US Bridges

INTERSTATE-91 SB over CSX Railroad

Fair

New Haven County, Connecticut · 2.3 MI N of Route 17 · Structure no. 03103

Built
1965
60 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
101 ft
1 main span
Daily traffic
52,700
2022 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 SB over CSX Railroad is a steel stringer/multi-beam or girder carrying INTERSTATE-91 SB over CSX 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 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 52,700 vehicles a day, roughly 9% of them trucks, projected to reach 78,307 by 2042. The structure is 101 ft (30.8 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesINTERSTATE-91 SB
CrossesCSX Railroad
Location2.3 MI N of Route 17
RouteInterstate 91
CountyNew Haven County
StateConnecticut
Coordinates41.3543, -72.86829
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span98 ft (29.9 m)
Deck width68 ft (20.6 m)
Roadway width64 ft (19.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52,700 (2022)
Projected traffic78,307 by 2042
Trucks9%
Lanes on structure4
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 SB over CSX Railroad built?

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

What condition is INTERSTATE-91 SB over CSX 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 December 2023.

How much traffic does INTERSTATE-91 SB over CSX Railroad carry?

About 52,700 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is INTERSTATE-91 SB over CSX Railroad?

The structure is 101 ft (30.8 m) long with a longest span of 98 ft (29.9 m) and a deck 68 ft wide.

Who owns INTERSTATE-91 SB over CSX Railroad?

It is owned by the State Highway Agency.