Back Cove West Storage Conduit

The project is under construction by Sargent Corporation from Stillwater, ME. Construction will continue throughout 2021, 2022 and 2023.

Construction Update: October 27, 2021

Sargent has finished installing the 60 inch storage pipe within Baxter Boulevard and now they have transitioned to 48 inch towards Dartmouth Street. They will continue installing this pipe into Dartmouth St.  Starting November 1, work will begin on the Dartmouth Street outfalls.  Associated with this outfall work, Baxter Boulevard at Dartmouth Street, will be closed for 3 weeks. The press relesease can be found here:  https://portlandmaine.gov/CivicAlerts.aspx?AID=6087

Sargent also continues to install sheet piling and bracing near the Baxter Boulevard pump station.  This support system is in order to install the 1800 linear feet of 20 foot x 8 foot box conduit.  They have installed 6 sections of the box conduit so far and will contine installing box conduits for the next year.

Work at the Vannah Street diversion chamber also started this week. The Back Cove Trail has been diverted around the work area. Trail diversions will continue throught the project as the contractor works on the outfalls into Back Cove. 

Gantry Crane

BCWSC 2021-10-22 Gantry Crane

60" Pipe Install

BCWSC 2021-10-22 60inch Pipe Install

Clay Subgrade

BCWSC 2021-10-21 Clay Subgrade

Looking North at the Box Conduit

BCWSC 2021-10-20 Looking North at the Box Conduit

Back Cove Trail

BCWSC 2021-10-27 Back Cove Trail

Looking into the Box Conduit

BCWSC 2021-10-19 Looking North into the Box Conduit

Installed Box Conduits

BCWSC 2021-10-18 Installed Box Conduits

Box Conduit Delivery

BCWSC 2021-10-20 Box Conduit Delivery

Construction Update: October 4, 2021

Sargent continues to install 60 inch pipe within Baxter Boulevard and now the pipe has crossed Vannah Avenue.  They will continue installing the pipe all the way to Dartmouth Street. Blasting has concluded for the time being and will return to the site sometime in December.  Sargent also continues to install sheet piling and bracing near the Baxter Boulevard pump station.  This support system is in order to install the 1800 linear feet of 20 foot x 8 foot box conduit.  Superior Concrete has produced the first section of box conduit at their facility. The boxes will be delivered to the site this week. 

Custom Built Excavator

BCWSC 2021-10-01_Excavator

Installation of 60" Pipe

BCWSC 2021-09-16 12.21.02 60in Pipe Installation

Sheet Pile Bracing

BCWSC 2021-09-17 10.32.51 Sheet Pile Bracing

Flow Control Manhole

BCWSC 2021-09-17 10.28.29 Flow Control Manhole

Construction Update: September 10, 2021

Sargent continues to install 60 inch pipe within Baxter Boulevard towards Vannah Avenue.  They also have been installing sheet piling and bracing near the Baxter Boulevard pump station in order to install the large diameter structures.  These sheet piles go 30 feet deep.

Baxter Boulevard from Vannah to Dartmouth Street was also closed on 9/7/21. This was so that the contractor can remove the pavement surface and continue with blasting before the 60 inch pipe crew gets to Vannah Avenue.

BCWSC 2021-09-02_Installing Shoring
BCWSC 2021-09-02_Bracing Bay 1

Construction Full Schedule

BCWSC - Project Schedule - 08-20-21

Construction Update: August 23, 2021

**MAJOR TRAFFIC ALERT** Baxter Boulevard Traffic Impacts

Sargent will be closing more of Baxter Boulevard, from Payson Park to Dartmouth Street.  This closure will begin 9/7/2021 and last until December 2022.

See below for a map of the closure as well as for more information about the project. 

BCWSC Sargent 2021-09-07 Traffic Control Plan Phase 2 Opens in new window


Construction Update: August 20, 2021

Sargent's sub-contractor, Capital Rock, continues to blast ledge daily.  Sargent's construction crew has started to install 60" plastic storage pipe within this blasted ledge. They have also started to install sheet piles to support the trench work for the new storage box conduit.  

BCWSC 2021-08-26 60 inch Pipe Trench

Construction Update: June 16, 2021

**MAJOR TRAFFIC ALERT** Baxter Boulevard Traffic Impacts Begin June 24

Sargent will be closing Baxter Boulevard from Payson Park to Vannah Avenue. This first phase of closure is scheduled to last for the next three months. 

See below for a map of the closure as well as for more information about the project. 

BCWSC Sargent 2021-05-06 Traffic Control Plan Phase 1

Construction Update: May 26, 2021

Sargent has started to mobilize to the worksite with the installation of office trailers and pipe materials. A security fence has also been installed along Back Cove trail to limit people, bicycles and vehicles from accessing the worksite. Access points to the trail have been provided at Dartmouth St, Vannah Ave, Cross walk at Baxter and Chenery and at Payson Park. 

Construction is scheduled to start end of June or early July. Once construction starts Baxter Boulevard will be closed to traffic, bicycles, and pedestrians.

Sargent Corporation was the low bidder with a bid of $27,272,257.00

The Notice of Award was issued on December 28, 2020 and signed on December 29, 2020.

City of Portland's Planning Authority has approved a Level 1 Site Alteration Permit on December 30, 2020. 

Maine DEP has issued a Finding of No Significant Impact for the Back Cove West Storage Conduit Project.  The report has been posted below under Press Releases. 

On March 4, 2020 the City of Portland had a neighborhood meeting on this project.  The presentation given at the meeting can be found under Press Releases.

A set of construction plans can be viewed: HERE

PRESS RELEASES

Date Notice Additional Documents
02/19/2020 Neighborhood Meeting Notice Meeting Notice
03/04/2020 Neighborhood Meeting Presentation Presentation
04/07/2020 Maine DEP - Finding of No Significant Impact FONSI
BCWSC 2021-08-26 Public Information Sign

WHAT’S HAPPENING                  

  • 2.25 Million Gallon Underground Storage Conduit.
  • New 1,690 foot long 20 foot x 8 foot box conduit will be installed in Baxter Boulevard to capture Combined Sewer Overflows before they reach back Cove.
  • 2,133 feet of 60" round pipe to be used for storage.
  • 8 existing CSO’s will be consolidated into 2 remaining CSO’s.
  • New sewer, storm drains and water lines will be installed in Dartmouth Street from Baxter Boulevard to Forest Avenue.
  • Streets within work area will be reconstructed, new pavement installed.
  • Multiple storm drain outfalls will be replaced along Baxter Boulevard.
  • Multiple long street closures will occur throughout the project.
  • New traffic signal at Vannah Ave and Baxter Blvd.

WHAT TO EXPECT DURING THE PROJECT

  • Noise
  • Large equipment and machines moving through the area creating vibrations
  • Traffic disruptions, backups, moving work-zone, slower traffic
  • Streets will be closed
  • Temporary disruptions to driveways, water, sewer lines (contractor must provide notification)
  • Temporary water lines will be installed running across yards and connecting to houses
  • Dust - contractor required to control dust but it will still get dusty at times
  • Professional interactions with contractor (contact one of the people listed below, if this doesn’t happen)

SEQUENCING OF PROJECT

  1. Start of construction July 2021 and continue through 2022.
  2. Project will start by closing Baxter Boulevard from Payson Park to Vannah Avenue.
  3. Once the work progresses towards Vannah Avenue Baxter Boulevard will be closed from Payson Park to Dartmouth Street from September 2021 to December 2022.
  4. A 20 foot x 8 foot concrete box conduit will be installed from Cheverus Track to Mackworth St.
  5. 60" storage pipe will be installed from Mackworth St to Dartmouth Street.
  6. Base paving first of December 2022.
  7. Once this section is complete Dartmouth St will be closed from Forest Ave to Baxter Boulevard in March of 2023 to November 2023.
  8. New sewer, storm and water will be installed in Dartmouth Street.                             
  9. Spring 2024 Surface Paving and stripping of the streets.

WHO TO CONTACT WITH QUESTIONS/ISSUES

  • Project Engineer, Portland Department of Public Works: Nathaniel Smith at (207) 874-8818, nhs@portlandmaine.gov
Aerial Location Map of the Project