US Bridges

Old Clinton Road over Assiscong Creek

Fair

Hunterdon County, New Jersey · .36 Mi.N. of CR.612 · Structure no. 1000128

Built
1923
102 years old, rebuilt 1983
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
2,771
2023 count
Owner
County
County Highway Agency

About this bridge

Old Clinton Road over Assiscong Creek is a prestressed concrete box beam or girders - multiple carrying Old Clinton Road over Assiscong Creek in Hunterdon County, New Jersey. It was built in 1923 and reconstructed in 1983, so it is 102 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 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 2,771 vehicles a day, roughly 1% of them trucks, projected to reach 3,381 by 2043. The structure is 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesOld Clinton Road
CrossesAssiscong Creek
Location.36 Mi.N. of CR.612
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.54056, -74.86379
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
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,771 (2023)
Projected traffic3,381 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$266,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Clinton Road over Assiscong Creek built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1983.

What condition is Old Clinton Road over Assiscong Creek 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 April 2023.

How much traffic does Old Clinton Road over Assiscong Creek carry?

About 2,771 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Old Clinton Road over Assiscong Creek?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns Old Clinton Road over Assiscong Creek?

It is owned by the County Highway Agency.