US Bridges

SR 712 (bridge St) over Housatonic River

Fair

Fairfield County, Connecticut · 0.13 MI East of RTE 110 · Structure no. 01659

Built
1918
107 years old
Condition
Fair
inspected May 2022
Type
Arch - Deck
Concrete
Length
466 ft
5 main spans
Daily traffic
9,500
2022 count
Owner
State
State Highway Agency

About this bridge

SR 712 (bridge St) over Housatonic River is a concrete arch - deck carrying SR 712 (bridge St) over Housatonic River in Fairfield County, Connecticut. It was built in 1918, so it is 107 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 9,500 vehicles a day, roughly 6% of them trucks, projected to reach 14,116 by 2042. The structure is 466 ft (142 m) long and 66 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR 712 (bridge St)
CrossesHousatonic River
Location0.13 MI East of RTE 110
RouteState Highway 712
CountyFairfield County
StateConnecticut
Coordinates41.31915, -73.09113
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans5
Design loadUnknown
Structure length466 ft (142 m)
Longest span94 ft (28.7 m)
Deck width66 ft (20.2 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,500 (2022)
Projected traffic14,116 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 712 (bridge St) over Housatonic River built?

It was built in 1918, making it 107 years old in 2025.

What condition is SR 712 (bridge St) over Housatonic 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 2022.

How much traffic does SR 712 (bridge St) over Housatonic River carry?

About 9,500 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR 712 (bridge St) over Housatonic River?

The structure is 466 ft (142 m) long with a longest span of 94 ft (28.7 m) and a deck 66 ft wide.

Who owns SR 712 (bridge St) over Housatonic River?

It is owned by the State Highway Agency.