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The original item was published from 1/13/2022 10:54:14 AM to 1/13/2022 11:23:55 AM.

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Water Resources

Posted on: January 13, 2022

[ARCHIVED] Construction Update on Back Cove West Storage Conduit

The work to reduce overflows is part of the City’s agreement with the U.S. EPA to not only reduce, but ultimately eliminate, the flow of combined waste being discharged into our water.  A combined sewer system transports wastewater from homes, industries and businesses, as well as storm water collected from streets, parking lots, roofs and yards to the East End Wastewater Treatment Plant.  A combined sewer overflow occurs when the combined sewer capacity is overwhelmed during heavy rain and a mix of sewer and storm water is then discharged into Back Cove.

The work includes the installation of a 2.25-million-gallon storage conduit.  The project also involves new diversion structures, local sewers and storm drain improvements.  In addition to the installation of drainage outfalls that discharge into Back Cove, there is ongoing work with water main replacement on Dartmouth Street and utility work at the intersection of Forest Avenue and Dartmouth Street.

As of this update, the 60-inch sewer pipe installation has been completed and around 250 feet of the conduit has been installed.  The contractor continues to work on installing drainage within the completed pipe sections and once all of the utilities are in place, the road will be rebuilt and paved.  The section of Baxter Boulevard from Dartmouth Street to Vannah Avenue is scheduled to reopen to vehicle traffic in June of 2022.  The section of the Boulevard that spans from Vannah Avenue to Payson Park will remain closed until June of 2023.  Sargent’s subcontractors continue to blast ledges within the area as well as installing sheet piling for the new box conduits.  The blasting contractor is on George St currently, heading towards Vannah Ave. 

The Portland Water District is also completing a significant update to their sewer pump station which is nearby on the Boulevard.  Due to this, large external pumps and pipeline will divert the flow of sewage around the station to a manhole located on the Back Cove walking path.  This temporary solution will remain active for the next 4-6 months.  Questions regarding this can be directed to the Portland Water District’s Project Manager, Helen Newman, at 207-523-5279.

If you have specific questions or concerns, please contact Nathaniel Smith, Project Engineer at 207-874-8818 or nhs@portlandmaine.gov

Full project schedule
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