Peirce Island Wastewater Facility Upgrade Project
This project is the largest that the City has undertaken. The Peirce Island Wastewater Treatment Facility (WWTF) upgrade expands treatment at the plant to an advanced secondary process which removes organics and nitrogen. Progress videos are available on our YouTube page, shown below.
Public Meetings
Monthly public meetings with City staff, the Contractor and other officials involved in the project are typically held every third Wednesday each month at 11 a.m. in City Hall's Conference Room A or by Zoom Webinar to ensure that citizens are informed. These meetings are available on the City’s YouTube channel, with presentations and meeting minutes available on the Wastewater Public Meetings page.
ANTICIPATED WORK IN MARCH 2021:
Anticipated Construction Traffic Volume: Low
Work will include, but is not limited to:
- Continue minor electrical, plumbing, and HVAC activities in the Solids Building, BAF Building, and Grit Building
- Continue optimization of the BAF process
- Continue architectural work for the new Operations / Lab Building
- Continue plumbing, HVAC and electrical work for the new Operations / Lab Building
PROJECT FACTSHEET
- Start Date: September 2016
- BAF Substantial Completion: December 2019
- Secondary Permit Compliance: April 2020
- Project Substantial Completion: Early 2021 (under review)
- Final Completion: Early 2021 (under review)
- Project Construction Costs:
- Base Contract: $72,785,545.00
- Change Order No. 1: $367,290.42
- Change Order No. 2: $546,722.46
- Change Order No. 3: $ 93,838.31
- Change Order No. 4: $162,869.20
- Change Order No. 5: $249,828.16
- Change Order No. 6: $292,031.11
- Change Order No. 7: $169,138.30
- Change Order No. 8: $112,659.75
- Change Order No. 9: $242,419.68
- Change Order No.10:$122,783.46
- Change Order No.11:$138,938.61
- Total Contract: $75,284,064.46
- Design Engineer: AECOM
- General Contractor: Methuen Construction
- Design Flow: 6.1 MGD average
- New Treatment Processes:
- New Headworks
- Biologically aerated/anoxic filter (BAF) using the Kruger BioSTYR ™ technology for Secondary Treatment and Nitrogen Removal
- Rotary screw presses for solids dewatering
- Simplified Process Flow Schematic
NEWS & UPDATES
- 01/03/20 - Methuen Construction Meets December 31 milestone for substantial complete of new treatment process for Peirce Island WWT Facility
- 11/22/19 - City provides notification that Methuen Construction will not achieve December 1 milestone
- 05/28/19 - Public tour of the Peirce Island Wastewater Treatment Facility on Thursday, June 13th
- 07/25/18 - Public Tour of the Peirce Island Wastewater Treatment Facility on Tuesday, July 24th
- 04/13/18 - Weekend work to continue periodically at Peirce Island Wastewater Treatment Facility
- 02/2/18 - Weekend work to begin at Peirce Island Wastewater Treatment Facility
- 06/28/17 - Overnight Work on Peirce Island Tonight, June 28th
- 06/1/17 - Upcoming Night Work on Peirce Island
- 05/4/17 - Sewer System Field Work Begins May 8, 2017
- 05/4/17 - Construction of Four Tree Island Parking Occurring Before Pool Season
- 04/28/17 - Revised Concrete Haul Route for Peirce Island Wastewater Treatment Facility Work
- 04/17/17 - Peirce Island WWTF Upgrade Quarterly Update to City Council
- Peirce Island Road Bridge Repairs Resumed 2/15/17
- Notification of SSO due to sewer main break 2/3/17
- 1/17/17 Aerial Video of Construction Site and Staging Areas
RECREATIONAL IMPACT ADVISORY
State Fish Pier: No restrictions – Open
Public Boat Launch: No restrictions. Open seasonally.
Four Tree Island Parking Lot: Open.
Four Tree Island : No restrictions - Open.
Off-leash Dog Area: Closed. No dogs allowed on Peirce Island from the bridge.
Peirce Island Outdoor Pool Access: Currently Unrestricted – Open seasonally.
Progress Reports and Public Tour Handouts
Recorded Meetings

02.17.21 Peirce Island Wastewater Treatment Facility Public Meeting
February 17, 2021
01.20.2021 Peirce Island WWTF Public Const Mtg
January 25, 2021
12.16.20 Peirce Island WWTF Construction Meeting
December 22, 2020
09.16.20 Peirce Island Public Meeting
September 16, 2020
Aerial Videos

December 2020 - Peirce Island Aerial Video
January 11, 2021
Peirce Island - November 2020 Aerial Video
November 16, 2020
Peirce Island WWTF Public Construction September, 2020
September 2, 2020