US Bridges

Buffalo Hollow Rd. over Willoughby Brook

Fair

Hunterdon County, New Jersey · 0.5 Mi.Ne.Of Nj 31 JCT · Structure no. 1000085

Built
1908
117 years old, rebuilt 1983
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
420
2023 count
Owner
County
County Highway Agency

About this bridge

Buffalo Hollow Rd. over Willoughby Brook is a steel stringer/multi-beam or girder carrying Buffalo Hollow Rd. over Willoughby Brook in Hunterdon County, New Jersey. It was built in 1908 and reconstructed in 1983, so it is 117 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 420 vehicles a day, roughly 3% of them trucks, projected to reach 513 by 2043. The structure is 29 ft (8.8 m) long and 14 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBuffalo Hollow Rd.
CrossesWilloughby Brook
Location0.5 Mi.Ne.Of Nj 31 JCT
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.68112, -74.90832
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating95 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2023)
Projected traffic513 by 2043
Trucks3%
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$271,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Buffalo Hollow Rd. over Willoughby Brook built?

It was built in 1908, making it 117 years old in 2025. It was reconstructed in 1983.

What condition is Buffalo Hollow Rd. over Willoughby 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 April 2023.

How much traffic does Buffalo Hollow Rd. over Willoughby Brook carry?

About 420 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Buffalo Hollow Rd. over Willoughby Brook?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 14 ft wide.

Who owns Buffalo Hollow Rd. over Willoughby Brook?

It is owned by the County Highway Agency.