US Bridges

Oak Grove Road over Lockatong Creek

Fair

Hunterdon County, New Jersey · 0.5 MI East of CR 615 · Structure no. 1000070

Built
1933
92 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
2 main spans
Daily traffic
348
2023 count
Owner
County
County Highway Agency

About this bridge

Oak Grove Road over Lockatong Creek is a steel stringer/multi-beam or girder carrying Oak Grove Road over Lockatong Creek in Hunterdon County, New Jersey. It was built in 1933, so it is 92 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 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 348 vehicles a day, roughly 3% of them trucks, projected to reach 424 by 2043. The structure is 36 ft (11 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesOak Grove Road
CrossesLockatong Creek
Location0.5 MI East of CR 615
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.53396, -74.95332
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length36 ft (11 m)
Longest span16 ft (4.9 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic348 (2023)
Projected traffic424 by 2043
Trucks3%
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 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 Oak Grove Road over Lockatong Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is Oak Grove Road over Lockatong 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 Oak Grove Road over Lockatong Creek carry?

About 348 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Oak Grove Road over Lockatong Creek?

The structure is 36 ft (11 m) long with a longest span of 16 ft (4.9 m) and a deck 23 ft wide.

Who owns Oak Grove Road over Lockatong Creek?

It is owned by the County Highway Agency.