US Bridges

Union Av over Br.Robinson Run

Fair

Allegheny County, Pennsylvania · @ Inters.W\sr 3048 · Structure no. 000000000001349

Built
1925
100 years old
Condition
Fair
inspected October 2022
Type
Arch - Deck
Concrete
Length
55 ft
1 main span
Daily traffic
9,278
2024 count
Owner
State
State Highway Agency

About this bridge

Union Av over Br.Robinson Run is a concrete arch - deck carrying Union Av over Br.Robinson Run in Allegheny County, Pennsylvania. It was built in 1925, so it is 100 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 5 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 9,278 vehicles a day, roughly 6% of them trucks, projected to reach 5,819 by 2032. The structure is 55 ft (16.8 m) long and 49 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUnion Av
CrossesBr.Robinson Run
Location@ Inters.W\sr 3048
RouteState Highway 978
CountyAllegheny County
StatePennsylvania
Coordinates40.39754, -80.18502
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
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 length55 ft (16.8 m)
Longest span55 ft (16.8 m)
Deck width49 ft (14.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,278 (2024)
Projected traffic5,819 by 2032
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 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$125,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Union Av over Br.Robinson Run built?

It was built in 1925, making it 100 years old in 2025.

What condition is Union Av over Br.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 Union Av over Br.Robinson Run carry?

About 9,278 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Union Av over Br.Robinson Run?

The structure is 55 ft (16.8 m) long with a longest span of 55 ft (16.8 m) and a deck 49 ft wide.

Who owns Union Av over Br.Robinson Run?

It is owned by the State Highway Agency.