US Bridges

Capner Street over Walnut Brook

Fair

Hunterdon County, New Jersey · 0.1 MI E of Old Croton RD · Structure no. 1000099

Built
1934
91 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
1,561
2023 count
Owner
County
County Highway Agency

About this bridge

Capner Street over Walnut Brook is a steel stringer/multi-beam or girder carrying Capner Street over Walnut Brook in Hunterdon County, New Jersey. It was built in 1934, so it is 91 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 6 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 1,561 vehicles a day, roughly 1% of them trucks, projected to reach 1,724 by 2043. The structure is 25 ft (7.6 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCapner Street
CrossesWalnut Brook
Location0.1 MI E of Old Croton RD
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.51168, -74.87398
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,561 (2023)
Projected traffic1,724 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$247,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Capner Street over Walnut Brook built?

It was built in 1934, making it 91 years old in 2025.

What condition is Capner Street over Walnut Brook 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 Capner Street over Walnut Brook carry?

About 1,561 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Capner Street over Walnut Brook?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 27 ft wide.

Who owns Capner Street over Walnut Brook?

It is owned by the County Highway Agency.