US Bridges

T-431 Whitestown over Semiconon Run

Fair

Butler County, Pennsylvania · Btw SR0528 & SR3029 · Structure no. 000000000008217

Built
1970
55 years old, rebuilt 1994
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
200
2015 count
Owner
County
County Highway Agency

About this bridge

T-431 Whitestown over Semiconon Run is a steel stringer/multi-beam or girder carrying T-431 Whitestown over Semiconon Run in Butler County, Pennsylvania. It was built in 1970 and reconstructed in 1994, so it is 55 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 200 vehicles a day, roughly 9% of them trucks, projected to reach 225 by 2035. The structure is 40 ft (12.2 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesT-431 Whitestown
CrossesSemiconon Run
LocationBtw SR0528 & SR3029
RouteCity Street 0
CountyButler County
StatePennsylvania
Coordinates40.87123, -80.02351
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2015)
Projected traffic225 by 2035
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-431 Whitestown over Semiconon Run built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1994.

What condition is T-431 Whitestown over Semiconon 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 July 2023.

How much traffic does T-431 Whitestown over Semiconon Run carry?

About 200 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is T-431 Whitestown over Semiconon Run?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 22 ft wide.

Who owns T-431 Whitestown over Semiconon Run?

It is owned by the County Highway Agency.