US Bridges

Iron Bridge Road over Manasquan River-Trib.

Good

Monmouth County, New Jersey · 0.19 Mile North of Rt 524 · Structure no. 1300F35

Built
1998
27 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
2,496
2023 count
Owner
County
County Highway Agency

About this bridge

Iron Bridge Road over Manasquan River-Trib. is a concrete culvert carrying Iron Bridge Road over Manasquan River-Trib. in Monmouth County, New Jersey. It was built in 1998, so it is 27 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 2,496 vehicles a day, roughly 3% of them trucks, projected to reach 3,045 by 2043. The structure is 25 ft (7.6 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIron Bridge Road
CrossesManasquan River-Trib.
Location0.19 Mile North of Rt 524
RouteCity Street 0
Coordinates40.22115, -74.31355
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width70 ft (21.2 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,496 (2023)
Projected traffic3,045 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Iron Bridge Road over Manasquan River-Trib. built?

It was built in 1998, making it 27 years old in 2025.

What condition is Iron Bridge Road over Manasquan River-Trib. 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 Iron Bridge Road over Manasquan River-Trib. carry?

About 2,496 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Iron Bridge Road over Manasquan River-Trib.?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 70 ft wide.

Who owns Iron Bridge Road over Manasquan River-Trib.?

It is owned by the County Highway Agency.