About the Program

Program Delivery and Phases

The Walk Bridge Replacement Project will be constructed in phases to maintain rail service and reduce impacts to the public.

Design

The new Walk Bridge design

The new Vertical Lift Span will feature a pair of 240-foot vertical lift spans carrying four tracks total. 

Tower height ranges from 105 ft to 140 ft. Vertical clearance ranges from 27ft (closed) to 60 ft (open). Horizontal clearance of 200 ft.

Why a Vertical Lift Span?

Initially, 69 bridge replacement options were identified and screened to select five that best met the Program goals. The screening considered aesthetics relating to the surrounding environment and historic image of the bridge, navigational clearances, resiliency to withstand extreme weather and storm surges, and constructability.

Of those five bridge replacement options that best met Program goals, three design alternatives were advanced for further evaluation; the 170' Rolling Bascule bridge, the 170' Vertical Lift Span Bridge, and the 240' Vertical Lift Span Bridge. 

The Environmental Assessment/Section 4(f) Evaluation/Environmental Impact Evaluation (EA/EIE) identified a preferred alternative: the 240' Vertical Lift Bridge.

The selection of a Long Span Vertical Lift Bridge as the preferred alternative was based on a comparison of factors such as construction duration, risk, navigation and local road impacts, environmental footprint, long-term performance, aesthetic flexibility and cost as they relate to the Project's Purpose and Need Statement. 

In July 2017, the Federal Transit Administration (FTA) issued a Finding of No Significant Impact (FONSI) for the Walk Bridge Replacement Project. The issuance of the FONSI by the FTA indicates that all regulatory requirements have been met, and that no further evaluation of the Walk Bridge Replacement Project is required under the National Environmental Policy Act (NEPA). This finding allowed the Program to move forward with design of the 240' Vertical Lift Bridge.

The environmental review for the Walk Bridge Replacement Project was conducted in accordance with the requirements of the National Environmental Policy Act (NEPA) and the Connecticut Environmental Policy Act (CEPA). Under this joint NEPA/CEPA process, a combined Environmental Assessment/Environmental Impact Evaluation (EA/EIE) was prepared. The goal of the environmental review was to promote informed decision-making by considering a range of reasonable alternatives and facilitate analysis which eventually led to the selection of the preferred alternative, the Vertical Lift Span Bridge. 

Construction Manager/General Contractor

CTDOT is utilizing the innovative Construction Manager/General Contractor (CM/GC) project delivery method for the Walk Bridge Program. With the CM/GC process, the contractor acts as Construction Manager during design and advises CTDOT on schedule, phasing, constructability, materials availability, risk, and cost. This integrated team approach of involving the Contractor early in the project adds value by reducing impacts, improving construction sequencing, and reducing risk.

The Walk Bridge Program also strives to use innovative Accelerated Bridge Construction (ABC) techniques to reduce the duration of construction and impacts to the public.

Construction of the complex Walk Bridge Program will be phased to allow rail service to continue throughout construction and to reduce impacts to the community.

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