US Bridges

CR 518 over Branch of Stony Brook

Good

Mercer County, New Jersey · 1.1 Mile East of Rt. 31 · Structure no. 1100040

Built
1991
34 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
5,330
2023 count
Owner
County
County Highway Agency

About this bridge

CR 518 over Branch of Stony Brook is a concrete culvert carrying CR 518 over Branch of Stony Brook in Mercer County, New Jersey. It was built in 1991, so it is 34 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 5,330 vehicles a day, roughly 4% of them trucks, projected to reach 6,505 by 2043. The structure is 24 ft (7.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCR 518
CrossesBranch of Stony Brook
Location1.1 Mile East of Rt. 31
RouteCounty Highway 518
CountyMercer County
StateNew Jersey
Coordinates40.38571, -74.7981
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,330 (2023)
Projected traffic6,505 by 2043
Trucks4%
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 CR 518 over Branch of Stony Brook built?

It was built in 1991, making it 34 years old in 2025.

What condition is CR 518 over Branch of Stony 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 February 2023.

How much traffic does CR 518 over Branch of Stony Brook carry?

About 5,330 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is CR 518 over Branch of Stony Brook?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 44 ft wide.

Who owns CR 518 over Branch of Stony Brook?

It is owned by the County Highway Agency.