US Bridges

Schoolhouse Road over Manalapan Brook

Fair

Middlesex County, New Jersey · 0.5 MI W of Buckelew Ave. · Structure no. 125B097

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
6,436
2023 count
Owner
County
County Highway Agency

About this bridge

Schoolhouse Road over Manalapan Brook is a prestressed concrete box beam or girders - multiple carrying Schoolhouse Road over Manalapan Brook in Middlesex County, New Jersey. It was built in 1980, so it is 45 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 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 6,436 vehicles a day, roughly 3% of them trucks, projected to reach 7,853 by 2043. The structure is 56 ft (17.1 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSchoolhouse Road
CrossesManalapan Brook
Location0.5 MI W of Buckelew Ave.
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.32708, -74.41964
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length56 ft (17.1 m)
Longest span51 ft (15.5 m)
Deck width52 ft (16 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,436 (2023)
Projected traffic7,853 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Schoolhouse Road over Manalapan Brook built?

It was built in 1980, making it 45 years old in 2025.

What condition is Schoolhouse 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 March 2023.

How much traffic does Schoolhouse Road over Manalapan Brook carry?

About 6,436 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Schoolhouse Road over Manalapan Brook?

The structure is 56 ft (17.1 m) long with a longest span of 51 ft (15.5 m) and a deck 52 ft wide.

Who owns Schoolhouse Road over Manalapan Brook?

It is owned by the County Highway Agency.