Peirce Island Wastewater Facility Upgrade Project

For information about the dedication event, click here.

• Start Date: September 2016
• BAF Substantial Completion: December 2019
• Secondary Permit Compliance: April 2020
• Project Substantial Completion: July 2021
• Final Completion:  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
  • Change Order No.12 $834,356.28
  • Total Contract:      $76,118,420.74
• 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

• 07/13/21 - Dedication Ceremony
• 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

State Fish Pier: No restrictions – Open

Public Boat Launch: No restrictions. Open seasonally.

Four Tree Island Parking Lot: Open. 

Four Tree Island : Vehicular access restricted past outdoor pool - Open.

Off-leash Dog Area: Open but road restricted at outdoor pool on weekdays due to construction. Stick to trails and avoid fenced areas.

Peirce Island Outdoor Pool Access: Currently Unrestricted – Open seasonally.