US Bridges

Union Avenue over Flat Creek

Good

Monmouth County, New Jersey · Borough of Union Beach · Structure no. 13000R7

Built
2008
17 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
4,469
2023 count
Owner
County
County Highway Agency

About this bridge

Union Avenue over Flat Creek is a prestressed concrete slab carrying Union Avenue over Flat Creek in Monmouth County, New Jersey. It was built in 2008, so it is 17 years old, younger than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,469 vehicles a day, roughly 3% of them trucks, projected to reach 5,363 by 2043. The structure is 37 ft (11.3 m) long and 49 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesUnion Avenue
CrossesFlat Creek
LocationBorough of Union Beach
RouteCounty Highway 39
CountyMonmouth County
StateNew Jersey
Coordinates40.44726, -74.16654
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating67 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length37 ft (11.3 m)
Longest span32 ft (9.8 m)
Deck width49 ft (14.9 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,469 (2023)
Projected traffic5,363 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Union Avenue over Flat Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Union Avenue over Flat Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Union Avenue over Flat Creek carry?

About 4,469 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Union Avenue over Flat Creek?

The structure is 37 ft (11.3 m) long with a longest span of 32 ft (9.8 m) and a deck 49 ft wide.

Who owns Union Avenue over Flat Creek?

It is owned by the County Highway Agency.