US Bridges

I-279 NB over Various City Streets

Fair

Allegheny County, Pennsylvania · Fort Duquesne Bridge · Structure no. 000000000001030

Built
1986
39 years old, rebuilt 2018
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
2,234 ft
3 main spans
Daily traffic
10,891
2024 count
Owner
State
State Highway Agency

About this bridge

I-279 NB over Various City Streets is a steel continuous box beam or girders - multiple carrying I-279 NB over Various City Streets in Allegheny County, Pennsylvania. It was built in 1986 and reconstructed in 2018, so it is 39 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 10,891 vehicles a day, roughly 4% of them trucks, projected to reach 18,512 by 2032. The structure is 2,234 ft (680.9 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-279 NB
CrossesVarious City Streets
LocationFort Duquesne Bridge
RouteInterstate 279
CountyAllegheny County
StatePennsylvania
Coordinates40.46667, -80.01667
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating33 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+20 approach)
Design loadHS 20
Structure length2,234 ft (680.9 m)
Longest span117 ft (35.7 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,891 (2024)
Projected traffic18,512 by 2032
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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-279 NB over Various City Streets built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 2018.

What condition is I-279 NB over Various City Streets 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-279 NB over Various City Streets carry?

About 10,891 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is I-279 NB over Various City Streets?

The structure is 2,234 ft (680.9 m) long with a longest span of 117 ft (35.7 m) and a deck 44 ft wide.

Who owns I-279 NB over Various City Streets?

It is owned by the State Highway Agency.