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Lynnwood staff outline multi‑year plan to upgrade aging wastewater plant, say phased work and contractor involvement will limit risk
Summary
Public Works staff presented a Basis of Design process and alternatives analysis for the city’s aging wastewater treatment plant, said upgrades are required to meet modern regulatory standards and described a phased approach with a GCCM delivery method; staff estimated construction could take 4–6 years and reported a recent ~ $6 million state low‑interest loan secured.
Public Works Director Walters and wastewater staff on Monday told the council the city’s wastewater treatment plant—built in 1962 and upgraded in prior decades—requires major upgrades to maintain compliance with modern regulatory requirements and to address aging systems.
Wastewater treatment plant manager Hassan Shirkani and supervisor Tanner Boyle walked council through the facility’s history and a recent facility plan. Staff said the plant’s original layout forces multiple pumpings and energy inefficiencies, several key components lack redundancy, and the city has relied on interim measures (the sludge handling system was taken offline in April 2024 and the plant has used…
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