US Bridges

Federal Road over Manalapan Brook

Fair

Middlesex County, New Jersey · 0.54 Mi. W of Monroe Blvd · Structure no. 125B088

Built
1985
40 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
48 ft
2 main spans
Daily traffic
2,454
2023 count
Owner
County
County Highway Agency

About this bridge

Federal Road over Manalapan Brook is a concrete culvert carrying Federal Road over Manalapan Brook in Middlesex County, New Jersey. It was built in 1985, so it is 40 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 fair condition with a lowest component rating of 6 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 2,454 vehicles a day, roughly 3% of them trucks, projected to reach 2,995 by 2043. The structure is 48 ft (14.6 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFederal Road
CrossesManalapan Brook
Location0.54 Mi. W of Monroe Blvd
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.29613, -74.39792
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length48 ft (14.6 m)
Longest span22 ft (6.7 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,454 (2023)
Projected traffic2,995 by 2043
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Federal Road over Manalapan Brook built?

It was built in 1985, making it 40 years old in 2025.

What condition is Federal Road over Manalapan 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 2023.

How much traffic does Federal Road over Manalapan Brook carry?

About 2,454 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Federal Road over Manalapan Brook?

The structure is 48 ft (14.6 m) long with a longest span of 22 ft (6.7 m) and a deck 34 ft wide.

Who owns Federal Road over Manalapan Brook?

It is owned by the County Highway Agency.