US Bridges

Rt 33 over Millstone River

Fair

Monmouth County, New Jersey · JCT of RT527ALT&RT33 · Structure no. 1304160

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
31,093
2024 count
Owner
State
State Highway Agency

About this bridge

Rt 33 over Millstone River is a prestressed concrete box beam or girders - multiple carrying Rt 33 over Millstone River in Monmouth County, New Jersey. It was built in 1970, so it is 55 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 31,093 vehicles a day, roughly 7% of them trucks, projected to reach 39,707 by 2044. The structure is 59 ft (18 m) long and 117 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesRt 33
CrossesMillstone River
LocationJCT of RT527ALT&RT33
RouteState Highway 33
Coordinates40.26194, -74.42
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94 US tons
Inventory rating56 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length59 ft (18 m)
Longest span56 ft (17.1 m)
Deck width117 ft (35.7 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,093 (2024)
Projected traffic39,707 by 2044
Trucks7%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt 33 over Millstone River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Rt 33 over Millstone River 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 April 2024.

How much traffic does Rt 33 over Millstone River carry?

About 31,093 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Rt 33 over Millstone River?

The structure is 59 ft (18 m) long with a longest span of 56 ft (17.1 m) and a deck 117 ft wide.

Who owns Rt 33 over Millstone River?

It is owned by the State Highway Agency.