant Screen Project • Main Structure built by a contractor • Chuck Lenberg and crew built and installed the screens and upstream barriers

  8. Before

  9. Screen

  10. Screen

  11. Screen

  12. Upstream Migrant Barrier

  13. Automatic Air Burst Backwash

  14. Automatic Air Burst Backwash

  15. Level Control

  16. Issues • Mud Behind Screens • Long way to run vacuum truck, but doable • Algal build up on screens in summer • Thought we could hand clean twice a year. Before Wapatox turns on and after they shut down • This year with the HOT we have had to hand clean about twice a month • Takes about an hour

  17. Issues • Slush Ice

  18. Naches River Water Treatment Plant Screen Project • Why did the City install a Screen? Tour this afternoon Questions? September 13, 2006 David Brown Water/Irrigation Division Manager

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