US Bridges

I-79 SB over Over T-528 Mercer Pike

Fair

Crawford County, Pennsylvania · Greenwood Township · Structure no. 000000000012980

Built
1969
56 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
135 ft
3 main spans
Daily traffic
6,474
2023 count
Owner
State
State Highway Agency

About this bridge

I-79 SB over Over T-528 Mercer Pike is a prestressed concrete box beam or girders - multiple carrying I-79 SB over Over T-528 Mercer Pike in Crawford County, Pennsylvania. It was built in 1969, so it is 56 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 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 6,474 vehicles a day, roughly 24% of them trucks, projected to reach 11,306 by 2032. The structure is 135 ft (41.1 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-79 SB
CrossesOver T-528 Mercer Pike
LocationGreenwood Township
RouteInterstate 79
CountyCrawford County
StatePennsylvania
Coordinates41.50555, -80.17094
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length135 ft (41.1 m)
Longest span47 ft (14.3 m)
Deck width46 ft (13.9 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,474 (2023)
Projected traffic11,306 by 2032
Trucks24%
Lanes on structure2
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$673,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-79 SB over Over T-528 Mercer Pike built?

It was built in 1969, making it 56 years old in 2025.

What condition is I-79 SB over Over T-528 Mercer Pike 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 March 2023.

How much traffic does I-79 SB over Over T-528 Mercer Pike carry?

About 6,474 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I-79 SB over Over T-528 Mercer Pike?

The structure is 135 ft (41.1 m) long with a longest span of 47 ft (14.3 m) and a deck 46 ft wide.

Who owns I-79 SB over Over T-528 Mercer Pike?

It is owned by the State Highway Agency.