US Bridges

INTERSTATE-91 over Grand Avenue

Fair

New Haven County, Connecticut · 0.7 MI N of I-95 · Structure no. 03083

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
71 ft
1 main span
Daily traffic
135,400
2015 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 over Grand Avenue is a steel stringer/multi-beam or girder carrying INTERSTATE-91 over Grand Avenue in New Haven County, Connecticut. It was built in 1965, so it is 60 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 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 135,400 vehicles a day, roughly 9% of them trucks, projected to reach 201,191 by 2035. The structure is 71 ft (21.6 m) long and 172 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesINTERSTATE-91
CrossesGrand Avenue
Location0.7 MI N of I-95
RouteInterstate 91
CountyNew Haven County
StateConnecticut
Coordinates41.30822, -72.91443
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span67 ft (20.4 m)
Deck width172 ft (52.3 m)
Roadway width158 ft (48.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic135,400 (2015)
Projected traffic201,191 by 2035
Trucks9%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was INTERSTATE-91 over Grand Avenue built?

It was built in 1965, making it 60 years old in 2025.

What condition is INTERSTATE-91 over Grand Avenue 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 March 2023.

How much traffic does INTERSTATE-91 over Grand Avenue carry?

About 135,400 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is INTERSTATE-91 over Grand Avenue?

The structure is 71 ft (21.6 m) long with a longest span of 67 ft (20.4 m) and a deck 172 ft wide.

Who owns INTERSTATE-91 over Grand Avenue?

It is owned by the State Highway Agency.