US Bridges

Harmony School Rd. over Second Neshanic River

Fair

Hunterdon County, New Jersey · West of Hillside Drive · Structure no. 1000130

Built
2000
25 years old
Condition
Fair
inspected March 2023
Type
Slab
Prestressed Concrete
Length
28 ft
2 main spans
Daily traffic
299
2023 count
Owner
County
County Highway Agency

About this bridge

Harmony School Rd. over Second Neshanic River is a prestressed concrete slab carrying Harmony School Rd. over Second Neshanic River in Hunterdon County, New Jersey. It was built in 2000, so it is 25 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 299 vehicles a day, roughly 3% of them trucks, projected to reach 358 by 2041. The structure is 28 ft (8.5 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesHarmony School Rd.
CrossesSecond Neshanic River
LocationWest of Hillside Drive
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.4967, -74.90096
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span12 ft (3.7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic299 (2023)
Projected traffic358 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Harmony School Rd. over Second Neshanic River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Harmony School Rd. over Second 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 March 2023.

How much traffic does Harmony School Rd. over Second Neshanic River carry?

About 299 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Harmony School Rd. over Second Neshanic River?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.7 m) and a deck 28 ft wide.

Who owns Harmony School Rd. over Second Neshanic River?

It is owned by the County Highway Agency.