US Bridges

Nj 29 Ramp a over Assunpink Creek

Fair

Mercer County, New Jersey · 0.6 MI N. of US 1 JCT · Structure no. 1131157

Built
1969
56 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
86 ft
1 main span
Daily traffic
11,707
2024 count
Owner
State
State Highway Agency

About this bridge

Nj 29 Ramp a over Assunpink Creek is a steel stringer/multi-beam or girder carrying Nj 29 Ramp a over Assunpink Creek in Mercer County, New Jersey. It was built in 1969, so it is 56 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 11,707 vehicles a day, roughly 5% of them trucks, projected to reach 14,284 by 2044. The structure is 86 ft (26.2 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNj 29 Ramp a
CrossesAssunpink Creek
Location0.6 MI N. of US 1 JCT
RouteState Highway 29
CountyMercer County
StateNew Jersey
Coordinates40.21675, -74.77017
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length86 ft (26.2 m)
Longest span78 ft (23.8 m)
Deck width29 ft (8.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,707 (2024)
Projected traffic14,284 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Nj 29 Ramp a over Assunpink Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Nj 29 Ramp a over Assunpink Creek 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 April 2024.

How much traffic does Nj 29 Ramp a over Assunpink Creek carry?

About 11,707 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Nj 29 Ramp a over Assunpink Creek?

The structure is 86 ft (26.2 m) long with a longest span of 78 ft (23.8 m) and a deck 29 ft wide.

Who owns Nj 29 Ramp a over Assunpink Creek?

It is owned by the State Highway Agency.