US Bridges

SR 79 NB over Over West 21st Street

Fair

Erie County, Pennsylvania · City of Erie · Structure no. 000000000015982

Built
1982
43 years old, rebuilt 2011
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
152 ft
3 main spans
Daily traffic
9,529
2024 count
Owner
State
State Highway Agency

About this bridge

SR 79 NB over Over West 21st Street is a prestressed concrete box beam or girders - multiple carrying SR 79 NB over Over West 21st Street in Erie County, Pennsylvania. It was built in 1982 and reconstructed in 2011, so it is 43 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 9,529 vehicles a day, roughly 7% of them trucks, projected to reach 21,053 by 2032. The structure is 152 ft (46.3 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 79 NB
CrossesOver West 21st Street
LocationCity of Erie
RouteInterstate 79
CountyErie County
StatePennsylvania
Coordinates42.09929, -80.12179
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating47 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span70 ft (21.3 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,529 (2024)
Projected traffic21,053 by 2032
Trucks7%
Lanes on structure3
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$531,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 79 NB over Over West 21st Street built?

It was built in 1982, making it 43 years old in 2025. It was reconstructed in 2011.

What condition is SR 79 NB over Over West 21st 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 September 2023.

How much traffic does SR 79 NB over Over West 21st Street carry?

About 9,529 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SR 79 NB over Over West 21st Street?

The structure is 152 ft (46.3 m) long with a longest span of 70 ft (21.3 m) and a deck 55 ft wide.

Who owns SR 79 NB over Over West 21st Street?

It is owned by the State Highway Agency.