US Bridges

I-80 Eastbound over CR.521(BLAIRSTOWN Rd.)

Fair

Warren County, New Jersey · 8.1 MI East of RTE 46 · Structure no. 2115172

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
102 ft
1 main span
Daily traffic
26,180
2022 count
Owner
State
State Highway Agency

About this bridge

I-80 Eastbound over CR.521(BLAIRSTOWN Rd.) is a steel stringer/multi-beam or girder carrying I-80 Eastbound over CR.521(BLAIRSTOWN Rd.) in Warren County, New Jersey. It was built in 1970, so it is 55 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 26,180 vehicles a day, roughly 14% of them trucks, projected to reach 31,416 by 2042. The structure is 102 ft (31.1 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-80 Eastbound
CrossesCR.521(BLAIRSTOWN Rd.)
Location8.1 MI East of RTE 46
RouteInterstate 80
CountyWarren County
StateNew Jersey
Coordinates40.92414, -74.95976
Functional classRural Principal Arterial - Interstate

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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span98 ft (29.9 m)
Deck width63 ft (19.1 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,180 (2022)
Projected traffic31,416 by 2042
Trucks14%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-80 Eastbound over CR.521(BLAIRSTOWN Rd.) built?

It was built in 1970, making it 55 years old in 2025.

What condition is I-80 Eastbound over CR.521(BLAIRSTOWN Rd.) 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 August 2024.

How much traffic does I-80 Eastbound over CR.521(BLAIRSTOWN Rd.) carry?

About 26,180 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is I-80 Eastbound over CR.521(BLAIRSTOWN Rd.)?

The structure is 102 ft (31.1 m) long with a longest span of 98 ft (29.9 m) and a deck 63 ft wide.

Who owns I-80 Eastbound over CR.521(BLAIRSTOWN Rd.)?

It is owned by the State Highway Agency.