US Bridges

Main Street over Peapack Brook

Good

Somerset County, New Jersey · North of Dewey Avenue · Structure no. 18D1306

Built
2012
13 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
2,216
2023 count
Owner
County
County Highway Agency

About this bridge

Main Street over Peapack Brook is a steel stringer/multi-beam or girder carrying Main Street over Peapack Brook in Somerset County, New Jersey. It was built in 2012, so it is 13 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 2,216 vehicles a day, roughly 3% of them trucks, projected to reach 2,659 by 2043. The structure is 56 ft (17.1 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMain Street
CrossesPeapack Brook
LocationNorth of Dewey Avenue
RouteCounty Highway 671
Coordinates40.72248, -74.6678
Functional classUrban Collector

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.
Substructure8 Very GoodNo problems noted.
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 evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating81 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length56 ft (17.1 m)
Longest span50 ft (15.2 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,216 (2023)
Projected traffic2,659 by 2043
Trucks3%
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 Main Street over Peapack Brook built?

It was built in 2012, making it 13 years old in 2025.

What condition is Main Street over Peapack 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 October 2023.

How much traffic does Main Street over Peapack Brook carry?

About 2,216 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Main Street over Peapack Brook?

The structure is 56 ft (17.1 m) long with a longest span of 50 ft (15.2 m) and a deck 39 ft wide.

Who owns Main Street over Peapack Brook?

It is owned by the County Highway Agency.