US Bridges

Killarney Rd. over Mill Run

Fair

Fayette County, Pennsylvania · Mill Run Junction · Structure no. 000000000017139

Built
1918
107 years old, rebuilt 2001
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

Killarney Rd. over Mill Run is a steel stringer/multi-beam or girder carrying Killarney Rd. over Mill Run in Fayette County, Pennsylvania. It was built in 1918 and reconstructed in 2001, so it is 107 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, projected to reach 140 by 2026. The structure is 32 ft (9.8 m) long and 14 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesKillarney Rd.
CrossesMill Run
LocationMill Run Junction
RouteCity Street 0T597
CountyFayette County
StatePennsylvania
Coordinates39.97098, -79.46235
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.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 25 or greater
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width14 ft (4.4 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic140 by 2026
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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$54,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Killarney Rd. over Mill Run built?

It was built in 1918, making it 107 years old in 2025. It was reconstructed in 2001.

What condition is Killarney Rd. over Mill 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 September 2023.

How much traffic does Killarney Rd. over Mill Run carry?

About 100 vehicles per day (2019 count).

How long is Killarney Rd. over Mill Run?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 14 ft wide.

Who owns Killarney Rd. over Mill Run?

It is owned by the County Highway Agency.