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Lynnwood outlines multi‑year plan to rebuild aging wastewater plant; initial cost estimate roughly $208 million
Summary
Public Works staff described a plan to replace and expand the 1962 Lynnwood wastewater treatment plant on a tight, sloped site, recommended GCCM project delivery, and said the early construction estimate (Class 4) was roughly $208 million with wide contingencies.
The City of Lynnwood’s public‑works leadership briefed the City Council May 19 on a multi‑year plan to upgrade the city’s wastewater treatment plant, a facility built in 1962 that staff describe as functionally aged and constrained by geography.
Director of Public Works Jared Bond, Public Works program manager Asan Sherkani and plant supervisor Tanner Boyle told council members the project will be the most complex and expensive Lynnwood has pursued and that constrained site geometry — the plant sits on a steep slope within Edmonds city limits and is surrounded by residential parcels — is a major challenge.
Why it matters: The plant must continue 24/7 while critical systems are replaced, staff said. The plant previously ran an incinerator for solids that failed emission standards and produced an administrative enforcement action; current biosolids are trucked off‑site. Upgrades will address regulatory drivers (including Ecology nutrient‑removal requirements), aging infrastructure and future capacity needs.
Project approach and timing: Staff said they…
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