US Bridges

Tri Boro Expy over Thompson Run

Fair

Allegheny County, Pennsylvania · Turtle Creek · Structure no. 000000000000938

Built
1965
60 years old
Condition
Fair
inspected December 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
10,576
2024 count
Owner
State
State Highway Agency

About this bridge

Tri Boro Expy over Thompson Run is a prestressed concrete box beam or girders - multiple carrying Tri Boro Expy over Thompson Run in Allegheny County, Pennsylvania. It was built in 1965, so it is 60 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 10,576 vehicles a day, roughly 6% of them trucks, projected to reach 12,022 by 2032. The structure is 65 ft (19.8 m) long and 84 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTri Boro Expy
CrossesThompson Run
LocationTurtle Creek
RouteState Highway 130
CountyAllegheny County
StatePennsylvania
Coordinates40.40632, -79.82656
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating91.1 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span63 ft (19.2 m)
Deck width84 ft (25.6 m)
Roadway width75 ft (22.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,576 (2024)
Projected traffic12,022 by 2032
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Tri Boro Expy over Thompson Run built?

It was built in 1965, making it 60 years old in 2025.

What condition is Tri Boro Expy over Thompson 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 December 2022.

How much traffic does Tri Boro Expy over Thompson Run carry?

About 10,576 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Tri Boro Expy over Thompson Run?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 84 ft wide.

Who owns Tri Boro Expy over Thompson Run?

It is owned by the State Highway Agency.