US Bridges

Island Road over Rockaway Creek

FairPosted for load

Hunterdon County, New Jersey · 0.8 MI North of US 22 · Structure no. 10XXR19

Built
1900
125 years old, rebuilt 2001
Condition
Fair
inspected May 2023
Type
Girder and Floorbeam System
Steel
Length
70 ft
1 main span
Daily traffic
103
2023 count
Owner
County
County Highway Agency

About this bridge

Island Road over Rockaway Creek is a steel girder and floorbeam system carrying Island Road over Rockaway Creek in Hunterdon County, New Jersey. It was built in 1900 and reconstructed in 2001, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 103 vehicles a day, roughly 3% of them trucks, projected to reach 123 by 2043. The structure is 70 ft (21.3 m) long and 14 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesIsland Road
CrossesRockaway Creek
Location0.8 MI North of US 22
CountyHunterdon County
StateNew Jersey
Coordinates40.62327, -74.7209
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating32 US tons
Inventory rating19 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length70 ft (21.3 m)
Longest span69 ft (21 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103 (2023)
Projected traffic123 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Island Road over Rockaway Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2001.

What condition is Island Road over Rockaway 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 May 2023.

How much traffic does Island Road over Rockaway Creek carry?

About 103 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Island Road over Rockaway Creek?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 14 ft wide.

Who owns Island Road over Rockaway Creek?

It is owned by the County Highway Agency.