US Bridges

I-91 SB TR 823 over I-91 Northbound

Fair

Middlesex County, Connecticut · 1.7 N of Route 372 · Structure no. 03151

Built
1965
60 years old, rebuilt 1993
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
257 ft
3 main spans
Daily traffic
13,800
2022 count
Owner
State
State Highway Agency

About this bridge

I-91 SB TR 823 over I-91 Northbound is a steel continuous stringer/multi-beam or girder carrying I-91 SB TR 823 over I-91 Northbound in Middlesex County, Connecticut. It was built in 1965 and reconstructed in 1993, 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 13,800 vehicles a day, roughly 9% of them trucks, projected to reach 20,505 by 2042. The structure is 257 ft (78.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-91 SB TR 823
CrossesI-91 Northbound
Location1.7 N of Route 372
RouteInterstate 91
Coordinates41.62579, -72.68909
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 alignment7: Better than present minimum criteria
Operating rating61.5 US tons
Inventory rating36.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length257 ft (78.3 m)
Longest span118 ft (36 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic13,800 (2022)
Projected traffic20,505 by 2042
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 I-91 SB TR 823 over I-91 Northbound built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1993.

What condition is I-91 SB TR 823 over I-91 Northbound 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 August 2024.

How much traffic does I-91 SB TR 823 over I-91 Northbound carry?

About 13,800 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is I-91 SB TR 823 over I-91 Northbound?

The structure is 257 ft (78.3 m) long with a longest span of 118 ft (36 m) and a deck 44 ft wide.

Who owns I-91 SB TR 823 over I-91 Northbound?

It is owned by the State Highway Agency.