US Bridges

Pa 643 over I-70

Fair

Fulton County, Pennsylvania · Over I-70 at Exit 156 · Structure no. 000000000017843

Built
1962
63 years old, rebuilt 2010
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
258 ft
2 main spans
Daily traffic
265
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 643 over I-70 is a steel continuous stringer/multi-beam or girder carrying Pa 643 over I-70 in Fulton County, Pennsylvania. It was built in 1962 and reconstructed in 2010, so it is 63 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 265 vehicles a day, roughly 7% of them trucks, projected to reach 741 by 2032. The structure is 258 ft (78.6 m) long and 33 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesPa 643
CrossesI-70
LocationOver I-70 at Exit 156
RouteState Highway 643
CountyFulton County
StatePennsylvania
Coordinates39.88552, -78.24433
Functional classRural Local

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 inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating69 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHL 93
Structure length258 ft (78.6 m)
Longest span84 ft (25.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic265 (2024)
Projected traffic741 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa 643 over I-70 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2010.

What condition is Pa 643 over I-70 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 July 2024.

How much traffic does Pa 643 over I-70 carry?

About 265 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Pa 643 over I-70?

The structure is 258 ft (78.6 m) long with a longest span of 84 ft (25.6 m) and a deck 33 ft wide.

Who owns Pa 643 over I-70?

It is owned by the State Highway Agency.