US Bridges

Babcock Bl over Girtys Run

Fair

Allegheny County, Pennsylvania · 520 N.E. of SR 4009 · Structure no. 000000000001932

Built
1926
99 years old, rebuilt 1997
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
14,237
2023 count
Owner
State
State Highway Agency

About this bridge

Babcock Bl over Girtys Run is a prestressed concrete box beam or girders - multiple carrying Babcock Bl over Girtys Run in Allegheny County, Pennsylvania. It was built in 1926 and reconstructed in 1997, so it is 99 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 14,237 vehicles a day, roughly 3% of them trucks, projected to reach 19,330 by 2032. The structure is 34 ft (10.4 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBabcock Bl
CrossesGirtys Run
Location520 N.E. of SR 4009
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.50688, -79.98927
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.1 US tons
Inventory rating37 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,237 (2023)
Projected traffic19,330 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Babcock Bl over Girtys Run built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1997.

What condition is Babcock Bl 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 February 2024.

How much traffic does Babcock Bl over Girtys Run carry?

About 14,237 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Babcock Bl over Girtys Run?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 44 ft wide.

Who owns Babcock Bl over Girtys Run?

It is owned by the State Highway Agency.