US Bridges

US 9 over Milford Brook

Fair

Monmouth County, New Jersey · 3.37 MI N of Rt 33B JCT · Structure no. 1303155

Built
1938
87 years old, rebuilt 1964
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
57,832
2024 count
Owner
State
State Highway Agency

About this bridge

US 9 over Milford Brook is a concrete slab carrying US 9 over Milford Brook in Monmouth County, New Jersey. It was built in 1938 and reconstructed in 1964, 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 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 57,832 vehicles a day, roughly 4% of them trucks, projected to reach 83,018 by 2044. The structure is 25 ft (7.6 m) long and 108 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 9
CrossesMilford Brook
Location3.37 MI N of Rt 33B JCT
RouteU.S. Route 9
CountyMonmouth County
StateNew Jersey
Coordinates40.30618, -74.30378
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width108 ft (32.9 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,832 (2024)
Projected traffic83,018 by 2044
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 9 over Milford Brook built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1964.

What condition is US 9 over Milford 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 June 2024.

How much traffic does US 9 over Milford Brook carry?

About 57,832 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is US 9 over Milford Brook?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 108 ft wide.

Who owns US 9 over Milford Brook?

It is owned by the State Highway Agency.