US Bridges

Route 4 over Farmington River

Fair

Hartford County, Connecticut · Int of RTE 4 & River Rd. · Structure no. 00429

Built
1958
67 years old, rebuilt 1986
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
508 ft
5 main spans
Daily traffic
10,900
2021 count
Owner
State
State Highway Agency

About this bridge

Route 4 over Farmington River is a steel stringer/multi-beam or girder carrying Route 4 over Farmington River in Hartford County, Connecticut. It was built in 1958 and reconstructed in 1986, 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 10,900 vehicles a day, roughly 6% of them trucks, projected to reach 16,196 by 2041. The structure is 508 ft (154.7 m) long and 39 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesRoute 4
CrossesFarmington River
LocationInt of RTE 4 & River Rd.
RouteState Highway 4
Coordinates41.76458, -72.89615
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.4 US tons
Inventory rating61.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length508 ft (154.7 m)
Longest span99 ft (30.3 m)
Deck width39 ft (11.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,900 (2021)
Projected traffic16,196 by 2041
Trucks6%
Lanes on structure2
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 1958, making it 67 years old in 2025. It was reconstructed in 1986.

What condition is Route 4 over Farmington River 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 2024.

How much traffic does Route 4 over Farmington River carry?

About 10,900 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Route 4 over Farmington River?

The structure is 508 ft (154.7 m) long with a longest span of 99 ft (30.3 m) and a deck 39 ft wide.

Who owns Route 4 over Farmington River?

It is owned by the State Highway Agency.