Westside Reservoir

This project constructs a 3 million gallon storage reservoir near the intersection of SW Tooze Road and SW Baker Road, and installs about 3,000 linear feet of new 24-inch water transmission line on SW Tooze Road, extending from the reservoir to the intersection at SW Grahams Ferry Road.

Photo depicts the site before construction 

Upcoming Tooze Road Closure: Jan. 9-10

12/10/24: On Jan. 9-10, another complete two-day road closure is required to install transmission line. The roadway will be closed to thru traffic at 7 am on Thursday, Jan. 9, to be re-opened by 5 pm on Friday, Jan. 10. Only emergency vehicles and local access are permitted during the closure. 

After the roadway is re-opened to thru traffic, pipe installation is to continue along Tooze Rd., making significant delays possible. The roadway will continue to be reduced to one lane during weekday work hours, with flaggers directing vehicle traffic in both directions. Work to complete the transmission line is expected to be completed by Feb. 2025, after which the impacted roadway will be re-paved and striped.

10/18/24: On Nov. 4-5, a complete two-day road closure is required to install transmission line at Tooze Rd., east of Baker Rd. Pending Clackamas County approval, the roadway will be closed to thru traffic at 7 am on Monday, Nov. 4, to be re-opened by 5 pm on Tuesday (Nov. 5). Only emergency vehicles are permitted during the closure. 

Project Overview

The City of Wilsonville is constructing a new seismically resilient reservoir and transmission line to increase overall water storage capacity to support growth and provide an additional water supply in the event of an emergency. The project supplements four existing water storage tanks currently in operation.

The reservoir is being constructed on City-owned property on SW Tooze Road in unincorporated Clackamas County.  The water transmission line connects the new reservoir to the community’s existing water system.

• New 3-million-gallon water storage reservoir
• Built to modern seismic and operational standards
• Stormwater management
• Associate electrical and communications
• Access driveway
• Landscaping and screening
• 3,000 linear feet of 24-inch water transmission line

For additional information, see our FAQ. 

Key Benefits

• Increases water storage and delivery capacity to support growth
• Provides additional water for everyday use and emergencies
• Provides seismic resilience in the event of an earthquake
• Reduces time and cost to build by using existing City-owned site
• Offers space for future water system improvements 

Project Area

The City-owned property is in unincorporated Washington County on Tooze Rd.

Schedule

This project is in information gathering stages, and subject to change as data is gathered. The preliminary schedule milestones for the sequence of project phases:

• Spring/Summer 2023 – Preliminary Analysis, Investigations and Design
  • Preliminary Design - July
• Winter 2024 – Permitting
• Spring 2024 – Design Completed
• Summer 2024 – Land Use Permitting
• Summer 2024 – Construction Begins
• Winter 2025 – Construction Completed