2025 Great Notch Reservoir Dam Maintenance

City of Pendleton

Rehabilitate two welded steel water storage tanks: the 1.8-million-gallon Water Filtration Plant (WFP) Clearwell and the 1.1-million-gallon Southwest Reservoir. Work will include surface preparation, coating, removal and replacement of compromised materials, reinstallation of structural and operational components, sealing, and disinfection of tanks upon completion. The Clearwell project involves removal and replacement of baffling, repair or replacement of deteriorated steel and rafter supports, recoating of interior and exterior surfaces, resealing of foundations, and coordination with a structural engineer for material assessment.

U.S. Army Engineer District Seattle

Dam grounds maintenance. Provide grounds maintenance services near the powerplant, at all the project campgrounds.

Town of Fountain Hills

Providing professional services consisting of "dam sediment removal & maintenance" (the "services"); sediment removal: excavation and proper off-site disposal of accumulated sediment from upstream and downstream storage areas, including all hauling and dust control. ; structural maintenance: cleaning, repair, and/or reconstruction of inlet and outlet control structures, including trash racks, energy dissipators, sluiceways, spillways, and reinforced channels; headwall and culvert repair: repair or reinforcement of damaged concrete headwalls, culverts, wingwalls, and low-flow channels as identified in inspection reports or task orders. See outside link.