US Bridges

Nj 70 over Blacks Brook

Fair

Ocean County, New Jersey · 1.16 MI SW of 70-547 JCT · Structure no. 1509151

Built
1938
87 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
24,462
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 70 over Blacks Brook is a steel stringer/multi-beam or girder carrying Nj 70 over Blacks Brook in Ocean County, New Jersey. It was built in 1938, so it is 87 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 24,462 vehicles a day, roughly 7% of them trucks, projected to reach 29,849 by 2043. The structure is 36 ft (11 m) long and 49 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNj 70
CrossesBlacks Brook
Location1.16 MI SW of 70-547 JCT
RouteState Highway 70
CountyOcean County
StateNew Jersey
Coordinates40.00842, -74.32991
Functional classRural Principal Arterial - Other

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 inspectionOctober 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span32 ft (9.8 m)
Deck width49 ft (14.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,462 (2023)
Projected traffic29,849 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Nj 70 over Blacks Brook built?

It was built in 1938, making it 87 years old in 2025.

What condition is Nj 70 over Blacks 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 October 2023.

How much traffic does Nj 70 over Blacks Brook carry?

About 24,462 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nj 70 over Blacks Brook?

The structure is 36 ft (11 m) long with a longest span of 32 ft (9.8 m) and a deck 49 ft wide.

Who owns Nj 70 over Blacks Brook?

It is owned by the State Highway Agency.