- Location
- Oregon
Willamette Water Supply Water Treatment Plant (WTP_1.0)
The WWSS Commission's new seismically resilient treatment plant in Sherwood is designed for an initial 60 million gallons per day and eventual 120 million gallons per day. Official publications connect design/permitting, historical subcontract procurement and reported construction progress. Sundt is the published CM/GC. The undated project page reports nearly 91 percent complete; commissioning, final acceptance and available remaining packages are unverified.
Last verified Oct 9, 2026 2 official source families
Project brief
What is proposed
The WWSS Commission's new seismically resilient treatment plant in Sherwood is designed for an initial 60 million gallons per day and eventual 120 million gallons per day. Official publications connect design/permitting, historical subcontract procurement and reported construction progress. Sundt is the published CM/GC. The undated project page reports nearly 91 percent complete; commissioning, final acceptance and available remaining packages are unverified.
Latest material change
April 2021 fact sheet reports plant design and permitting underway
Revision U_04142021 describes the same Sherwood/Tonquin treatment plant, initial 60 mgd capacity and future 120 mgd design. This is the document's revision month, not the first public appearance or an approval date. Anticipated 2022 construction and 2026 operations remain historical forecasts.
Commercial scope
Confirmed work and commercial interpretation
What is proposed
The WWSS Commission's new seismically resilient treatment plant in Sherwood is designed for an initial 60 million gallons per day and eventual 120 million gallons per day. Official publications connect design/permitting, historical subcontract procurement and reported construction progress. Sundt is the published CM/GC. The undated project page reports nearly 91 percent complete; commissioning, final acceptance and available remaining packages are unverified.
Potential commercial work
Waterline IQ interpretation of accepted scope. These items are not confirmed contract packages or specifications.
Treatment plant
Water treatment plant and Water treatment filtration
Process and controls
Process piping and valves and Electrical and controls
Civil and site work
Seismic water infrastructure
Permits and approvals
Documented permitting
Permit records have not been captured; requirements and approval remain unverified.
Selected lifecycle
Key official milestones
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Official event
April 2021 fact sheet reports plant design and permitting underway
Revision U_04142021 describes the same Sherwood/Tonquin treatment plant, initial 60 mgd capacity and future 120 mgd design. This is the document's revision month, not the first public appearance or an approval date. Anticipated 2022 construction and 2026 operations remain historical forecasts.
View evidence for April 2021 fact sheet reports plant design and permitting underway -
Official forecast
Historical GMP 1 forecast lists September–November 2021 subcontract bidding
The official CM/GC procurement page anticipated September 27 advertisement and November 4, 2021 responses; GMP 2 separately lists August–September 2023. These elapsed advertised schedules do not establish an active solicitation, received bids, award amount or executed prime contract. SmartBid/confidential package access is outside the collected public evidence.
View evidence for Historical GMP 1 forecast lists September–November 2021 subcontract bidding
Evidence and sources
4 accepted claims across 3 official document versions
Selected official evidence · Inspect exact excerpts and locators
WWSP: water treatment plant
WWSP sitemap-listed program and project publications“Construction is nearly 91 percent complete on the WTP_1.0 Project. At the height of construction, about 300 workers that represent hundreds of local and regional businesses will provide the skills and expertise to complete the work. Dozens of other companie...”
Project Fact Sheet
WWSP official project-library document discovery“Water Treatment Plant Tualatin Valley Water District (TVWD), the City of Hillsboro and the City of Beaverton are developing the Willamette Water Supply System. The new system will draw water from the mid-Willamette River at Wilsonville and, once treated, de...”
WWSP: wtpprocurement
WWSP sitemap-listed program and project publications“GMP 1: Bid advertises Sept. 27, 2021. Bids due Nov. 4, 2021 @ 3 pm (PT). Scopes include erosion control, tree protection, tree removal, earthwork, underground yard piping, temporary electrical, long-lead equipment purchases, structural concrete, structural ...”