City of Newberg Seeks Engineering Firms for Major Wastewater Treatment Plant Upgrade
The City of Newberg has issued a Request for Proposals (RFP) for engineering design services to expand and upgrade its wastewater treatment plant — a project driven by population growth and concerns raised by the Oregon Department of Environmental Quality (DEQ) about the city's winter flows and total solids levels approaching capacity limits.
The proposed upgrade would add a third oxidation ditch to the existing facility, along with expanded clarifiers and improved solids handling infrastructure. A wastewater capacity study completed in 2025 and presented to City Council in April 2026 confirmed the need for the investment, which is estimated to cost between $31 million and $33 million. When complete, the upgraded plant is expected to serve Newberg's wastewater processing needs through the 2040s.
City Council approved moving forward with the RFP process on April 20, 2026. Proposals are due by June 1, 2026, with contract award anticipated in early August and a contract kickoff scheduled for September 3, 2026.
The full RFP is available through Euna OpenBids (DemandStar) at newbergoregon.gov/business/bids___rfps.php and may also be viewed in person at Newberg City Hall, 414 E. First Street. Interested firms should monitor both the city's website and Euna OpenBids for any addenda or Q&A postings.
All questions, clarifications, and RFP protests must be submitted by May 18, 2026, directly to the project's dedicated procurement email: WWTPRFP@protonmail.com. This is the only channel for proposal-related inquiries. Do not contact city departments directly regarding this RFP.
For a full list of key dates and access to related project documents, including the capacity study and as-built plans for the current oxidation ditch and secondary clarifier, visit the Oxidation Ditch and Wastewater Plant Upgrade page under Engineering.
