US Bridges

Langstaff Avenue over Ambrose Brook

Fair

Middlesex County, New Jersey · 600 Feet N of Rt 27 · Structure no. 122B514

Built
1900
125 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
3,295
2023 count
Owner
County
County Highway Agency

About this bridge

Langstaff Avenue over Ambrose Brook is a concrete culvert carrying Langstaff Avenue over Ambrose Brook in Middlesex County, New Jersey. It was built in 1900, 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 3,295 vehicles a day, roughly 1% of them trucks, projected to reach 4,020 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLangstaff Avenue
CrossesAmbrose Brook
Location600 Feet N of Rt 27
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.52314, -74.39425
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating30 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,295 (2023)
Projected traffic4,020 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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$14,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Langstaff Avenue over Ambrose Brook built?

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

What condition is Langstaff Avenue 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 March 2023.

How much traffic does Langstaff Avenue over Ambrose Brook carry?

About 3,295 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Langstaff Avenue over Ambrose Brook?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m).

Who owns Langstaff Avenue over Ambrose Brook?

It is owned by the County Highway Agency.