US Bridges

Mount Joy Road over Musconetcong River

FairPosted for load

Hunterdon County, New Jersey · 0.1 MI SW of CR 627 · Structure no. 10XXH64

Built
1890
135 years old, rebuilt 2009
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
106 ft
1 main span
Daily traffic
689
2023 count
Owner
County
County Highway Agency

About this bridge

Mount Joy Road over Musconetcong River is a steel truss - thru carrying Mount Joy Road over Musconetcong River in Hunterdon County, New Jersey. It was built in 1890 and reconstructed in 2009, so it is 135 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 689 vehicles a day, projected to reach 827 by 2043. The structure is 106 ft (32.3 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMount Joy Road
CrossesMusconetcong River
Location0.1 MI SW of CR 627
CountyHunterdon County
StateNew Jersey
Coordinates40.60572, -75.1706
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
Deck7 GoodSome minor problems.
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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length106 ft (32.3 m)
Longest span102 ft (31.1 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deck11 ft (3.5 m)

Traffic and service

Average daily traffic689 (2023)
Projected traffic827 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.9 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mount Joy Road over Musconetcong River built?

It was built in 1890, making it 135 years old in 2025. It was reconstructed in 2009.

What condition is Mount Joy Road over Musconetcong 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 Mount Joy Road over Musconetcong River carry?

About 689 vehicles per day (2023 count).

How long is Mount Joy Road over Musconetcong River?

The structure is 106 ft (32.3 m) long with a longest span of 102 ft (31.1 m) and a deck 16 ft wide.

Who owns Mount Joy Road over Musconetcong River?

It is owned by the County Highway Agency.