Increasing Water Capacity, Strengthening Water Infrastructure & Ensuring Clean, Reliable Drinking Water for Customers
In response to the need to provide additional water for growing communities in western Washington County, the Joint Water Commission (JWC) —owned in partnership by the Cities of Hillsboro, Beaverton, Forest Grove and the Tualatin Valley Water District — are working to complete a multi-year water treatment expansion, improvements project, and facility plan for the JWC Water Treatment Plant.
The project, a result of nearly four years of water supply planning, addresses long-term water capacity and strengthens seismic resiliency while bringing the capacity of the plant from 75- to 85-million gallons (of water) per day (mgd) by 2019.
In addition to new and enhanced water treatment capabilities increasing the plant’s treatment capacity and reliability, the project also involves strengthening water infrastructure and planning for a future plant capacity of 105-mgd. A facility plan has been developed to lay the groundwork for the immediate plant expansion as well as phased seismic improvements and expansions until ultimate plant build out.
The JWC currently treats, transmits and stores drinking water for more than 365,000 customers, and is the largest conventional water treatment plant in Oregon.
For additional information on how the project will help provide safe and cost-effective drinking water to the water service partners for current and future needs, contact City of Hillsboro Project Manager Erika Murphy at 503-615-6720 or by e-mail.
- Project Status: Currently under construction
- Completion: Summer 2019
- Total Project Value: $35 million
- Delivery Method: CM/GC
- Project Manager: Erika Murphy, City of Hillsboro
- Contractors: Jacobs (formerly CH2M) and Slayden Constructors
September 2018 Project Updates
- 24” diameter solids drying bed decant piping installation is ongoing. Decant piping recovers water used in the solids handling process and returns it back to the start of the treatment process.
- Drying bed underdrain piping (6” diameter perforated pipe) was completed.
- Installation of earthquake resistant ductile iron pipe (ERDIP) up to 48” diameter is ongoing and coordinated with surge basin backfill.
- Parallel plate settlers for existing sedimentation basin F were installed. Installation of plate settlers at Basin E scheduled through November.
- Installation of four new raw water pumps commenced at the Tualatin River intake facility (Spring Hill Pump Station) located near the water treatment plant. Installation activities will continue through February, 2019.