US Bridges

Penna Ave Ext over Trib So Br Raritan River

Fair

Hunterdon County, New Jersey · 0.4 MI West River RD JCT · Structure no. 1000102

Built
1872
153 years old, rebuilt 1961
Condition
Fair
inspected March 2023
Type
Arch - Deck
Masonry
Length
21 ft
1 main span
Daily traffic
4,022
2023 count
Owner
County
County Highway Agency

About this bridge

Penna Ave Ext over Trib So Br Raritan River is a masonry arch - deck carrying Penna Ave Ext over Trib So Br Raritan River in Hunterdon County, New Jersey. It was built in 1872 and reconstructed in 1961, so it is 153 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 4,022 vehicles a day, roughly 1% of them trucks, projected to reach 4,908 by 2043. The structure is 21 ft (6.4 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesPenna Ave Ext
CrossesTrib So Br Raritan River
Location0.4 MI West River RD JCT
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.51935, -74.83375
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,022 (2023)
Projected traffic4,908 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$807,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Penna Ave Ext over Trib So Br Raritan River built?

It was built in 1872, making it 153 years old in 2025. It was reconstructed in 1961.

What condition is Penna Ave Ext over Trib So Br 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 March 2023.

How much traffic does Penna Ave Ext over Trib So Br Raritan River carry?

About 4,022 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Penna Ave Ext over Trib So Br Raritan River?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns Penna Ave Ext over Trib So Br Raritan River?

It is owned by the County Highway Agency.