US Bridges

Main St. over Spruce Run

Fair

Hunterdon County, New Jersey · 0.31 Mi. N of Nj 31 · Structure no. 1000072

Built
1930
95 years old, rebuilt 1960
Condition
Fair
inspected April 2023
Type
Arch - Deck
Concrete
Length
60 ft
1 main span
Daily traffic
160
2023 count
Owner
County
County Highway Agency

About this bridge

Main St. over Spruce Run is a concrete arch - deck carrying Main St. over Spruce Run in Hunterdon County, New Jersey. It was built in 1930 and reconstructed in 1960, so it is 95 years old, older 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 160 vehicles a day, roughly 3% of them trucks, projected to reach 195 by 2043. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain St.
CrossesSpruce Run
Location0.31 Mi. N of Nj 31
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.69122, -74.93689
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span60 ft (18.3 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic195 by 2043
Trucks3%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main St. over Spruce Run built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1960.

What condition is Main St. 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. over Spruce Run carry?

About 160 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Main St. over Spruce Run?

The structure is 60 ft (18.3 m) long with a longest span of 60 ft (18.3 m) and a deck 25 ft wide.

Who owns Main St. over Spruce Run?

It is owned by the County Highway Agency.