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Council hears $35M membrane wastewater-plant proposal; staff add UV module to meet DEQ limits
Summary
Staff reiterated a plan to consolidate membrane-treatment upgrades into a single $35 million wastewater treatment project; they also proposed a fourth UV disinfection module to keep disinfection levels under DEQ limits and tied some headworks items to the new plant.
City manager and public-works staff emphasized the wastewater treatment plant expansion as a single, major CIP project estimated at roughly $35 million. Staff said they are consolidating multiple sewer-related CIPs into the new membrane facility and expect the expansion to drive near-term scheduling and financing decisions for smaller lateral and pump-station items; the membrane plant is currently a high priority and likely to shape when related projects occur.
For near-term compliance work, public-works staff recommended adding a fourth ultraviolet (UV) disinfection module to the existing system to keep the plant under DEQ limits while the larger membrane project progresses. Staff explained the UV arrays are reusable across control panels and that the new array would be compatible with the future system; one commissioner described the earlier $80,000 control-panel cost as a sunk expense required for immediate needs.
