US Bridges

County Rt 523 over Conrail

Fair

Hunterdon County, New Jersey · 1.9 MI East of JCT 523&31 · Structure no. 10XXQ11

Built
1963
62 years old, rebuilt 1999
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
131 ft
3 main spans
Daily traffic
10,008
2023 count
Owner
County
County Highway Agency

About this bridge

County Rt 523 over Conrail is a steel stringer/multi-beam or girder carrying County Rt 523 over Conrail in Hunterdon County, New Jersey. It was built in 1963 and reconstructed in 1999, so it is 62 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.

It carries about 10,008 vehicles a day, roughly 4% of them trucks, projected to reach 12,212 by 2043. The structure is 131 ft (39.9 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty Rt 523
CrossesConrail
Location1.9 MI East of JCT 523&31
RouteCounty Highway 523
CountyHunterdon County
StateNew Jersey
Coordinates40.53792, -74.84452
Functional classUrban Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.1 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length131 ft (39.9 m)
Longest span53 ft (16.2 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,008 (2023)
Projected traffic12,212 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed6.2 mi (10 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Rt 523 over Conrail built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1999.

What condition is County Rt 523 over Conrail 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 April 2023.

How much traffic does County Rt 523 over Conrail carry?

About 10,008 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is County Rt 523 over Conrail?

The structure is 131 ft (39.9 m) long with a longest span of 53 ft (16.2 m) and a deck 36 ft wide.

Who owns County Rt 523 over Conrail?

It is owned by the County Highway Agency.