US Bridges

Union Street over Gowanus Canal

Fair

Kings County, New York · Over Gowanus Canal · Structure no. 000000002240270

Built
1905
120 years old
Condition
Fair
inspected November 2024
Type
Movable - Bascule
Steel
Length
107 ft
3 main spans
Daily traffic
4,179
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Union Street over Gowanus Canal is a steel movable - bascule carrying Union Street over Gowanus Canal in Kings County, New York. It was built in 1905, so it is 120 years old, older than the New York average of 53 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 4,179 vehicles a day, roughly 6% of them trucks, projected to reach 5,076 by 2041. The structure is 107 ft (32.6 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUnion Street
CrossesGowanus Canal
LocationOver Gowanus Canal
RouteCity Street 0
Coordinates40.67954, -73.9885
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating16.8 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadUnknown
Structure length107 ft (32.6 m)
Longest span56 ft (17 m)
Deck width46 ft (14.1 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,179 (2020)
Projected traffic5,076 by 2041
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$14.9 million (2024 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Union Street over Gowanus Canal built?

It was built in 1905, making it 120 years old in 2025.

What condition is Union Street over Gowanus Canal 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 2024.

How much traffic does Union Street over Gowanus Canal carry?

About 4,179 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Union Street over Gowanus Canal?

The structure is 107 ft (32.6 m) long with a longest span of 56 ft (17 m) and a deck 46 ft wide.

Who owns Union Street over Gowanus Canal?

It is owned by the City or Municipal Highway Agency.