US Bridges

Interstate 91 over N Front ST & Quinn River

Fair

New Haven County, Connecticut · 2.3 MI N of I-95 · Structure no. 03093

Built
1964
61 years old, rebuilt 2018
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
512 ft
3 main spans
Daily traffic
129,400
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 91 over N Front ST & Quinn River is a steel continuous stringer/multi-beam or girder carrying Interstate 91 over N Front ST & Quinn River in New Haven County, Connecticut. It was built in 1964 and reconstructed in 2018, so it is 61 years old, older 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 5 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 129,400 vehicles a day, roughly 9% of them trucks, projected to reach 192,275 by 2042. The structure is 512 ft (156 m) long and 139 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesInterstate 91
CrossesN Front ST & Quinn River
Location2.3 MI N of I-95
RouteInterstate 91
Coordinates41.32054, -72.88982
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20
Structure length512 ft (156 m)
Longest span220 ft (67.1 m)
Deck width139 ft (42.5 m)
Roadway width126 ft (38.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic129,400 (2022)
Projected traffic192,275 by 2042
Trucks9%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 91 over N Front ST & Quinn River built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2018.

What condition is Interstate 91 over N Front ST & Quinn 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 June 2024.

How much traffic does Interstate 91 over N Front ST & Quinn River carry?

About 129,400 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Interstate 91 over N Front ST & Quinn River?

The structure is 512 ft (156 m) long with a longest span of 220 ft (67.1 m) and a deck 139 ft wide.

Who owns Interstate 91 over N Front ST & Quinn River?

It is owned by the State Highway Agency.