US Bridges

Noblestown RD over N.Branch Robinson Run

Fair

Allegheny County, Pennsylvania · Inter.W/ SR 0978 · Structure no. 000000000001774

Built
1921
104 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Concrete
Length
49 ft
1 main span
Daily traffic
1,444
2024 count
Owner
State
State Highway Agency

About this bridge

Noblestown RD over N.Branch Robinson Run is a concrete arch - deck carrying Noblestown RD over N.Branch Robinson Run in Allegheny County, Pennsylvania. It was built in 1921, so it is 104 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 1,444 vehicles a day, roughly 8% of them trucks, projected to reach 1,921 by 2032. The structure is 49 ft (14.9 m) long and 49 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNoblestown RD
CrossesN.Branch Robinson Run
LocationInter.W/ SR 0978
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.39773, -80.18486
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span49 ft (14.9 m)
Deck width49 ft (14.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,444 (2024)
Projected traffic1,921 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$82,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Noblestown RD over N.Branch Robinson Run built?

It was built in 1921, making it 104 years old in 2025.

What condition is Noblestown RD over N.Branch 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 March 2023.

How much traffic does Noblestown RD over N.Branch Robinson Run carry?

About 1,444 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Noblestown RD over N.Branch Robinson Run?

The structure is 49 ft (14.9 m) long with a longest span of 49 ft (14.9 m) and a deck 49 ft wide.

Who owns Noblestown RD over N.Branch Robinson Run?

It is owned by the State Highway Agency.