US Bridges

Raven Rock Bridge over D&r Canal Feeder

Fair

Hunterdon County, New Jersey · Quarry RD RT29 MP25.5+/- · Structure no. 3001180

Built
1950
75 years old, rebuilt 2009
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
713
2023 count
Owner
State
State Highway Agency

About this bridge

Raven Rock Bridge over D&r Canal Feeder is a steel stringer/multi-beam or girder carrying Raven Rock Bridge over D&r Canal Feeder in Hunterdon County, New Jersey. It was built in 1950 and reconstructed in 2009, so it is 75 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 713 vehicles a day, roughly 3% of them trucks, projected to reach 870 by 2043. The structure is 31 ft (9.4 m) long and 14 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesRaven Rock Bridge
CrossesD&r Canal Feeder
LocationQuarry RD RT29 MP25.5+/-
RouteState Lands Road 0
CountyHunterdon County
StateNew Jersey
Coordinates40.41037, -75.03482
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width14 ft (4.2 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic713 (2023)
Projected traffic870 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$139,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Raven Rock Bridge over D&r Canal Feeder built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2009.

What condition is Raven Rock Bridge over D&r Canal Feeder 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 September 2023.

How much traffic does Raven Rock Bridge over D&r Canal Feeder carry?

About 713 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Raven Rock Bridge over D&r Canal Feeder?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 14 ft wide.

Who owns Raven Rock Bridge over D&r Canal Feeder?

It is owned by the State Highway Agency.