US Bridges

Route 10 over Willow Brook

Fair

New Haven County, Connecticut · 3.4 MI N of Route 40 · Structure no. 06031

Built
1991
34 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
68 ft
1 main span
Daily traffic
15,300
2022 count
Owner
State
State Highway Agency

About this bridge

Route 10 over Willow Brook is a prestressed concrete box beam or girders - multiple carrying Route 10 over Willow Brook in New Haven County, Connecticut. It was built in 1991, so it is 34 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 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 15,300 vehicles a day, roughly 4% of them trucks, projected to reach 22,734 by 2042. The structure is 68 ft (20.7 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRoute 10
CrossesWillow Brook
Location3.4 MI N of Route 40
RouteState Highway 10
CountyNew Haven County
StateConnecticut
Coordinates41.44899, -72.90987
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating43.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span64 ft (19.5 m)
Deck width66 ft (20.1 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,300 (2022)
Projected traffic22,734 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 10 over Willow Brook built?

It was built in 1991, making it 34 years old in 2025.

What condition is Route 10 over Willow Brook 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 August 2023.

How much traffic does Route 10 over Willow Brook carry?

About 15,300 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Route 10 over Willow Brook?

The structure is 68 ft (20.7 m) long with a longest span of 64 ft (19.5 m) and a deck 66 ft wide.

Who owns Route 10 over Willow Brook?

It is owned by the State Highway Agency.