US Bridges

Nj 28 over Green Brook

Fair

Somerset County, New Jersey · 1.65 MI East of I-287 JCT · Structure no. 1806156

Built
1961
64 years old, rebuilt 2008
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
128 ft
2 main spans
Daily traffic
21,650
2024 count
Owner
State
State Highway Agency

About this bridge

Nj 28 over Green Brook is a prestressed concrete box beam or girders - multiple carrying Nj 28 over Green Brook in Somerset County, New Jersey. It was built in 1961 and reconstructed in 2008, so it is 64 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 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 21,650 vehicles a day, roughly 4% of them trucks, projected to reach 25,900 by 2044. The structure is 128 ft (39 m) long and 66 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNj 28
CrossesGreen Brook
Location1.65 MI East of I-287 JCT
RouteState Highway 28
CountySomerset County
StateNew Jersey
Coordinates40.56649, -74.5256
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.
Superstructure8 Very GoodNo problems noted.
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 evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating85.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length128 ft (39 m)
Longest span61 ft (18.6 m)
Deck width66 ft (20.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,650 (2024)
Projected traffic25,900 by 2044
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 28 over Green Brook built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2008.

What condition is Nj 28 over Green 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 April 2024.

How much traffic does Nj 28 over Green Brook carry?

About 21,650 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Nj 28 over Green Brook?

The structure is 128 ft (39 m) long with a longest span of 61 ft (18.6 m) and a deck 66 ft wide.

Who owns Nj 28 over Green Brook?

It is owned by the State Highway Agency.