US Bridges

Bentley Road over Millstone River

Fair

Middlesex County, New Jersey · 0.4 Mile North of RTE 33 · Structure no. 125B153

Built
1982
43 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

Bentley Road over Millstone River is a concrete culvert carrying Bentley Road over Millstone River in Middlesex County, New Jersey. It was built in 1982, so it is 43 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 250 vehicles a day, roughly 3% of them trucks, projected to reach 305 by 2043. The structure is 32 ft (9.8 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBentley Road
CrossesMillstone River
Location0.4 Mile North of RTE 33
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.2695, -74.4665
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
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 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79 US tons
Inventory rating47 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span16 ft (4.9 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic305 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 Bentley Road over Millstone River built?

It was built in 1982, making it 43 years old in 2025.

What condition is Bentley Road over Millstone 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 March 2023.

How much traffic does Bentley Road over Millstone River carry?

About 250 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Bentley Road over Millstone River?

The structure is 32 ft (9.8 m) long with a longest span of 16 ft (4.9 m) and a deck 33 ft wide.

Who owns Bentley Road over Millstone River?

It is owned by the County Highway Agency.