US Bridges

Nj 29 NB over Assunpink Creek

Fair

Mercer County, New Jersey · 0.6 MI N of 1-29 JCT · Structure no. 1131155

Built
1969
56 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
109 ft
1 main span
Daily traffic
22,036
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 29 NB over Assunpink Creek is a steel stringer/multi-beam or girder carrying Nj 29 NB 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 22,036 vehicles a day, roughly 5% of them trucks, projected to reach 36,599 by 2042. The structure is 109 ft (33.2 m) long and 57 ft wide.

Location

Open in Google Maps
CarriesNj 29 NB
CrossesAssunpink Creek
Location0.6 MI N of 1-29 JCT
RouteState Highway 29
CountyMercer County
StateNew Jersey
Coordinates40.2171, -74.76957
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length109 ft (33.2 m)
Longest span108 ft (32.9 m)
Deck width57 ft (17.4 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,036 (2022)
Projected traffic36,599 by 2042
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 NB over Assunpink Creek built?

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

What condition is Nj 29 NB 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 June 2024.

How much traffic does Nj 29 NB over Assunpink Creek carry?

About 22,036 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Nj 29 NB over Assunpink Creek?

The structure is 109 ft (33.2 m) long with a longest span of 108 ft (32.9 m) and a deck 57 ft wide.

Who owns Nj 29 NB over Assunpink Creek?

It is owned by the State Highway Agency.