US Bridges

School Street over Ambrose Brook

Fair

Middlesex County, New Jersey · 0.7 MI S of New Durham RD · Structure no. 122B195

Built
1992
33 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
3,354
2023 count
Owner
County
County Highway Agency

About this bridge

School Street over Ambrose Brook is a concrete culvert carrying School Street over Ambrose Brook in Middlesex County, New Jersey. It was built in 1992, so it is 33 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 3,354 vehicles a day, roughly 3% of them trucks, projected to reach 4,093 by 2043. The structure is 20 ft (6.1 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSchool Street
CrossesAmbrose Brook
Location0.7 MI S of New Durham RD
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.53439, -74.42851
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating84 US tons
Inventory rating50 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width39 ft (11.9 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,354 (2023)
Projected traffic4,093 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 School Street over Ambrose Brook built?

It was built in 1992, making it 33 years old in 2025.

What condition is School Street over Ambrose 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 School Street over Ambrose Brook carry?

About 3,354 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is School Street over Ambrose Brook?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 39 ft wide.

Who owns School Street over Ambrose Brook?

It is owned by the County Highway Agency.