US Bridges

Thompson Run RD over Leak Run

Fair

Allegheny County, Pennsylvania · @ Intersection W/Sr 2261 · Structure no. 000000000001603

Built
1916
109 years old
Condition
Fair
inspected March 2024
Type
Arch - Deck
Concrete
Length
20 ft
1 main span
Daily traffic
5,157
2023 count
Owner
State
State Highway Agency

About this bridge

Thompson Run RD over Leak Run is a concrete arch - deck carrying Thompson Run RD over Leak Run in Allegheny County, Pennsylvania. It was built in 1916, so it is 109 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 5,157 vehicles a day, roughly 2% of them trucks, projected to reach 7,551 by 2032. The structure is 20 ft (6.1 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesThompson Run RD
CrossesLeak Run
Location@ Intersection W/Sr 2261
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.44362, -79.79699
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width24 ft (7.3 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,157 (2023)
Projected traffic7,551 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$147,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Thompson Run RD over Leak Run built?

It was built in 1916, making it 109 years old in 2025.

What condition is Thompson Run RD over Leak 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 2024.

How much traffic does Thompson Run RD over Leak Run carry?

About 5,157 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Thompson Run RD over Leak Run?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 24 ft wide.

Who owns Thompson Run RD over Leak Run?

It is owned by the State Highway Agency.