US Bridges

Hainsburg River RD over Stony Brook

Fair

Warren County, New Jersey · 0.5 Mile East of I-80 · Structure no. 2101350

Built
1950
75 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
327
2023 count
Owner
County
County Highway Agency

About this bridge

Hainsburg River RD over Stony Brook is a steel stringer/multi-beam or girder carrying Hainsburg River RD over Stony Brook in Warren County, New Jersey. It was built in 1950, so it is 75 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 327 vehicles a day, roughly 3% of them trucks, projected to reach 400 by 2043. The structure is 34 ft (10.4 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesHainsburg River RD
CrossesStony Brook
Location0.5 Mile East of I-80
RouteCity Street 0
CountyWarren County
StateNew Jersey
Coordinates40.94393, -75.09679
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating87 US tons
Inventory rating52 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic327 (2023)
Projected traffic400 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hainsburg River RD over Stony Brook built?

It was built in 1950, making it 75 years old in 2025.

What condition is Hainsburg River RD over Stony Brook 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 Hainsburg River RD over Stony Brook carry?

About 327 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Hainsburg River RD over Stony Brook?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns Hainsburg River RD over Stony Brook?

It is owned by the County Highway Agency.