US Bridges

INTERSTATE-691 EB over Willow Brook

Fair

New Haven County, Connecticut · 315 Ft E of Route 15 · Structure no. 03049

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
22,500
2021 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-691 EB over Willow Brook is a concrete continuous culvert carrying INTERSTATE-691 EB over Willow Brook 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 22,500 vehicles a day, roughly 9% of them trucks, projected to reach 33,433 by 2041. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesINTERSTATE-691 EB
CrossesWillow Brook
Location315 Ft E of Route 15
RouteInterstate 691
CountyNew Haven County
StateConnecticut
Coordinates41.53869, -72.76931
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,500 (2021)
Projected traffic33,433 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was INTERSTATE-691 EB over Willow Brook built?

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

What condition is INTERSTATE-691 EB over Willow Brook 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 2023.

How much traffic does INTERSTATE-691 EB over Willow Brook carry?

About 22,500 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is INTERSTATE-691 EB over Willow Brook?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m).

Who owns INTERSTATE-691 EB over Willow Brook?

It is owned by the State Highway Agency.