US Bridges

Nj 34 over Gravelly Brook

Fair

Monmouth County, New Jersey · .2 Mile South of 79 JCT · Structure no. 1309150

Built
1929
96 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
1 main span
Daily traffic
19,842
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 34 over Gravelly Brook is a steel stringer/multi-beam or girder carrying Nj 34 over Gravelly Brook in Monmouth County, New Jersey. It was built in 1929, so it is 96 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 19,842 vehicles a day, roughly 4% of them trucks, projected to reach 23,809 by 2042. The structure is 39 ft (11.9 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNj 34
CrossesGravelly Brook
Location.2 Mile South of 79 JCT
RouteState Highway 34
CountyMonmouth County
StateNew Jersey
Coordinates40.40608, -74.23288
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length39 ft (11.9 m)
Longest span35 ft (10.7 m)
Deck width69 ft (21 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,842 (2022)
Projected traffic23,809 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$625,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 34 over Gravelly Brook built?

It was built in 1929, making it 96 years old in 2025.

What condition is Nj 34 over Gravelly 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 May 2024.

How much traffic does Nj 34 over Gravelly Brook carry?

About 19,842 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Nj 34 over Gravelly Brook?

The structure is 39 ft (11.9 m) long with a longest span of 35 ft (10.7 m) and a deck 69 ft wide.

Who owns Nj 34 over Gravelly Brook?

It is owned by the State Highway Agency.