US Bridges

Jackson Road over N.Branch Raritan River

GoodPosted for load

Somerset County, New Jersey · At Intersect of Branch RD · Structure no. 18E1401

Built
1927
98 years old, rebuilt 2008
Condition
Good
inspected August 2023
Type
Truss - Thru
Steel
Length
62 ft
1 main span
Daily traffic
104
2023 count
Owner
County
County Highway Agency

About this bridge

Jackson Road over N.Branch Raritan River is a steel truss - thru carrying Jackson Road over N.Branch Raritan River in Somerset County, New Jersey. It was built in 1927 and reconstructed in 2008, so it is 98 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. Its operating status is: posted for load restriction.

It carries about 104 vehicles a day, projected to reach 125 by 2043. The structure is 62 ft (18.9 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesJackson Road
CrossesN.Branch Raritan River
LocationAt Intersect of Branch RD
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.7315, -74.6356
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length62 ft (18.9 m)
Longest span57 ft (17.4 m)
Deck width24 ft (7.3 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic104 (2023)
Projected traffic125 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$217,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jackson Road over N.Branch Raritan River built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 2008.

What condition is Jackson Road over N.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 August 2023.

How much traffic does Jackson Road over N.Branch Raritan River carry?

About 104 vehicles per day (2023 count).

How long is Jackson Road over N.Branch Raritan River?

The structure is 62 ft (18.9 m) long with a longest span of 57 ft (17.4 m) and a deck 24 ft wide.

Who owns Jackson Road over N.Branch Raritan River?

It is owned by the County Highway Agency.