US Bridges

SR0422 over Mulligan Run

Fair

Butler County, Pennsylvania · East of Prospect · Structure no. 000000000007948

Built
1948
77 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
19,233
2024 count
Owner
State
State Highway Agency

About this bridge

SR0422 over Mulligan Run is a concrete culvert carrying SR0422 over Mulligan Run in Butler County, Pennsylvania. It was built in 1948, so it is 77 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 6 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 19,233 vehicles a day, roughly 10% of them trucks, projected to reach 28,816 by 2032. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSR0422
CrossesMulligan Run
LocationEast of Prospect
RouteU.S. Route 422
CountyButler County
StatePennsylvania
Coordinates40.89377, -79.99952
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,233 (2024)
Projected traffic28,816 by 2032
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$206,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR0422 over Mulligan Run built?

It was built in 1948, making it 77 years old in 2025.

What condition is SR0422 over Mulligan 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 2023.

How much traffic does SR0422 over Mulligan Run carry?

About 19,233 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SR0422 over Mulligan Run?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns SR0422 over Mulligan Run?

It is owned by the State Highway Agency.