Massachusetts Water Resources Authority

Transcription

1 Massachusetts Water Resources Authority Upper Neponset Valley Replacement Sewer Project Information

2 Purpose of Project To bring capacity of the 100+ year old sewers up to the level of service the MWRA provides to all member sewer communities.

3 Existing Upper Neponset Valley Sewers

4 Tributary Areas

5 Proposed Sewers

6 MEPA Process Executive Office of Environmental Affairs (EOEA) Environmental Impact Review (EIR) Process begun in 1999 Certificate obtained in 2003 Directed to avoid or minimize impact to trees Concerns voiced to minimize impacts to traffic and avoid detours through residential streets

7 The MWRA should pay particular attention to avoiding or minimizing impacts on mature shade trees and traffic flow along the VFW Parkway during construction Executive Office of Environmental Affairs October 15, 1999

8 Boston Redevelopment Authority September 28, 1999 Every effort must be made to protect and preserve the trees along the Parkway and to prevent damage to these significant arboreal resources and their root systems. Secondly, since the VFW Parkway is a major heavily traveled arterial, we would recommend that, to the extent possible, construction work and lane closures be limited to non-peak traffic hours to reduce disruption and potential congestion. Any detours, especially through residential streets, should be avoided.

9 Tree Protection Over 550 Mature Trees Along VFW Parkway DCR Jurisdiction

10 Proposed Construction - Proposed sewer will be installed toward the center of Northbound travel lanes of the Parkway to avoid damage to trees

11 Traffic Volumes Automatic traffic recorder and manual turning movement counts were performed to determine volumes along the VFW Parkway

12 Traffic Volumes Even distribution of traffic throughout the day

13 Proposed Construction - Typical construction work site will require a 25 foot wide work zone - Proposed Sewer Construction will require both Northbound lanes be closed to traffic

14 Construction Work Zones Police Detail Police Detail CHARLES Temporary Bidirectional Traffic Flow RIVER Temporary Bidirectional Traffic Flow A Merge 2 Lanes to 1 Merge 2 Lanes to 1 Barricades with limited access to local abutters and emergency vehicles Police Controlled Merge 2 Lanes to 1 VA Hospital Pipe Laying Operations A Barricades with limited access to local abutters and emergency vehicles Police Controlled Pipe Laying Operations A Merge 2 Lanes to 1 Traffic lane shift through existing median breaks

15 Traffic Volumes One lane for Northbound traffic and one for Southbound traffic will reduce capacity and cause significant backups for daytime construction

16 Noise Analysis Sound radiates from construction site Sound decreases with distance from construction Circle of sound moves at the rate of construction

17 ST. JOSEPH CEMETERY CITY TOWN OF OF BOSTON DEDHAM DCR BRYAN MEMORIAL RINK CHARLES PARK ROAD WEST ROXBURY HIGH SCHOOL VFW PARKWAY MBTA RAILROAD LINE BAKER STREET LAGRANGE STREET COREY STREET BRIDGE STREET BOSTON TRAILER PARK SPRING STREET SCALE GARDNER STREET VETERANS ADMINSTRATION MEDICAL CENTER 6 DRIVE/RECEIVING PITS 1,910 L.F. OF TUNNELING 14,590 L.F. OF CUT-AND-COVER PIPE Construction Techniques

18 ST. JOSEPH CEMETERY CITY TOWN OF OF BOSTON DEDHAM DCR BRYAN MEMORIAL RINK CHARLES PARK ROAD WEST ROXBURY HIGH SCHOOL VFW PARKWAY MBTA RAILROAD LINE BAKER STREET LAGRANGE STREET COREY STREET BRIDGE STREET BOSTON TRAILER PARK SPRING STREET GARDNER STREET VETERANS ADMINSTRATION MEDICAL CENTER SCALE AREAS OF ROCK Rock Excavations

19 ST. JOSEPH CEMETERY CITY TOWN OF OF BOSTON DEDHAM DCR BRYAN MEMORIAL RINK CHARLES PARK ROAD WEST ROXBURY HIGH SCHOOL VFW PARKWAY MBTA RAILROAD LINE BAKER STREET LAGRANGE STREET COREY STREET BRIDGE STREET BOSTON TRAILER PARK SPRING STREET GARDNER STREET VETERANS ADMINSTRATION MEDICAL CENTER PIPE INSTALLED IN 2005 PIPE INSTALLED IN SCALE PIPE INSTALLED IN 2007 Construction Schedule