US Bridges

Route 177 over Farmington River

Fair

Hartford County, Connecticut · 0.2 MI S from Route 4 JCT · Structure no. 01487

Built
1939
86 years old, rebuilt 1989
Condition
Fair
inspected May 2024
Type
Truss - Thru
Steel
Length
228 ft
1 main span
Daily traffic
15,500
2021 count
Owner
State
State Highway Agency

About this bridge

Route 177 over Farmington River is a steel truss - thru carrying Route 177 over Farmington River in Hartford County, Connecticut. It was built in 1939 and reconstructed in 1989, so it is 86 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 15,500 vehicles a day, roughly 6% of them trucks, projected to reach 23,031 by 2041. The structure is 228 ft (69.4 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesRoute 177
CrossesFarmington River
Location0.2 MI S from Route 4 JCT
RouteState Highway 177
CountyHartford County
StateConnecticut
Coordinates41.75594, -72.88679
Functional classUrban Minor 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
Deck7 GoodSome minor problems.
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 inspectionMay 2024
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 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 rating25.7 US tons
Inventory rating19.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length228 ft (69.4 m)
Longest span224 ft (68.3 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic15,500 (2021)
Projected traffic23,031 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 177 over Farmington River built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1989.

What condition is Route 177 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 May 2024.

How much traffic does Route 177 over Farmington River carry?

About 15,500 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Route 177 over Farmington River?

The structure is 228 ft (69.4 m) long with a longest span of 224 ft (68.3 m) and a deck 32 ft wide.

Who owns Route 177 over Farmington River?

It is owned by the State Highway Agency.