US Bridges

Noblestown Road over Robinson Run

Fair

Allegheny County, Pennsylvania · At I-79 Interchange · Structure no. 000000000001782

Built
1972
53 years old, rebuilt 2021
Condition
Fair
inspected October 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
302 ft
3 main spans
Daily traffic
11,259
2024 count
Owner
State
State Highway Agency

About this bridge

Noblestown Road over Robinson Run is a steel stringer/multi-beam or girder carrying Noblestown Road over Robinson Run in Allegheny County, Pennsylvania. It was built in 1972 and reconstructed in 2021, so it is 53 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 11,259 vehicles a day, roughly 6% of them trucks, projected to reach 11,640 by 2039. The structure is 302 ft (92 m) long and 77 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNoblestown Road
CrossesRobinson Run
LocationAt I-79 Interchange
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.39928, -80.10317
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length302 ft (92 m)
Longest span134 ft (40.8 m)
Deck width77 ft (23.6 m)
Roadway width73 ft (22.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,259 (2024)
Projected traffic11,640 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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$3.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Noblestown Road over Robinson Run built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2021.

What condition is Noblestown Road over Robinson 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 October 2022.

How much traffic does Noblestown Road over Robinson Run carry?

About 11,259 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Noblestown Road over Robinson Run?

The structure is 302 ft (92 m) long with a longest span of 134 ft (40.8 m) and a deck 77 ft wide.

Who owns Noblestown Road over Robinson Run?

It is owned by the State Highway Agency.