february 12, 2010 government center station reconstruction project green line / blue line public...
TRANSCRIPT
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February 12, 2010
Government Center StationReconstruction ProjectGreen Line / Blue Line
Public MeetingDecember, 2012
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Project Purpose
•Accessibility - AAB - 521 CMR Compliance•Modernized, Customer-Friendly Station•New Station Entrance and Lobbies•Redundant Elevators•Upgrade to Current Code Requirements•Complete Electrical System Replacement•New Station Platforms•Improved Lighting• New Fare Gates •Station Entrance that ties into City Hall Plaza
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Project Schedule
• 2009 – BRA Conceptual Design Approval• 2012 – Final Design and Bidding• 2013 – Begin Construction and Station Closure
* 24 month Station Closure & Subway By-pass *
• 2015 – Anticipated Re-Opening
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Stakeholder and Public OutreachMBTA• System-wide Accessibility• Green Line and Blue Line Operations• Security• Safety• Signals• Communications• Engineering & Maintenance• Real Estate Management• Environmental• Design & Construction• Advertising• Track• Electrical Systems and Maintenance• Traction Power• Quality Control
PLANNED• Public Information Meeting October 2012
CITY OF BOSTON• Boston Redevelopment Authority• Property Management• Commission for Person with Disabilities• Boston Landmarks Commission• Public Works Dept.• Boston Transportation Dept.• Boston Water and Sewer Commission• Public Improvements Commission•Mayor’s Office•Parks and Recreation Dept.•Street Lighting
OTHERS•General Services Admin•Federal Transit Admin•Mass DOT•Mass Historical Commission•Area Business Groups•Project Abutters•Private Utilities•Architectural Access Board
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Existing Station Headhouse
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Proposed Station Entrance
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Existing City Hall Plaza
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Proposed City Hall Plaza
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Project Site – Existing
Boston City Hall
Cambridge Street
Station Entrance
JFK Federal Building
City Hall Plaza
Court Stre
et
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Proposed Site Plan
Proposed Entrance
Project Limits
Emergency Egress - Only Headhouse
City Hall
Cambridge Street
JFK```
Accessible Routes
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Proposed Accessible Routes
Proposed Entrance
Emergency Egress - Only Headhouse
Cambridge Street
Accessible Routes
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Proposed City Hall Plaza
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Headhouse PlanSix Entrances with Automatic Sliding Doors
Fare Collection
Redundant Elevators
Accessible Restroom
Glass Element with Stairs and Escalators
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Headhouse/Station Cross Section
Green Line to Haymarket
Green Line “Brattle Loop”
Surface
To
Green Line
Elevs.
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Headhouse Entry
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Interior – Entry Lobby
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Interior – Paid Lobby
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Proposed Head House - Interior
Solid Stair Risers Perforated for Safety and Visibility
Redundant Elevators
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Green Line Station Plan
Redundant Elevatorsto Surface
SCOPE OF WORK
•Raise Entire Station Floor 8-inches
•Install Redundant Elevators
•Construct Rescue Assistance Enclosure
•Replace all Escalators
•Replace Stairs to Surface
•Reconstruct Stairs to Blue Line
•Replace Electrical Substation
•Replace Electrical Room
Rescue Assistance Enclosure Electrical
SubstationRedundant
Elevatorsto Blue Line
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Green Line StationTrack Clearance Improvements
Existing Platform:About 3-feet Wide
Proposed Platform: About 10-feet Wide
with Tactile Warnings
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Blue Line Station Plan
Move Stairs
Construct Redundant Elevators to Green Line
Replace Escalator & Vendor Space
Construct Area of Rescue Assistance and Stairs for
Emergency-Only Egress
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Blue Line Emergency Egress
Blue Line Emergency–only Egress (looking towards Tremont St)
Blue Line Emergency–only Egress (from Cambridge Street)
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Construction Phasing
Criteria:• Minimize Operational Disruptions• Maintain Public and Worker Safety• Minimize Risks of Delays• Maximize Quality of Workmanship
Value Engineering Recommendation:• Station Closure & By-pass
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Construction Phasing
Station Open Alternative (Not Selected)- Construct and Maintain Temp. Headhouse- Increased Cost- Longer Schedule- Mainly Nightwork- Increased Passenger Safety Risks- Increased Service Disruptions- Required Minimum 32+ Weekend Diversions - Required Frequent Changes to Accessible Routes- Required Frequent Changes to Boarding Areas
Phase 1
Phase 2
Phases 3&4
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Construction Phasing
Advantages:- Safer Operations &
Construction- Reduced Travel Impacts- Reduced Project Schedule- Simpler Surface Work- Easier Trip Planning
Disadvantages:- Longer walk for some users- Additional transfer time
Station Closure and By-pass Alternative (Selected Option)
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Future Access toGovernment Center Station