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Massachusetts Water Resources Authority
For Immediate Release
DATE:
September 7, 2007
CONTACT: Ria Convery, Communications Director
(617) 788-1105, <ria.convery@mwra.state.ma.us>

 

MWRA RECENTLY COMPLETED CSO CONTROL PROJECTS (2006-2007)
Total volume of CSO discharges reduced by 226.7 Million Gallons

STONY BROOK SEWER SEPARATION (CHARLES RIVER)
stony brook map

Removed stormwater runoff from neighborhood and MWRA sewers by installing 74,000 feet of new storm drains serving 609 acres in Jamaica Plain, Mission Hill and Roxbury. Completed: Sept. 2006. Cost: $45,056,000.
Total Reduction of CSO Volume: 99.7%
Frequency of discharges
Before project
22 times per year
After project
2 times per year
Volume of discharges
Before project 44.5 million gallons/year
After project
0.13 million gallons/year

SOUTH DORCHESTER BAY SEWER SEPARATION

south dorchester bay map

Removed stormwater runoff from neighborhood and MWRA sewers by installing 136,000 feet (over 25 miles) of new storm drains serving 1,750 acres of Dorchester from Dorchester Bay to Washington St. and from Columbia Rd. to as far south as the Neponset River. Completed: Dec., 2006. Cost: $118,229,000.
Total Reduction of CSO Volume: 100%
Frequency of discharges
Before project
20 times per year
After project
All discharges eliminated
Volume of discharges
Before project 30 million gallons/year
After project
All discharges eliminated

FORT POINT CHANNEL SEWER SEPARATION

fort point channel map

Removed stormwater runoff from neighborhood and MWRA sewers by installing 4,550 feet of new storm drains serving 55 acres in the Fort Point Channel area. Completed: March 2007. Cost: $7,675,000.
Total Reduction of CSO Volume: 100%
Frequency of discharges
Before project
9 times per year
After project
0 times per year
Volume of discharges
Before project 3.0 million gallons/year
After project
0.0 gallons/year

PRISON POINT FACILITY OPTIMIZATION

prison point photo

Minimizes treated CSO discharges to the Inner Harbor by optimizing the operation of existing facility gates and pumps to maximize in-system storage and convey more flow to Deer Island. Completed: March, 2007. Cost: $50,000.
Total Reduction of CSO Volume: 25.4%
Frequency of discharges
Before project
30 times per year
After project
17 times per year
Volume of discharges
Before project 335 million gallons/year (treated)
After project
250 million gallons/year (treated)
BOS019 CSO STORAGE CONDUIT- (LITTLE MYSTIC CHANNEL)
bos019 photo

Construction of new facility to provide 670,000 gallons of off-line storage in double barrel 10’x17’ conduits installed between Chelsea St. and the Mystic Tobin Bridge, Charlestown. Completed: March 2007. Cost: $14,283,000
Total Reduction of CSO Volume: 86.4%
Frequency of discharges
Before project
13 times per year
After project
2 times per year
Volume of discharges
Before project 4.4 million gallons/year
After project
0.6 million gallons/year

UNION PARK DETENTION/TREATMENT FACILITY - (FORT POINT CHANNEL)

union park photo

Construction of new facility, adjacent to existing BWSC pump station, to provide 2.2 million gallons of storage, and treatment of remaining discharges. Completed: April, 2007. Cost: $49,546,000.
Total Reduction of CSO Volume: 45.9%
(100% treated)
Frequency of discharges
Before project
25 times per year (untreated)
After project
17 times per year (treated)
Volume of discharges
Before project 132.0 million gallons/year (untreated)
After project
71.4 million gallons/year (treated)

 

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