US Bridges

Montgomery Road over Trib Neshanic River

Fair

Somerset County, New Jersey · .17 MI N of Wertsville RD · Structure no. 18B0405

Built
2002
23 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
1 main span
Daily traffic
1,040
2023 count
Owner
County
County Highway Agency

About this bridge

Montgomery Road over Trib Neshanic River is a steel stringer/multi-beam or girder carrying Montgomery Road over Trib Neshanic River in Somerset County, New Jersey. It was built in 2002, so it is 23 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 1,040 vehicles a day, roughly 3% of them trucks, projected to reach 1,248 by 2043. The structure is 65 ft (19.8 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMontgomery Road
CrossesTrib Neshanic River
Location.17 MI N of Wertsville RD
CountySomerset County
StateNew Jersey
Coordinates40.48035, -74.75466
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating81 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length65 ft (19.8 m)
Longest span59 ft (18 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic1,040 (2023)
Projected traffic1,248 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Montgomery Road over Trib Neshanic River built?

It was built in 2002, making it 23 years old in 2025.

What condition is Montgomery Road over Trib Neshanic 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 August 2023.

How much traffic does Montgomery Road over Trib Neshanic River carry?

About 1,040 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Montgomery Road over Trib Neshanic River?

The structure is 65 ft (19.8 m) long with a longest span of 59 ft (18 m) and a deck 35 ft wide.

Who owns Montgomery Road over Trib Neshanic River?

It is owned by the County Highway Agency.