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 from Apr. 2025

Upcoming Work

The City of Wilsonville will be performing work on the valves and piping associated with the water storage reservoirs on Elligsen Rd., adjacent to the Wilsonville Summit Apartments ( just east of the Canyon Creek Rd. intersection). Work is expected to begin on October 27 (subject to change) and continue for up to 3 days. 

Work will take place between 7 am and 5 pm. During these hours, there will be occasional noise resulting from excavation and sawcutting activities. Construction equipment will be entering and leaving through the secure gate between the apartment complex and the reservoir site. Vehicle parking and access to the apartment complex will not be affected. Any additional updates will be noted here as scheduled.

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 Road.

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
• Fall 2025 – Construction Completed