US Bridges

I-78WB(LR 1045) over Williams Street

Fair

Northampton County, Pennsylvania · I78 WB over Williams St. · Structure no. 000000000028533

Built
1988
37 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
30,149
2024 count
Owner
State
State Highway Agency

About this bridge

I-78WB(LR 1045) over Williams Street is a prestressed concrete stringer/multi-beam or girder carrying I-78WB(LR 1045) over Williams Street in Northampton County, Pennsylvania. It was built in 1988, so it is 37 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 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 30,149 vehicles a day, roughly 17% of them trucks, projected to reach 39,527 by 2032. The structure is 95 ft (29 m) long and 48 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesI-78WB(LR 1045)
CrossesWilliams Street
LocationI78 WB over Williams St.
RouteInterstate 78
CountyNorthampton County
StatePennsylvania
Coordinates40.5961, -75.35048
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 rating110.1 US tons
Inventory rating64 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length95 ft (29 m)
Longest span89 ft (27.1 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,149 (2024)
Projected traffic39,527 by 2032
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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-78WB(LR 1045) over Williams Street built?

It was built in 1988, making it 37 years old in 2025.

What condition is I-78WB(LR 1045) over Williams Street 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 October 2023.

How much traffic does I-78WB(LR 1045) over Williams Street carry?

About 30,149 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is I-78WB(LR 1045) over Williams Street?

The structure is 95 ft (29 m) long with a longest span of 89 ft (27.1 m) and a deck 48 ft wide.

Who owns I-78WB(LR 1045) over Williams Street?

It is owned by the State Highway Agency.