US Bridges

Hillsdale Road over Big Brook

Good

Monmouth County, New Jersey · 1.5 Miles West of Nj 34 · Structure no. 13000A4

Built
2018
7 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
2,640
2023 count
Owner
County
County Highway Agency

About this bridge

Hillsdale Road over Big Brook is a prestressed concrete box beam or girders - multiple carrying Hillsdale Road over Big Brook in Monmouth County, New Jersey. It was built in 2018, so it is 7 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,640 vehicles a day, roughly 3% of them trucks, projected to reach 3,221 by 2043. The structure is 54 ft (16.5 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHillsdale Road
CrossesBig Brook
Location1.5 Miles West of Nj 34
CountyMonmouth County
StateNew Jersey
Coordinates40.31966, -74.21401
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating59.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length54 ft (16.5 m)
Longest span49 ft (14.9 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,640 (2023)
Projected traffic3,221 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Hillsdale Road over Big Brook built?

It was built in 2018, making it 7 years old in 2025.

What condition is Hillsdale Road over Big Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Hillsdale Road over Big Brook carry?

About 2,640 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Hillsdale Road over Big Brook?

The structure is 54 ft (16.5 m) long with a longest span of 49 ft (14.9 m) and a deck 28 ft wide.

Who owns Hillsdale Road over Big Brook?

It is owned by the County Highway Agency.