US Bridges

Carnegie Road over Assunpink Creek

Good

Mercer County, New Jersey · 0.46 MI South of Route 1 · Structure no. 1165404

Built
2011
14 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
795
2023 count
Owner
County
County Highway Agency

About this bridge

Carnegie Road over Assunpink Creek is a prestressed concrete box beam or girders - multiple carrying Carnegie Road over Assunpink Creek in Mercer County, New Jersey. It was built in 2011, so it is 14 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 795 vehicles a day, roughly 3% of them trucks, projected to reach 970 by 2043. The structure is 76 ft (23.2 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCarnegie Road
CrossesAssunpink Creek
Location0.46 MI South of Route 1
RouteCity Street 0
Coordinates40.26415, -74.7114
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating101.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length76 ft (23.2 m)
Longest span69 ft (21 m)
Deck width41 ft (12.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic795 (2023)
Projected traffic970 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 Carnegie Road over Assunpink Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Carnegie Road over Assunpink Creek 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 May 2023.

How much traffic does Carnegie Road over Assunpink Creek carry?

About 795 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Carnegie Road over Assunpink Creek?

The structure is 76 ft (23.2 m) long with a longest span of 69 ft (21 m) and a deck 41 ft wide.

Who owns Carnegie Road over Assunpink Creek?

It is owned by the County Highway Agency.