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City updates design and $36.75M estimate for wastewater plant primary treatment and UV upgrade

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Summary

Design for upgrades to primary treatment, screens, grit removal and UV disinfection at Traverse City's wastewater treatment plant is over 90% complete; the 90% cost estimate is $36.748 million and construction is expected 2025–2028.

City staff and the design-build team told the commission the wastewater treatment plant primary-treatment and ultraviolet (UV) upgrade project is over 90% through design and moving toward trade-package bidding.

Art Krieger, the city's director of municipal utilities, said the project replaces obsolete primary settling tanks and screening and improves grit removal, pumping and UV disinfection. The upgrades respond to hydraulic and treatment requirements in the facility’s administrative consent order, staff said; they are intended to improve reliability and treatment efficiency, not to expand the plant’s permitted capacity.

Doug Urquha…

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