In response to concerns from DEQ that the city of Newberg’s winter flows and total solids may be approaching untenable levels due to population growth the city is looking at adding a third oxidation ditch to the water treatment plant.
This will entail a very major expense since it would require upsizing many parts of the existing waste water plants infrastructure including addition capacity for clarifiers and solids handling. RFP work is occurring right now, but the cost is likely to be in the region of $31M to $33M. A wastewater capacity study was completed in 2025 with final findings provided to the City Council in April of 2026 to assess the need for this upgrade.
There are documents below related to this project its history and for full transparency documents connected to the request for proposal (RFP) to obtain proposals to carry out this critical task. This needed upgrade will see the city through to the 2040s for its waste water processing needs.
RFP Introduction
The City of Newberg (City) is seeking proposals from qualified and experienced firms for engineering design services related to the expansion and repair of certain components of the City’s wastewater treatment plant (the “Project”). The City will screen and select Proposers as provided in ORS 279C.110(5). The City intends to award a single contract as a result of this RFP. The City’s expectation of the firm that the City contracts with is that the firm’s values align with the City’s values of highly ethical conduct, fiscal responsibility, and respect for the City and others.
The city envisages a contract term of three years with options to renew for up to two additional one-year terms.
The RFP is available electronically through Euna OpenBids (DemandStar) at:
https://www.newbergoregon.gov/business/bids___rfps.php
Any solicitation addenda, will be posted to Euna OpenBids (DemandStar). This RFP may also be viewed at Newberg City Hall, 414 E. First Street Newberg, OR 97132. Any Q & A, files or transcripts generated by the proposal will be posted on this page.
Proposers are requested to visit this page frequently as well as to look for updates on Euna OpenBids (DemandStar). If Q & A responses are posted on this city web site OR addendums are posted to Euna OpenBids (DemandStar) an email alert will be sent to all Proposers. To simplify this process we have established an email account specifically for this procurement, see information to follow:
Procurement Contact: Will Worthey (City Manager)
Email: WWTPRFP@protonmail.com Phone: (971) 281-9350
Key Dates (see RFP documentation for more details)
|
ACTIVITY |
DATE |
|
City Council Motion to Proceed |
4/20/2026 |
|
Issuance of Request for Proposal |
4/27/2026 |
|
Deadline for Questions / Clarifications / RFP Protests |
5/18/2026 |
|
Deadline for Addenda |
5/25/2026 |
|
Deadline to Withdraw from RFP Process |
6/1/2026 |
|
Deadline for Submission of Proposal |
6/1/2026 |
|
Initial Evaluation of Proposal – Scoring Phase 1 (14 days for scoring) |
6/15/2026
|
|
Announcement of the Final Three Proposers |
6/16/2026 |
|
Phase 2 Deadline for Submission of Pricing Proposal (for final three Proposers) |
6/29/2026
|
|
Final Scoring |
7/6/2026 |
|
Notice of Intent to Award |
7/13/2026 |
|
Deadline for Filing Protest of Award |
7/20/2026 |
|
Council Approval |
8/3/2026 |
|
Anticipated Notice to Proceed |
8/4/2026 |
|
Contract Kickoff |
9/3/2026 |
Documents Connected to the Oxidation Ditch and Capacity Study
Here a list of downloadable documents connected to the Wastewater Treatment Plant (WWTP) and recent studies to discover its capacity status and future needs.
The recent capacity study from February of 2026 that points to the need for major upgrades to our WWTP system can be downloaded from here.
Here are as built documents for download as examples of our current secondary clarifier and oxidation ditch installations:
Oxidation ditch
Secondary clarifier
RFP and RFP Questions and Answers
Items connected to the upcoming RFP will be posted below:
| QUESTION | ANSWER OR COMMENT |
| Data will be posted here | |
| QUESTION | ANSWER OR COMMENT |
| Data will be posted here | |
| QUESTION | ANSWER OR COMMENT |
| Data will be posted here | |
| QUESTION | ANSWER OR COMMENT |
| Data will be posted here |
