Proj Overview
ConnDOT upgrades infrastructure using precast concrete components

The Connecticut Department of Transportation (ConnDOT) has completed the rehabilitation of Bridge 01343, carrying Route 133 over the Housatonic River in Litchfield County. Work began on the 851-foot bridge in the spring of 2019 led by Mohawk Northeast, Inc. and the $10M project was completed in the fall of 2019.

Built in 1955, the bridge required the repair of the deck, joints, parapet as well as drainage improvements and the painting of the bearings on the structure. Since the crossing does not get heavy traffic in this semi-rural area, the project implemented alternating one-way traffic through the construction zone. About 3,500 drivers pass over it daily, which straddles the border between Brookfield and Bridgewater.

For their part in the project, Coreslab Structures (CONN) manufactured and installed

exodermic bridge deck slabs. The exodermic bridge decking is a lightweight solution for the weight limit constraints of the older structure. The system combines a durable precast concrete slab with characteristics of open grid steel decks.

Precast concrete deck panels are often used in Accelerated Bridge Construction (ABC), but in this instance they offered advantages such as minimal onsite formwork, reduced labor and structural costs. The upgraded precast deck required less maintenance.

Coreslab Structures (CONN) also provided precast concrete components (footings, abutment walls, wall caps, approach slabs and backwalls) for the replacement of Bridge 03163 and Bridge 03164 carrying Route 160 over I-91 in Rocky Hill, CT. The project consisted of the full replacement of both structures over the interstate. They were replaced with single-span steel girder superstructures on precast concrete abutments. The existing structures were structurally deficient and functionally obsolete. The $11.4M project was completed in October of 2019.

Both existing three-span bridges were replaced with a single span and were completed within the 60 day schedule via Self-Propelled Modular Transport (SPMT) method. The superstructure for the new bridges were partially constructed off-site and then moved into place once the old bridges were moved and abutments were constructed.

The ConnDOT utilized precast concrete in different ways to upgrade aging bridge stock. The results are structures that provide safe passage and require minimal maintenance for years to come.


There are no records.
Project Team


Coreslab Structures (CONN)Inc., Thomaston, CT


State of Connecticut, Hartford, CT


Tectonic Engineering Consultants, Rocky Hill, CT (Route 133 Brookfield/Bridgewater)


Stantec Consulting Services, New Haven, CT ( Route 160 over I-91 Rocky Hill)


Mohawk Northeast, Plantsville, CT (CT Route 133 Brookfield/Bridgewater)


MIG Construction (CT Route 160 over I-91 Rocky Hill)

Photo Credit:

 Coreslab Structures (CONN) Inc.

Key Project Attributes

Sq. Footage: 17,200 SF (Brookfield)

Sq. Footage: 18,300 SF (Rocky Hill)

Project/Precast Scope

Precast Elements: Exodermic Precast Concrete Bridge Deck Replacement System (CT Route 133 Brookfield/Bridgewater)

Precast Elements: Precast Concrete Footings, Abutment Walls, Wall Caps, Approach Slabs and backwalls (CT Route 160 over I-91 Rocky Hill)