US Bridges

I-78(LR 1045) over Pa 100(LR 672)

Fair

Lehigh County, Pennsylvania · Fogelsville Interchange · Structure no. 000000000022999

Built
1958
67 years old, rebuilt 1988
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
123 ft
3 main spans
Daily traffic
126,705
2024 count
Owner
State
State Highway Agency

About this bridge

I-78(LR 1045) over Pa 100(LR 672) is a steel stringer/multi-beam or girder carrying I-78(LR 1045) over Pa 100(LR 672) in Lehigh County, Pennsylvania. It was built in 1958 and reconstructed in 1988, so it is 67 years old, older 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 5 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 126,705 vehicles a day, roughly 24% of them trucks, projected to reach 102,256 by 2032. The structure is 123 ft (37.5 m) long and 123 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-78(LR 1045)
CrossesPa 100(LR 672)
LocationFogelsville Interchange
RouteInterstate 78
CountyLehigh County
StatePennsylvania
Coordinates40.57988, -75.62419
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length123 ft (37.5 m)
Longest span70 ft (21.3 m)
Deck width123 ft (37.6 m)
Roadway width117 ft (35.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic126,705 (2024)
Projected traffic102,256 by 2032
Trucks24%
Lanes on structure6
Traffic directionTwo-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-78(LR 1045) over Pa 100(LR 672) built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1988.

What condition is I-78(LR 1045) over Pa 100(LR 672) 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 September 2023.

How much traffic does I-78(LR 1045) over Pa 100(LR 672) carry?

About 126,705 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is I-78(LR 1045) over Pa 100(LR 672)?

The structure is 123 ft (37.5 m) long with a longest span of 70 ft (21.3 m) and a deck 123 ft wide.

Who owns I-78(LR 1045) over Pa 100(LR 672)?

It is owned by the State Highway Agency.