US Bridges

Mill Road over Gravelly Brook

Good

Monmouth County, New Jersey · 0.18 Miles South of Nj 34 · Structure no. 1300MA5

Built
1997
28 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
5,368
2023 count
Owner
County
County Highway Agency

About this bridge

Mill Road over Gravelly Brook is a prestressed concrete box beam or girders - multiple carrying Mill Road over Gravelly Brook in Monmouth County, New Jersey. It was built in 1997, so it is 28 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,368 vehicles a day, roughly 1% of them trucks, projected to reach 6,550 by 2043. The structure is 40 ft (12.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMill Road
CrossesGravelly Brook
Location0.18 Miles South of Nj 34
RouteCity Street 0
CountyMonmouth County
StateNew Jersey
Coordinates40.39907, -74.23178
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating78 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width32 ft (9.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,368 (2023)
Projected traffic6,550 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Gravelly Brook built?

It was built in 1997, making it 28 years old in 2025.

What condition is Mill Road over Gravelly 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 Mill Road over Gravelly Brook carry?

About 5,368 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Mill Road over Gravelly Brook?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 32 ft wide.

Who owns Mill Road over Gravelly Brook?

It is owned by the County Highway Agency.