US Bridges

Herman Thau Road over Beaver Brook

Fair

Hunterdon County, New Jersey · 0.16 MI W. Beaver Bk RD · Structure no. 1000109

Built
1994
31 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Concrete
Length
21 ft
1 main span
Daily traffic
275
2023 count
Owner
County
County Highway Agency

About this bridge

Herman Thau Road over Beaver Brook is a concrete arch - deck carrying Herman Thau Road over Beaver Brook in Hunterdon County, New Jersey. It was built in 1994, so it is 31 years old, younger 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 275 vehicles a day, roughly 1% of them trucks, projected to reach 337 by 2043. The structure is 21 ft (6.4 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesHerman Thau Road
CrossesBeaver Brook
Location0.16 MI W. Beaver Bk RD
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.66759, -74.86523
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2023)
Projected traffic337 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Herman Thau Road over Beaver Brook built?

It was built in 1994, making it 31 years old in 2025.

What condition is Herman Thau Road over Beaver 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 Herman Thau Road over Beaver Brook carry?

About 275 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Herman Thau Road over Beaver Brook?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 29 ft wide.

Who owns Herman Thau Road over Beaver Brook?

It is owned by the County Highway Agency.