Section 23, 24 and 47 Water Mains - Boston and Newton (MWRA Contract 6392)

Section 23, 24 and 47 water mains are part of the Southern High pressure zone. They provide supply to the communities of Boston, Newton and Watertown. The water mains are cast iron and are over 100 years old. Rehabilitation of these water mains will improve water quality by reducing the length of unlined cast iron water mains in the system; improve reliability; restore hydraulic looping and redundancy between Weston Aqueduct Supply Main (WASM) 2 and WASM 4; facilitate conveyance of high service water from Shaft 7 of the City Tunnel to the communities of Boston, Newton and Watertown.

Scope:
This contract includes cleaning and cement mortar lining approximately 4,500 linear feet of Section 23, which is a 36-inch diameter cast iron water main, 10,800 feet of 20-inch Section 24 and Section 47 cast iron water mains, and 500 feet of 20-inch steel water main along Section 24. The construction work will also include installing, by open-cut, 3,600 feet of 36-inch ductile iron Section 23 water main, 6,400 feet of 24-inch ductile iron Section 24 water main, and new valves and appurtenances, and replacing the check valve assembly at Boston Meter 120. Additionally, the construction contract will include replacing approximately 2,400 linear feet of City of Newton 20-inch diameter, 140 year-old cast iron water main on Ward Street between Manet Road and Waverly Avenue.

Schedule:
Work is expected to begin in a couple of months, a more definitive timeline will be provided soon.

Project Updates

August 9, 2022

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Work Update

College Road in Newton: Section 23 (36-inch)
Replace 280-feet
Clean & Line 1,414-feet

Waverly Ave in Newton: Section 24 (20-inch) Closing Access Pits

Ward Street in Newton: Install tapping sleeve for Newton at Ward and Waverly Avenue

June 29, 2022

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Work Update

Crew 1 on Ward Street in Newton to replace Newton’s 20-inch main
Crew 2 cleaning and lining Section 24 (20-inch) at Waverly Avenue, Washington Street and Saint James Circle
Crew 2 also cleaning and lining Section 47 (20-inch) on Commonwealth Avenue and Carriage Road

Access pit for Section 23 (36-inch) and Section 47 (20-inch)

April 28, 2022

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Work Update - Crew 1 on Ward Street in Newton

Temporary water bypass
Replace Newton's 20-inch main
Replace MWRA's Section 23 (36-inch line) & Section 24 (24-inch line)

Work Update - Crew 2 on Beacon Street in Boston

Work to start mid-May
Replace MWRA's Section 23 (36-inch line)

March 31, 2022

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Work Update

Install temporary water bypass
Replace Newton's 20-inch main
Replace MWRA's Section 23 (36-inch line) - Expected to begin in May
Cleaning and lining Sections 23, 24 & 47 - Expected to begin in May

Bypass pumping being set up on Ward Street in Newton

February 3, 2022

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Cleaning and Lining:

Section 23 (36-in): 4,500 lf
Sections 24 & 47 (20-in): 10,800 lf

Pipe Replacement:

Section 23 (36-in): 3,600 lf
Section 24 (24-in): 6,400 lf
City of Newton (20-in): 2,400 lf

February 1, 2022

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