US Bridges

INTERSTATE-691 WB over INTERSTATE-91

Fair

New Haven County, Connecticut · 500 East Exit 10-691 Wb. · Structure no. 01831

Built
1965
60 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
287 ft
4 main spans
Daily traffic
13,600
2021 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-691 WB over INTERSTATE-91 is a steel stringer/multi-beam or girder carrying INTERSTATE-691 WB over INTERSTATE-91 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 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 13,600 vehicles a day, roughly 9% of them trucks, projected to reach 20,208 by 2041. The structure is 287 ft (87.5 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesINTERSTATE-691 WB
CrossesINTERSTATE-91
Location500 East Exit 10-691 Wb.
RouteInterstate 691
Coordinates41.53781, -72.76158
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.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length287 ft (87.5 m)
Longest span106 ft (32.3 m)
Deck width48 ft (14.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,600 (2021)
Projected traffic20,208 by 2041
Trucks9%
Lanes on structure3
Traffic directionOne-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-691 WB over INTERSTATE-91 built?

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

What condition is INTERSTATE-691 WB over INTERSTATE-91 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 October 2024.

How much traffic does INTERSTATE-691 WB over INTERSTATE-91 carry?

About 13,600 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is INTERSTATE-691 WB over INTERSTATE-91?

The structure is 287 ft (87.5 m) long with a longest span of 106 ft (32.3 m) and a deck 48 ft wide.

Who owns INTERSTATE-691 WB over INTERSTATE-91?

It is owned by the State Highway Agency.