US Bridges

Main ST (cr 628) over Spruce Run

Fair

Hunterdon County, New Jersey · 0.34 MI S. of Nj 31 JCT · Structure no. 1000071

Built
1995
30 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
878
2023 count
Owner
County
County Highway Agency

About this bridge

Main ST (cr 628) over Spruce Run is a prestressed concrete box beam or girders - multiple carrying Main ST (cr 628) over Spruce Run in Hunterdon County, New Jersey. It was built in 1995, so it is 30 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 878 vehicles a day, roughly 3% of them trucks, projected to reach 1,072 by 2043. The structure is 67 ft (20.4 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain ST (cr 628)
CrossesSpruce Run
Location0.34 MI S. of Nj 31 JCT
RouteCity Street 628
CountyHunterdon County
StateNew Jersey
Coordinates40.70225, -74.9441
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span62 ft (18.9 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic878 (2023)
Projected traffic1,072 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 Main ST (cr 628) over Spruce Run built?

It was built in 1995, making it 30 years old in 2025.

What condition is Main ST (cr 628) over Spruce Run 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 2023.

How much traffic does Main ST (cr 628) over Spruce Run carry?

About 878 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Main ST (cr 628) over Spruce Run?

The structure is 67 ft (20.4 m) long with a longest span of 62 ft (18.9 m) and a deck 35 ft wide.

Who owns Main ST (cr 628) over Spruce Run?

It is owned by the County Highway Agency.