US Bridges

Route 4 over Farmington River

Good

Hartford County, Connecticut · .2 MI West JCT Route 10 · Structure no. 00431

Built
1955
70 years old, rebuilt 2010
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
408 ft
3 main spans
Daily traffic
20,500
2021 count
Owner
State
State Highway Agency

About this bridge

Route 4 over Farmington River is a steel continuous stringer/multi-beam or girder carrying Route 4 over Farmington River in Hartford County, Connecticut. It was built in 1955 and reconstructed in 2010, so it is 70 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,500 vehicles a day, roughly 6% of them trucks, projected to reach 30,461 by 2041. The structure is 408 ft (124.3 m) long and 58 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesRoute 4
CrossesFarmington River
Location.2 MI West JCT Route 10
RouteState Highway 4
Coordinates41.7288, -72.82848
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating50.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length408 ft (124.3 m)
Longest span150 ft (45.7 m)
Deck width58 ft (17.8 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,500 (2021)
Projected traffic30,461 by 2041
Trucks6%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

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 Route 4 over Farmington River built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2010.

What condition is Route 4 over Farmington River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Route 4 over Farmington River carry?

About 20,500 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Route 4 over Farmington River?

The structure is 408 ft (124.3 m) long with a longest span of 150 ft (45.7 m) and a deck 58 ft wide.

Who owns Route 4 over Farmington River?

It is owned by the State Highway Agency.