US Bridges

INTERSTATE-91 over Connecticut Southern RR

Fair

Hartford County, Connecticut · .3 Mile North of Exit 29A · Structure no. 03277

Built
1958
67 years old
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
95,700
2022 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 over Connecticut Southern RR is a concrete frame carrying INTERSTATE-91 over Connecticut Southern RR in Hartford County, Connecticut. It was built in 1958, so it is 67 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 95,700 vehicles a day, roughly 14% of them trucks, projected to reach 142,201 by 2042. The structure is 21 ft (6.4 m) long and 150 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesINTERSTATE-91
CrossesConnecticut Southern RR
Location.3 Mile North of Exit 29A
RouteInterstate 91
Coordinates41.76358, -72.66704
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
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 inspectionNovember 2023
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating108 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadH 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width150 ft (45.7 m)
Roadway width142 ft (43.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95,700 (2022)
Projected traffic142,201 by 2042
Trucks14%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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 over Connecticut Southern RR built?

It was built in 1958, making it 67 years old in 2025.

What condition is INTERSTATE-91 over Connecticut Southern RR 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 November 2023.

How much traffic does INTERSTATE-91 over Connecticut Southern RR carry?

About 95,700 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is INTERSTATE-91 over Connecticut Southern RR?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 150 ft wide.

Who owns INTERSTATE-91 over Connecticut Southern RR?

It is owned by the State Highway Agency.