US Bridges

Route 10 over Interstate 691

Fair

New Haven County, Connecticut · I-691 Exit 3 · Structure no. 05323

Built
1984
41 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
2 main spans
Daily traffic
14,700
2022 count
Owner
State
State Highway Agency

About this bridge

Route 10 over Interstate 691 is a steel continuous stringer/multi-beam or girder carrying Route 10 over Interstate 691 in New Haven County, Connecticut. It was built in 1984, so it is 41 years old, younger 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 14,700 vehicles a day, roughly 6% of them trucks, projected to reach 21,843 by 2042. The structure is 235 ft (71.6 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 10
CrossesInterstate 691
LocationI-691 Exit 3
RouteState Highway 10
Coordinates41.55695, -72.89058
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length235 ft (71.6 m)
Longest span130 ft (39.6 m)
Deck width69 ft (20.9 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,700 (2022)
Projected traffic21,843 by 2042
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Route 10 over Interstate 691 built?

It was built in 1984, making it 41 years old in 2025.

What condition is Route 10 over Interstate 691 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 November 2023.

How much traffic does Route 10 over Interstate 691 carry?

About 14,700 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Route 10 over Interstate 691?

The structure is 235 ft (71.6 m) long with a longest span of 130 ft (39.6 m) and a deck 69 ft wide.

Who owns Route 10 over Interstate 691?

It is owned by the State Highway Agency.