US Bridges

County Route 579 over Capoolong Creek

Fair

Hunterdon County, New Jersey · 290 Ft. East of CR 615 · Structure no. 1000020

Built
1984
41 years old
Condition
Fair
inspected March 2023
Type
Slab
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
3,811
2023 count
Owner
County
County Highway Agency

About this bridge

County Route 579 over Capoolong Creek is a prestressed concrete slab carrying County Route 579 over Capoolong Creek in Hunterdon County, New Jersey. It was built in 1984, so it is 41 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 5 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 3,811 vehicles a day, roughly 3% of them trucks, projected to reach 4,650 by 2043. The structure is 36 ft (11 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Route 579
CrossesCapoolong Creek
Location290 Ft. East of CR 615
RouteCounty Highway 579
CountyHunterdon County
StateNew Jersey
Coordinates40.57775, -74.96053
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span33 ft (10.1 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,811 (2023)
Projected traffic4,650 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Route 579 over Capoolong Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is County Route 579 over Capoolong 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 March 2023.

How much traffic does County Route 579 over Capoolong Creek carry?

About 3,811 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is County Route 579 over Capoolong Creek?

The structure is 36 ft (11 m) long with a longest span of 33 ft (10.1 m) and a deck 36 ft wide.

Who owns County Route 579 over Capoolong Creek?

It is owned by the County Highway Agency.