Transcript Welcome to the The CSO Program Update Frederick A. Laskey Executive Director
Welcome to the
EBC Breakfast Meeting
The CSO Program Update
Frederick A. Laskey Executive Director Massachusetts Water Resources Authority
Massachusetts Water Resources Authority
Presentation to the
Environmental Business Council of New England
CSO Program Update
Frederick A. Laskey Executive Director
May 18, 2006
On April 27, 2006, Judge Stearns the Long-Term CSO Plan
“With this agreement in place, we are taking a giant step towards . . . a model of environmental remediation.”
- U.S. District Court Judge Richard G. Stearns
The CSO Problem: 1985
• 84 combined sewer overflows • Thousands of discharges per year • Over 3 billion gallons of untreated discharges
CSO Control Plan - Progress to Date
• 23 of 29 projects completed or in construction • 21 CSO outfalls closed • Dry weather overflows eliminated • Constitution Beach and Neponset River CSOs eliminated • Annual CSO volume reduced by 2.5 billion gallons (76% reduction) • More than 60% of remaining overflows receive treatment • $340 million spent to date • Dramatic improvement in receiving water quality
Dramatic Improvements In Bacterial Water Quality: Wet Weather 1987-1998 (Before Secondary Treatment and South System transfer) 1999 - 2005 (After Secondary Treatment and New Outfall) 1987 - 1991 1999 - 2005
Average
Enterococcus
counts in Boston Harbor in wet weather
The lighter the blue, the better
Deer Island Pumping Capacity Has Doubled Since 1985
1,400 1,200 1,000 800 600 400 200 0 South System MGD North System MGD
MWRA’s CSO Projects
23 Projects Have Been Completed Or Are In Construction Completed Projects
Hydraulic Relief at CAM005 Hydraulic Relief at BOS017 Chelsea Trunk Sewer Replacement Chelsea Branch Sewer Relief CHE008 Floatables Control and Outfall Repair Cottage Farm CSO Facility Upgrade Prison Point CSO Facility Upgrade Somerville Marginal CSO Facility Upgrade Commercial Point CSO Facility Upgrade Fox Point CSO Facility Upgrade MWRA Floatables/Outfall Closing Projects
In Construction
Pleasure Bay Drainage Improvements (87% complete) Union Park Treatment Facility (90% complete) Charlestown BOS019 Storage Conduit (33% complete) East Boston Branch Sewer Relief (10% complete by Contract 1) South Dorchester Bay Sewer Separation (88% complete) Stony Brook Sewer Separation (87% complete) Neponset River Sewer Separation Constitution Beach Sewer Separation Somerville Baffle Manhole Separation Fort Point Channel Sewer Separation (10% complete)
In Design
Cambridge/Alewife Brook Sewer Separation (25%) Regionwide Floatables Control (75% complete) North Dorchester Bay CSO Tunnel and Facilities Morrissey Boulevard Storm Drain
In Design Procurement
E. Boston Branch Sewer Relief (Contracts 2 and 3 only) Reserved Channel Sewer Separation
7 CSO Projects Still To Come
• Three projects are in design: – North Dorchester Bay Storage Tunnel – Reserved Channel Sewer Separation – Morrissey Boulevard Storm Drain • New projects: – Bulfinch Triangle Sewer Separation – Brookline Sewer Separation – Cottage Farm Inflow Controls – Interceptor Gate Controls
CSO BOS019 Storage Conduit, Charlestown
Stony Brook Sewer Separation
Stony Brook Sewer Separation
South Dorchester Bay Sewer Separation
South Dorchester Bay Sewer Separation
CSO Facilities
• Commercial Point • Fox Point
Union Park CSO Facility
Fort Point Channel Sewer Separation
East Boston Branch Sewer Relief
Alewife Brook CSO Control: CAM002-004 Sewer Separation
Pleasure Bay Storm Drain Improvements
North Dorchester Bay/Reserved Channel: 17-Foot Soft Ground Tunnel
076 078 079 080 Columbus Park Headworks 085 084 083 086 087 082 081 17-foot, soft ground storage tunnel with pump-out at Conley Terminal Virtual elimination of CSOs to North Dorchester Bay
North Dorchester Bay/Reserved Channel: Dewatering and Odor Control
076 078 079 080 10-mgd Pump Station Columbus Park Headworks 085 084 083 086 087 Odor Control Facility 082 081 Dewatering pump station at Conley Terminal Odor control facility at State Police Building
North Dorchester Bay/Reserved Channel: Enlarged Morrissey Boulevard Storm Drain
076 078 079 080 10-mgd Pump Station Columbus Park Headworks 085 084 083 086 087 Odor Control Facility Enlarged Storm Drain 082 081 Stormwater Gates In storms larger than a one-year storm BOS087 stormwater redirected to enlarged Morrissey Blvd. storm drain and discharged to South Dorchester Bay 5-year level of stormwater control for North Dorchester Bay
North Dorchester Bay/Reserved Channel: Reserved Channel Sewer Separation
076 078 079 080 10-mgd Pump Station Columbus Park Headworks 085 084 083 086 087 Odor Control Facility Enlarged Storm Drain 082 081 Stormwater Gates Separate ~ 355-acre area between Reserved Channel and East 4 th Street Reduce frequency of CSO discharges from 37 to 3 in a typical year Reduce CSO discharge volume from 41 mg to 1.4 mg in a typical year
Reductions in Overflows at South Boston Beaches in a Typical Year
150 125 100 75 50 25 0 125 100 75 50 25 0 80 105 Number of Activations 105 1988 21 2004 CSO Stormwater 144 Volume (millions gallons) 144 14 1988 9 2004 CSO Stormwater 0 2015 0 0 2015 0
Charles River: A National Model For CSO Control
• The MWRA has already achieved significant reduction of CSO related impacts to the Charles River: – Sewer separation and hydraulic relief projects have dramatically reduced combined sewer overflows – Much more flow is sent to MWRA’s new Deer Island Treatment Plant – Upgrades to Cottage Farm and Prison Point facilities have improved disinfection
Charles River Report Card: B+ for 2005
Charles River: System Optimization
Charles River: Bullfinch Triangle Sewer Separation
Charles River: Brookline Sewer Separation
Reductions in Overflows From Cottage Farm in a Typical Year
20 15 10 5 0 18 Number of Activations 16 1988 2004 1600 1200 800 400 0 1547 Volume (million gallons) 1988 117 2004 2 2015 6.5
2015
Reductions in Overflows to Charles River
MWRA’s Capital Improvement Program 1986 - 2016
$700 Boston Harbor Project $600 $500 Wastewater Interception & Pumping, and Facilities Improvements $400 $300 $200 $100 MetroWest Tunnel
Actual
Drinking Water Quality Improvements
Projected
Other Waterworks Waterworks Distribution & Pumping Combined Sewer Overflows Business and Operations Support $0 FY86 FY88 FY90 FY92 FY94 FY96 FY98 FY00 FY02 FY04 FY06 FY08 FY10 FY12 FY14 FY16
Annual CSO Volume Has Been Reduced Dramatically
• Annual CSO volumes have already been reduced by 2.5 billion gallons • By 2015, 95% of the remaining CSO flows will be treated 3.5
3 1 0.5
0 2.5
2 1.5
1988 1992 Untreated 2002 Treated 2015
On April 27, 2006, Judge Stearns the Long-Term CSO Plan
“I believe that this is one of the most successful modern public works projects ever undertaken.”
- U.S. District Court Judge Richard G. Stearns