US Bridges

Frey RD over Thompson Run

Poor

Allegheny County, Pennsylvania · 150 West of SR 2065 · Structure no. 000000000001596

Built
1906
119 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
1,997
2024 count
Owner
State
State Highway Agency

About this bridge

Frey RD over Thompson Run is a steel stringer/multi-beam or girder carrying Frey RD over Thompson Run in Allegheny County, Pennsylvania. It was built in 1906, so it is 119 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,997 vehicles a day, roughly 6% of them trucks, projected to reach 3,058 by 2032. The structure is 26 ft (7.9 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFrey RD
CrossesThompson Run
Location150 West of SR 2065
RouteState Highway 0
Coordinates40.44868, -79.79665
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating91.1 US tons
Inventory rating54 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span21 ft (6.4 m)
Deck width21 ft (6.3 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,997 (2024)
Projected traffic3,058 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$161,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Frey RD over Thompson Run built?

It was built in 1906, making it 119 years old in 2025.

What condition is Frey RD over Thompson Run in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does Frey RD over Thompson Run carry?

About 1,997 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Frey RD over Thompson Run?

The structure is 26 ft (7.9 m) long with a longest span of 21 ft (6.4 m) and a deck 21 ft wide.

Who owns Frey RD over Thompson Run?

It is owned by the State Highway Agency.