US Bridges

Wilhousky Street over Trib of Millstone River

Good

Somerset County, New Jersey · 0.08 MI South of CR 533 · Structure no. 18G0609

Built
1995
30 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
42 ft
2 main spans
Daily traffic
13,307
2023 count
Owner
County
County Highway Agency

About this bridge

Wilhousky Street over Trib of Millstone River is a concrete culvert carrying Wilhousky Street over Trib of Millstone River in Somerset County, New Jersey. It was built in 1995, so it is 30 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,307 vehicles a day, roughly 3% of them trucks, projected to reach 16,237 by 2043. The structure is 42 ft (12.8 m) long and 53 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesWilhousky Street
CrossesTrib of Millstone River
Location0.08 MI South of CR 533
RouteCounty Highway 623
Coordinates40.53038, -74.58909
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length42 ft (12.8 m)
Longest span20 ft (6.1 m)
Deck width53 ft (16.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,307 (2023)
Projected traffic16,237 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 Wilhousky Street over Trib of Millstone River built?

It was built in 1995, making it 30 years old in 2025.

What condition is Wilhousky Street over Trib of Millstone River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Wilhousky Street over Trib of Millstone River carry?

About 13,307 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Wilhousky Street over Trib of Millstone River?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.1 m) and a deck 53 ft wide.

Who owns Wilhousky Street over Trib of Millstone River?

It is owned by the County Highway Agency.