US Bridges

County Route 513 over Nishisakawick Creek

Fair

Hunterdon County, New Jersey · .02 MI West of CR 625 · Structure no. 1000007

Built
1952
73 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
4,827
2023 count
Owner
County
County Highway Agency

About this bridge

County Route 513 over Nishisakawick Creek is a concrete slab carrying County Route 513 over Nishisakawick Creek in Hunterdon County, New Jersey. It was built in 1952, so it is 73 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 4,827 vehicles a day, roughly 4% of them trucks, projected to reach 5,890 by 2043. The structure is 25 ft (7.6 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Route 513
CrossesNishisakawick Creek
Location.02 MI West of CR 625
RouteCounty Highway 513
CountyHunterdon County
StateNew Jersey
Coordinates40.57254, -75.00978
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width40 ft (12.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,827 (2023)
Projected traffic5,890 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 513 over Nishisakawick Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is County Route 513 over Nishisakawick 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 513 over Nishisakawick Creek carry?

About 4,827 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is County Route 513 over Nishisakawick Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 40 ft wide.

Who owns County Route 513 over Nishisakawick Creek?

It is owned by the County Highway Agency.