US Bridges

Allenwd-Lakewd.Rd. over Manasquan River

Fair

Monmouth County, New Jersey · 1.08 Miles South of NJ34. · Structure no. 13000W3

Built
1900
125 years old, rebuilt 1992
Condition
Fair
inspected May 2023
Type
Truss - Thru
Steel
Length
184 ft
2 main spans
Daily traffic
4,891
2023 count
Owner
County
County Highway Agency

About this bridge

Allenwd-Lakewd.Rd. over Manasquan River is a steel truss - thru carrying Allenwd-Lakewd.Rd. over Manasquan River in Monmouth County, New Jersey. It was built in 1900 and reconstructed in 1992, so it is 125 years old, older than the New Jersey average of 58.5 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 4,891 vehicles a day, roughly 1% of them trucks, projected to reach 5,968 by 2043. The structure is 184 ft (56.1 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesAllenwd-Lakewd.Rd.
CrossesManasquan River
Location1.08 Miles South of NJ34.
RouteCounty Highway 21
CountyMonmouth County
StateNew Jersey
Coordinates40.13698, -74.10799
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans2
Design loadUnknown
Structure length184 ft (56.1 m)
Longest span89 ft (27.1 m)
Deck width25 ft (7.6 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,891 (2023)
Projected traffic5,968 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$10.9 million (2023 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Allenwd-Lakewd.Rd. over Manasquan River built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1992.

What condition is Allenwd-Lakewd.Rd. over Manasquan River 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 May 2023.

How much traffic does Allenwd-Lakewd.Rd. over Manasquan River carry?

About 4,891 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Allenwd-Lakewd.Rd. over Manasquan River?

The structure is 184 ft (56.1 m) long with a longest span of 89 ft (27.1 m) and a deck 25 ft wide.

Who owns Allenwd-Lakewd.Rd. over Manasquan River?

It is owned by the County Highway Agency.