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Bellevue staff outline wastewater system plan updates, modeling for growth and lake-line replacement
Summary
Eric LaFrance and Emily Flanagan briefed the Environmental Services Commission on updating the 2014 wastewater system plan: updated hydraulic modeling, a 20-year capital strategy, I&I reduction, a sewer-extension program for ~1,500 septic parcels, and phased lake-line replacement planning; community engagement and a draft plan are expected in 2026–2027.
Eric LaFrance, planning manager for utilities, and Emily Flanagan, senior planning engineer, told the Environmental Services Commission that the city is updating its 2014 wastewater system plan to reflect current infrastructure condition, model future loads and develop a 20-year capital investment strategy.
Emily said the plan documents the existing system (about 500 miles of sewer main, 36 pump stations and 10 flush stations), summarizes operations and maintenance programs, and refines hydraulic models to identify capacity needs. She said the Bellevue…
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