US Bridges

Babcock Bl over Girtys Run

Fair

Allegheny County, Pennsylvania · 1/2 Mi.N.W.Of SR 4002 · Structure no. 000000000001926

Built
1930
95 years old, rebuilt 2014
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
75 ft
1 main span
Daily traffic
13,030
2024 count
Owner
State
State Highway Agency

About this bridge

Babcock Bl over Girtys Run is a steel stringer/multi-beam or girder carrying Babcock Bl over Girtys Run in Allegheny County, Pennsylvania. It was built in 1930 and reconstructed in 2014, so it is 95 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 13,030 vehicles a day, roughly 6% of them trucks, projected to reach 17,328 by 2032. The structure is 75 ft (22.9 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesBabcock Bl
CrossesGirtys Run
Location1/2 Mi.N.W.Of SR 4002
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.50164, -79.98201
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
Deck8 Very GoodNo problems noted.
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; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating60.4 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length75 ft (22.9 m)
Longest span69 ft (21 m)
Deck width37 ft (11.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,030 (2024)
Projected traffic17,328 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$828,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Babcock Bl over Girtys Run built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2014.

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 13,030 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Babcock Bl over Girtys Run?

The structure is 75 ft (22.9 m) long with a longest span of 69 ft (21 m) and a deck 37 ft wide.

Who owns Babcock Bl over Girtys Run?

It is owned by the State Highway Agency.