US Bridges

Nj 18 over Hockhockson Brook

Fair

Monmouth County, New Jersey · 1.75 MI S of Rt 34 · Structure no. 1323160

Built
1972
53 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
35 ft
2 main spans
Daily traffic
43,931
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 18 over Hockhockson Brook is a concrete culvert carrying Nj 18 over Hockhockson Brook in Monmouth County, New Jersey. It was built in 1972, so it is 53 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 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 43,931 vehicles a day, roughly 5% of them trucks, projected to reach 53,248 by 2043. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNj 18
CrossesHockhockson Brook
Location1.75 MI S of Rt 34
RouteState Highway 18
CountyMonmouth County
StateNew Jersey
Coordinates40.28229, -74.13883
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length35 ft (10.7 m)
Longest span16 ft (4.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,931 (2023)
Projected traffic53,248 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 18 over Hockhockson Brook built?

It was built in 1972, making it 53 years old in 2025.

What condition is Nj 18 over Hockhockson 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 July 2023.

How much traffic does Nj 18 over Hockhockson Brook carry?

About 43,931 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nj 18 over Hockhockson Brook?

The structure is 35 ft (10.7 m) long with a longest span of 16 ft (4.9 m).

Who owns Nj 18 over Hockhockson Brook?

It is owned by the State Highway Agency.