US Bridges

INTERSTATE-91 NB over AMTRAK Railroad

Fair

New Haven County, Connecticut · .65 MI N of Route 22 · Structure no. 03115

Built
1965
60 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
297 ft
3 main spans
Daily traffic
38,000
2022 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 NB over AMTRAK Railroad is a steel stringer/multi-beam or girder carrying INTERSTATE-91 NB over AMTRAK Railroad 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 38,000 vehicles a day, roughly 14% of them trucks, projected to reach 56,464 by 2042. The structure is 297 ft (90.4 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesINTERSTATE-91 NB
CrossesAMTRAK Railroad
Location.65 MI N of Route 22
RouteInterstate 91
CountyNew Haven County
StateConnecticut
Coordinates41.39878, -72.85528
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 inspectionJanuary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length297 ft (90.4 m)
Longest span94 ft (28.7 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,000 (2022)
Projected traffic56,464 by 2042
Trucks14%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 NB over AMTRAK Railroad built?

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

What condition is INTERSTATE-91 NB over AMTRAK Railroad 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 January 2024.

How much traffic does INTERSTATE-91 NB over AMTRAK Railroad carry?

About 38,000 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is INTERSTATE-91 NB over AMTRAK Railroad?

The structure is 297 ft (90.4 m) long with a longest span of 94 ft (28.7 m) and a deck 55 ft wide.

Who owns INTERSTATE-91 NB over AMTRAK Railroad?

It is owned by the State Highway Agency.