US Bridges

INTERSTATE-91 over Brook

Fair

New Haven County, Connecticut · 3.4 MI N of I-95 · Structure no. 06735

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Culvert
Steel
Length
21 ft
2 main spans
Daily traffic
120,200
2019 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 over Brook is a steel culvert carrying INTERSTATE-91 over 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 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 120,200 vehicles a day, roughly 14% of them trucks, projected to reach 178,605 by 2039. The structure is 21 ft (6.4 m) long and 143 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesINTERSTATE-91
CrossesBrook
Location3.4 MI N of I-95
RouteInterstate 91
CountyNew Haven County
StateConnecticut
Coordinates41.33174, -72.87778
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span9 ft (2.7 m)
Deck width143 ft (43.7 m)
Roadway width135 ft (41.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120,200 (2019)
Projected traffic178,605 by 2039
Trucks14%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 Brook built?

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

What condition is INTERSTATE-91 over 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 March 2023.

How much traffic does INTERSTATE-91 over Brook carry?

About 120,200 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is INTERSTATE-91 over Brook?

The structure is 21 ft (6.4 m) long with a longest span of 9 ft (2.7 m) and a deck 143 ft wide.

Who owns INTERSTATE-91 over Brook?

It is owned by the State Highway Agency.