US Bridges

Nj 24 Freeway over W. Branch Black Brook

Fair

Morris County, New Jersey · 0.82 MI E of CR 510 · Structure no. 1422153

Built
1989
36 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
105,970
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 24 Freeway over W. Branch Black Brook is a prestressed concrete box beam or girders - multiple carrying Nj 24 Freeway over W. Branch Black Brook in Morris County, New Jersey. It was built in 1989, so it is 36 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 105,970 vehicles a day, roughly 5% of them trucks, projected to reach 127,165 by 2043. The structure is 57 ft (17.4 m) long and 124 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNj 24 Freeway
CrossesW. Branch Black Brook
Location0.82 MI E of CR 510
RouteState Highway 24
Coordinates40.78369, -74.41737
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating110.1 US tons
Inventory rating68 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length57 ft (17.4 m)
Longest span52 ft (15.8 m)
Deck width124 ft (37.9 m)
Roadway width117 ft (35.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105,970 (2023)
Projected traffic127,165 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 24 Freeway over W. Branch Black Brook built?

It was built in 1989, making it 36 years old in 2025.

What condition is Nj 24 Freeway over W. Branch Black 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 2023.

How much traffic does Nj 24 Freeway over W. Branch Black Brook carry?

About 105,970 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nj 24 Freeway over W. Branch Black Brook?

The structure is 57 ft (17.4 m) long with a longest span of 52 ft (15.8 m) and a deck 124 ft wide.

Who owns Nj 24 Freeway over W. Branch Black Brook?

It is owned by the State Highway Agency.