US Bridges

Interstate 84 West over Housatonic River

Fair

Fairfield County, Connecticut · 1.5 MI East of Exit 11 · Structure no. 04180

Built
1977
48 years old, rebuilt 2022
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
784 ft
4 main spans
Daily traffic
36,800
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 84 West over Housatonic River is a steel continuous stringer/multi-beam or girder carrying Interstate 84 West over Housatonic River in Fairfield County, Connecticut. It was built in 1977 and reconstructed in 2022, so it is 48 years old, younger than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 36,800 vehicles a day, roughly 9% of them trucks, projected to reach 54,681 by 2041. The structure is 784 ft (239 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 84 West
CrossesHousatonic River
Location1.5 MI East of Exit 11
RouteInterstate 84
Coordinates41.43917, -73.24806
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating50.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length784 ft (239 m)
Longest span224 ft (68.3 m)
Deck width64 ft (19.5 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,800 (2021)
Projected traffic54,681 by 2041
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$30 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 84 West over Housatonic River built?

It was built in 1977, making it 48 years old in 2025. It was reconstructed in 2022.

What condition is Interstate 84 West over Housatonic River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Interstate 84 West over Housatonic River carry?

About 36,800 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Interstate 84 West over Housatonic River?

The structure is 784 ft (239 m) long with a longest span of 224 ft (68.3 m) and a deck 64 ft wide.

Who owns Interstate 84 West over Housatonic River?

It is owned by the State Highway Agency.