US Bridges

Sycamore Avenue over Green Brook

Fair

Somerset County, New Jersey · 0.1 MI W. of Nj Route 28 · Structure no. 18M0904

Built
1910
115 years old, rebuilt 2011
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
49 ft
1 main span
Daily traffic
568
2023 count
Owner
County
County Highway Agency

About this bridge

Sycamore Avenue over Green Brook is a steel stringer/multi-beam or girder carrying Sycamore Avenue over Green Brook in Somerset County, New Jersey. It was built in 1910 and reconstructed in 2011, so it is 115 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 568 vehicles a day, roughly 1% of them trucks, projected to reach 681 by 2043. The structure is 49 ft (14.9 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSycamore Avenue
CrossesGreen Brook
Location0.1 MI W. of Nj Route 28
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.61514, -74.43157
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width59 ft (18.1 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic568 (2023)
Projected traffic681 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sycamore Avenue over Green Brook built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 2011.

What condition is Sycamore Avenue 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 October 2023.

How much traffic does Sycamore Avenue over Green Brook carry?

About 568 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Sycamore Avenue over Green Brook?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 59 ft wide.

Who owns Sycamore Avenue over Green Brook?

It is owned by the County Highway Agency.