US Bridges

Hermitage Avenue over De.& Raritan Canal Fdr

FairPosted for load

Mercer County, New Jersey · 1/4 Mile North of RTE 29 · Structure no. 3001159

Built
1952
73 years old
Condition
Fair
inspected February 2024
Type
Slab
Wood or Timber
Length
32 ft
2 main spans
Daily traffic
6,352
2024 count
Owner
State
State Highway Agency

About this bridge

Hermitage Avenue over De.& Raritan Canal Fdr is a wood or timber slab carrying Hermitage Avenue over De.& Raritan Canal Fdr in Mercer County, New Jersey. It was built in 1952, so it is 73 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 6,352 vehicles a day, roughly 3% of them trucks, projected to reach 7,751 by 2044. The structure is 32 ft (9.8 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHermitage Avenue
CrossesDe.& Raritan Canal Fdr
Location1/4 Mile North of RTE 29
RouteCity Street 0
CountyMercer County
StateNew Jersey
Coordinates40.2316, -74.78189
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating16 US tons
Inventory rating8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span15 ft (4.6 m)
Deck width44 ft (13.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic6,352 (2024)
Projected traffic7,751 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Hermitage Avenue over De.& Raritan Canal Fdr built?

It was built in 1952, making it 73 years old in 2025.

What condition is Hermitage Avenue over De.& Raritan Canal Fdr 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 February 2024.

How much traffic does Hermitage Avenue over De.& Raritan Canal Fdr carry?

About 6,352 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Hermitage Avenue over De.& Raritan Canal Fdr?

The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.6 m) and a deck 44 ft wide.

Who owns Hermitage Avenue over De.& Raritan Canal Fdr?

It is owned by the State Highway Agency.