February 12, 2010 Government Center Station Reconstruction Project Green Line / Blue Line Public...

February 12, 2010

Government Center StationReconstruction ProjectGreen Line / Blue Line

Public MeetingDecember, 2012

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

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

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

Existing Station Headhouse

Proposed Station Entrance

Existing City Hall Plaza

Proposed City Hall Plaza

Project Site – Existing

Boston City Hall

Cambridge Street

Station Entrance

JFK Federal Building

City Hall Plaza

Court Stre

et

Proposed Site Plan

Proposed Entrance

Project Limits

Emergency Egress - Only Headhouse

City Hall

Cambridge Street

JFK```

Accessible Routes

Proposed Accessible Routes

Proposed Entrance

Emergency Egress - Only Headhouse

Cambridge Street

Accessible Routes

Proposed City Hall Plaza

Headhouse PlanSix Entrances with Automatic Sliding Doors

Fare Collection

Redundant Elevators

Accessible Restroom

Glass Element with Stairs and Escalators

Headhouse/Station Cross Section

Green Line to Haymarket

Green Line “Brattle Loop”

Surface

To

Green Line

Elevs.

Headhouse Entry

Interior – Entry Lobby

Interior – Paid Lobby

Proposed Head House - Interior

Solid Stair Risers Perforated for Safety and Visibility

Redundant Elevators

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

Green Line StationTrack Clearance Improvements

Existing Platform:About 3-feet Wide

Proposed Platform: About 10-feet Wide

with Tactile Warnings

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

Blue Line Emergency Egress

Blue Line Emergency–only Egress (looking towards Tremont St)

Blue Line Emergency–only Egress (from Cambridge Street)

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

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

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)

Future Access toGovernment Center Station