Construction - Water Mains

Water Main Replacement Program

The Portland Water District has been serving Greater Portland communities with Sebago Lake water for more than 100 years and upgrading and maintaining the system since 1908. The Portland Water District invests roughly $7 million a year in water main renewals. Since 1985, reported leaks have been reduced due to the effectiveness of this program, even with the continued aging of existing water mains.

The District’s goal with the Water Main Replacement Program is to provide a reliable distribution system designed and maintained to enhance public health and safety.  Water main replacement involves replacing existing water mains with new ones to improve water flow characteristics and to improve service to our customers.  Mains are identified for replacement according to numerous criteria, including:

  • Partnering opportunities with municipal and MDOT road reconstruction and combined sewer overflow (CSO) projects
  • Opportunities to improve water quality or address water quality concerns 
  • Leak frequency
  • Aging infrastructure and/or outdated water main material
  • Critical loop feeds (eliminating dead ends based on flow characteristics)

Main replacement projects are typically scheduled for construction between April and November.


This page was last updated 11/02/2020.


(click on map for larger view)


Gray Road (Route 100 project)

Contractor: Shaw Brothers

In conjunction with the Town of Falmouth and MDOT the District is replacing approximately 2000 feet older failing water mains – 1200 feet of 1929 pipe on Leighton Road from Gray Road to Turnpike and 800 feet of 1978 DI pipe on Gray Road from Leighton to TD Bank Entrance.


Schedule: Completed



College Ave

Contractor: (currently under design)

In conjunction with the Town of Gorham road rehabilitation project the District is replacing and upsizing an old (1895) 6”CI pipe with a new 12” DI to improve fire protection to the area. The project will extend from School Street to Flaggy Meadow Road (1600-ft) and a new 12” DI will replace to 2” Galvanize pipe on Academy Street (425-ft).


Schedule: Bid in Nov – construction to start in April 2021 - July 2021

Mosher Road

Contractor:  Wyman and Simpson 

In conjunction with the MDOT replacing the bridge the District is replacing 500-ft of 12” water main and 500-ft  8” sewer force main

Schedule: Completed

Preble St. (Somerset to Congress) completed 2019

Somerset St. (Elm to Forest)  

Contractor: Sargent Corporation

In conjunction with the City of Portland Combined Sewer Overflow (CSO) sewer separation project on Preble Street (3000-ft) and Somerset Street (1500-ft), PWD will replace 4500’ of old 1889-1927 cast iron water main. 

Schedule: Completed

Brighton – Deering - Falmouth Roundabout Project

Contractor: Shaw Brothers Construction, Inc.

In conjunction with the City of Portland construction of the roundabout at the intersection of Brighton Avenue, Deering Avenue and Falmouth Street the PWD will be replacing 1,950 feet of 1902 – 1912 vintage cast iron pipe.

Schedule: Completed


Warren Ave - Turnpike Crossing

Contractor: D&C Construction

In conjunction with the City of Portland’s storm water project the District will be installing 1700 ft. of 20” water main to replace a 1954 Turnpike Crossing. 

Schedule: Completed

Walton Street (Canco Road to Ocean Avenue), Mackworth Street (Ocean Avenue to Clifton Street), Ocean Avenue (Irving Street to Walton Street), Mayland Street (#45 to Irving Street) and Sawyer Street (Ocean Avenue to Irving Street)

Contractor: Gorham Sand & Gravel, Inc.

In conjunction with the City of Portland CSO storm separation project. The District will be replacing 5,300 ft. of old cast iron water main (1886-1934).

Schedule: May 2020 -  October 2021 - 20% completed

Veranda Street Wordsworth to Martin Pt. 1928

Contractor: Bid May

In conjunction with the MDOT Bridge replacement project the District will be replacing 1700 feet of 1928 -12” cast iron pipe on Veranda from Wordsworth St. to Martin Pt.

Schedule: Bid in November

Newbury Street - Hancock to Mountfort

Contractor: Gorham Sand & Gravel, Inc.

The District will be replacing an 8” 1913 cast iron pipe on Newbury Street from Hancock Street to Mountfort Street.

Schedule: Completed


Highland Avenue - Dresser Road to Crestview Drive (southerly intersection)

Contractor: DLM Property Care, LLC

The District is replacing a 6”cast iron undersized 1904 water main with new 12” water main from Dresser Road  to Crestwood Drive (southerly intersection), 1,900 feet. This work is being done prior to the City of South Portland paving the section of Highland in 2021.



Schedule: Completed

E Street - Waterman Drive toward Ocean Street - 400 feet

Contractor: Peters Construction, Inc.

The District is replacing 400 ft. of failed (7 leaks) 8”- 1965 cast iron pipe.

Schedule: Completed

Turnpike Crossing – Maine Mall

Cummings Road – Petco, Scarborough

Contractor: Sargent Corporation

In conjunction with the Maine Turnpike Authority widening project the District will be replacing  two water main crossings of the Turnpike. A 16”- 1949 concrete pipe at Cummings Road and a 30”- 1949 concrete transmission main at near the Maine Mall. The 2900 ft. of pipe will be replaced with a combination of High Density Polyethylene Pipe (HDPE) and ductile iron.

Schedule: Completed

Oak Hill Standish Development – Oak Hill Rd., Oak Ridge Drive to entrance of new development 

Contractor: Leavitt Construction

As a requirement of a development build-out the District is requiring replacement of an 8”- 1951 cast iron pipe with a new 12” pipe to support the new development.  

Schedule: Completed


Westbrook Common & Brackett Street - Main Street to Cross Street

Contractor: TBD

In conjunction with the City of Westbrook rehabilitation of the Westbrook Common, replacement of 600 ft. of 1889 – 12” cast iron pipe.

Schedule: TBD


Depot Street (Main Street to River Road) and Main Street (Bridge to Depot Street): 407 Zone Connector

Schedule: 2021/2022

In conjunction with the Town of Windham the District will replace 8” water main pipe on Main Street with a new 24” pipe and 8” cast iron water main originally installed in 1913 with a new 16” water main pipe. The new water mains will serve as a transmission main connecting the two 407 pressure zones. This new pipe will connect to the existing water main at the Main Street bridge and connect to the existing water main along River Road. Approximately 2,700 feet of new water main will be installed.

Contractor: Bid in Nov. construction to start April 2021 - Nov 2021

If you would like more information on these or other water main renewal projects please contact the Asset Management and Planning Group at (207) 774-5961 ext. 3043.