US Bridges

Route 73 over Steele Brook

Fair

New Haven County, Connecticut · 250 East of Watertown Tl · Structure no. 01115

Built
1914
111 years old, rebuilt 1987
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete Continuous
Length
55 ft
2 main spans
Daily traffic
12,000
2023 count
Owner
State
State Highway Agency

About this bridge

Route 73 over Steele Brook is a concrete continuous tee beam carrying Route 73 over Steele Brook in New Haven County, Connecticut. It was built in 1914 and reconstructed in 1987, so it is 111 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 12,000 vehicles a day, roughly 4% of them trucks, projected to reach 17,831 by 2043. The structure is 55 ft (16.9 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoute 73
CrossesSteele Brook
Location250 East of Watertown Tl
RouteState Highway 73
Coordinates41.58678, -73.08139
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length55 ft (16.9 m)
Longest span24 ft (7.4 m)
Deck width60 ft (18.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2023)
Projected traffic17,831 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 73 over Steele Brook built?

It was built in 1914, making it 111 years old in 2025. It was reconstructed in 1987.

What condition is Route 73 over Steele 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 April 2024.

How much traffic does Route 73 over Steele Brook carry?

About 12,000 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Route 73 over Steele Brook?

The structure is 55 ft (16.9 m) long with a longest span of 24 ft (7.4 m) and a deck 60 ft wide.

Who owns Route 73 over Steele Brook?

It is owned by the State Highway Agency.