US Bridges

I-78 EB over SR 611

Fair

Northampton County, Pennsylvania · 0.24 MI NW of Delaware R. · Structure no. 000000000045615

Built
1986
39 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
204 ft
3 main spans
Daily traffic
31,800
2022 count
Owner
Toll Authority
Local Toll Authority

About this bridge

I-78 EB over SR 611 is a prestressed concrete box beam or girders - multiple carrying I-78 EB over SR 611 in Northampton County, Pennsylvania. It was built in 1986, so it is 39 years old, younger than the Pennsylvania average of 54.8 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 31,800 vehicles a day, roughly 24% of them trucks, projected to reach 38,500 by 2042. The structure is 204 ft (62.2 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-78 EB
CrossesSR 611
Location0.24 MI NW of Delaware R.
RouteInterstate 78
CountyNorthampton County
StatePennsylvania
Coordinates40.6753, -75.1811
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
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 alignment7: Better than present minimum criteria
Operating rating78.6 US tons
Inventory rating60 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length204 ft (62.2 m)
Longest span69 ft (21 m)
Deck width52 ft (15.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,800 (2022)
Projected traffic38,500 by 2042
Trucks24%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollToll bridge
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
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-78 EB over SR 611 built?

It was built in 1986, making it 39 years old in 2025.

What condition is I-78 EB over SR 611 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 2023.

How much traffic does I-78 EB over SR 611 carry?

About 31,800 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I-78 EB over SR 611?

The structure is 204 ft (62.2 m) long with a longest span of 69 ft (21 m) and a deck 52 ft wide.

Who owns I-78 EB over SR 611?

It is owned by the Local Toll Authority.