capital improvement Projects

The City’s Capital Improvement Projects are developed based on meeting the future needs of the various utilities and street systems and are generally formulated through a comprehensive planning process.

2021 Projects:

Wastewater treatment plant improvements

The City’s 2017 Wastewater System Facilities Plan describes a series of projects that need to be completed at the WWTP to allow the City to reliably and safely convey and treat sewage from the City. These projects add redundancy, enhance reliability, improve worker safety, support environmental requirements and eliminate hydraulic bottlenecks. Phase 1 construction should be complete in early 2021. 

Phase 1 upgrades include: 

  • A new 80 foot diameter clarifier, including launder trough covers, weirs and scum baffles, clarifier sludge and scum collection mechanism, scum and waste activated pumping systems and RAS flow control system.
  • Rehabilitation and reconstruction of the existing clarifier.
  • Upgrade of UV disinfection system, including installation of new disinfection equipment.
  • A new mixed liquor pumping and flow splitting system.
  • A new effluent flow metering system.
  • A new automated secondary effluent pipeline flushing system.
  • Relocation and upgrade of the existing plant washwater system.
  • Site stormwater improvements.

City Contacts

Tom Mohr, PE
Deputy Public Works Director
425-888-7653

Carrie Smith
Public Works Coordinator
425-888-7651

A detailed list of recently completed, ongoing and future capital projects is available on the 2021 Capital Project Update (PDF).