US Bridges

N.Four Bridges Rd. over Raritan River

Fair

Morris County, New Jersey · .2 M North of Bartley RD · Structure no. 1401119

Built
1994
31 years old
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
74 ft
1 main span
Daily traffic
721
2023 count
Owner
County
County Highway Agency

About this bridge

N.Four Bridges Rd. over Raritan River is a steel truss - thru carrying N.Four Bridges Rd. over Raritan River in Morris County, New Jersey. It was built in 1994, so it is 31 years old, younger 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 721 vehicles a day, roughly 1% of them trucks, projected to reach 880 by 2043. The structure is 74 ft (22.6 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesN.Four Bridges Rd.
CrossesRaritan River
Location.2 M North of Bartley RD
RouteCity Street 0
CountyMorris County
StateNew Jersey
Coordinates40.8094, -74.73678
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length74 ft (22.6 m)
Longest span69 ft (21 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic721 (2023)
Projected traffic880 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 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 N.Four Bridges Rd. over Raritan River built?

It was built in 1994, making it 31 years old in 2025.

What condition is N.Four Bridges Rd. over Raritan River 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 July 2023.

How much traffic does N.Four Bridges Rd. over Raritan River carry?

About 721 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N.Four Bridges Rd. over Raritan River?

The structure is 74 ft (22.6 m) long with a longest span of 69 ft (21 m) and a deck 26 ft wide.

Who owns N.Four Bridges Rd. over Raritan River?

It is owned by the County Highway Agency.