US Bridges

Opie Road over S. Branch Raritan River

Good

Somerset County, New Jersey · South of Riverside Drive · Structure no. 18C0607

Built
1921
104 years old, rebuilt 2006
Condition
Good
inspected October 2023
Type
Truss - Thru
Steel
Length
181 ft
2 main spans
Daily traffic
1,895
2023 count
Owner
County
County Highway Agency

About this bridge

Opie Road over S. Branch Raritan River is a steel truss - thru carrying Opie Road over S. Branch Raritan River in Somerset County, New Jersey. It was built in 1921 and reconstructed in 2006, so it is 104 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,895 vehicles a day, roughly 1% of them trucks, projected to reach 2,275 by 2043. The structure is 181 ft (55.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesOpie Road
CrossesS. Branch Raritan River
LocationSouth of Riverside Drive
RouteCity Street 0
Coordinates40.52584, -74.70576
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckClosed grating
Main spans2
Design loadHS 25 or greater
Structure length181 ft (55.2 m)
Longest span87 ft (26.5 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,895 (2023)
Projected traffic2,275 by 2043
Trucks1%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Opie Road over S. Branch Raritan River built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 2006.

What condition is Opie Road over S. Branch Raritan River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Opie Road over S. Branch Raritan River carry?

About 1,895 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Opie Road over S. Branch Raritan River?

The structure is 181 ft (55.2 m) long with a longest span of 87 ft (26.5 m) and a deck 32 ft wide.

Who owns Opie Road over S. Branch Raritan River?

It is owned by the County Highway Agency.