US Bridges

Stiles Road over Stony Brook

Fair

Somerset County, New Jersey · .1 MI N of Stirling RD · Structure no. 18L1015

Built
1998
27 years old
Condition
Fair
inspected August 2023
Type
Slab
Wood or Timber
Length
26 ft
1 main span
Daily traffic
405
2023 count
Owner
County
County Highway Agency

About this bridge

Stiles Road over Stony Brook is a wood or timber slab carrying Stiles Road over Stony Brook in Somerset County, New Jersey. It was built in 1998, so it is 27 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 405 vehicles a day, roughly 1% of them trucks, projected to reach 494 by 2043. The structure is 26 ft (7.9 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesStiles Road
CrossesStony Brook
Location.1 MI N of Stirling RD
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.64355, -74.46907
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating99 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic405 (2023)
Projected traffic494 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Stiles Road over Stony Brook built?

It was built in 1998, making it 27 years old in 2025.

What condition is Stiles Road over Stony 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 August 2023.

How much traffic does Stiles Road over Stony Brook carry?

About 405 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Stiles Road over Stony Brook?

The structure is 26 ft (7.9 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns Stiles Road over Stony Brook?

It is owned by the County Highway Agency.