US Bridges

North Av over Girtys Run

Fair

Allegheny County, Pennsylvania · 445003 at Frederick ST · Structure no. 000000000002617

Built
1911
114 years old, rebuilt 1994
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
1 main span
Daily traffic
2,500
2005 count
Owner
City
City or Municipal Highway Agency

About this bridge

North Av over Girtys Run is a steel stringer/multi-beam or girder carrying North Av over Girtys Run in Allegheny County, Pennsylvania. It was built in 1911 and reconstructed in 1994, so it is 114 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 2,500 vehicles a day, roughly 6% of them trucks, projected to reach 5,500 by 2030. The structure is 39 ft (11.9 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNorth Av
CrossesGirtys Run
Location445003 at Frederick ST
RouteCity Street 0
CountyAllegheny County
StatePennsylvania
Coordinates40.48804, -79.97327
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length39 ft (11.9 m)
Longest span36 ft (11 m)
Deck width59 ft (18.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2005)
Projected traffic5,500 by 2030
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was North Av over Girtys Run built?

It was built in 1911, making it 114 years old in 2025. It was reconstructed in 1994.

What condition is North Av over Girtys Run 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 April 2023.

How much traffic does North Av over Girtys Run carry?

About 2,500 vehicles per day (2005 count), of which roughly 6% are trucks.

How long is North Av over Girtys Run?

The structure is 39 ft (11.9 m) long with a longest span of 36 ft (11 m) and a deck 59 ft wide.

Who owns North Av over Girtys Run?

It is owned by the City or Municipal Highway Agency.