US Bridges

T-579 Hoon Road over Connoquenessing CR

Fair

Butler County, Pennsylvania · 250 SE of SR 0038 · Structure no. 000000000008169

Built
1910
115 years old, rebuilt 2006
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
100
2015 count
Owner
County
County Highway Agency

About this bridge

T-579 Hoon Road over Connoquenessing CR is a steel stringer/multi-beam or girder carrying T-579 Hoon Road over Connoquenessing CR in Butler County, Pennsylvania. It was built in 1910 and reconstructed in 2006, so it is 115 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 100 vehicles a day, roughly 9% of them trucks, projected to reach 120 by 2035. The structure is 60 ft (18.3 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesT-579 Hoon Road
CrossesConnoquenessing CR
Location250 SE of SR 0038
RouteCity Street 0
CountyButler County
StatePennsylvania
Coordinates40.92244, -79.87755
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span56 ft (17.1 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2015)
Projected traffic120 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$404,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-579 Hoon Road over Connoquenessing CR built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 2006.

What condition is T-579 Hoon Road over Connoquenessing CR 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 November 2023.

How much traffic does T-579 Hoon Road over Connoquenessing CR carry?

About 100 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is T-579 Hoon Road over Connoquenessing CR?

The structure is 60 ft (18.3 m) long with a longest span of 56 ft (17.1 m) and a deck 18 ft wide.

Who owns T-579 Hoon Road over Connoquenessing CR?

It is owned by the County Highway Agency.