US Bridges

INTERSTATE-91 NB over Park River & Cso RR

Fair

Hartford County, Connecticut · At Exit 29A · Structure no. 01469A

Built
1964
61 years old, rebuilt 2018
Condition
Fair
inspected February 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
1,350 ft
2 main spans
Daily traffic
51,350
2019 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 NB over Park River & Cso RR is a steel continuous girder and floorbeam system carrying INTERSTATE-91 NB over Park River & Cso RR in Hartford County, Connecticut. It was built in 1964 and reconstructed in 2018, so it is 61 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 51,350 vehicles a day, roughly 9% of them trucks, projected to reach 76,301 by 2039. The structure is 1,350 ft (411.4 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesINTERSTATE-91 NB
CrossesPark River & Cso RR
LocationAt Exit 29A
RouteInterstate 91
Coordinates41.75905, -72.66428
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.1 US tons
Inventory rating20 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+27 approach)
Design loadHS 20
Structure length1,350 ft (411.4 m)
Longest span140 ft (42.7 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deck21 ft (6.6 m)

Traffic and service

Average daily traffic51,350 (2019)
Projected traffic76,301 by 2039
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was INTERSTATE-91 NB over Park River & Cso RR built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2018.

What condition is INTERSTATE-91 NB over Park River & Cso 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 February 2023.

How much traffic does INTERSTATE-91 NB over Park River & Cso RR carry?

About 51,350 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is INTERSTATE-91 NB over Park River & Cso RR?

The structure is 1,350 ft (411.4 m) long with a longest span of 140 ft (42.7 m) and a deck 48 ft wide.

Who owns INTERSTATE-91 NB over Park River & Cso RR?

It is owned by the State Highway Agency.