US Bridges

SR 120-PA 120 over Mill Run

Fair

Clinton County, Pennsylvania · Glen Union · Structure no. 000000000012113

Built
1928
97 years old, rebuilt 1968
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
2,180
2024 count
Owner
State
State Highway Agency

About this bridge

SR 120-PA 120 over Mill Run is a concrete culvert carrying SR 120-PA 120 over Mill Run in Clinton County, Pennsylvania. It was built in 1928 and reconstructed in 1968, so it is 97 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 2,180 vehicles a day, roughly 21% of them trucks, projected to reach 2,192 by 2044. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSR 120-PA 120
CrossesMill Run
LocationGlen Union
RouteState Highway 120
CountyClinton County
StatePennsylvania
Coordinates41.24986, -77.61017
Functional classRural Minor 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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
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 traffic2,180 (2024)
Projected traffic2,192 by 2044
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 120-PA 120 over Mill Run built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1968.

What condition is SR 120-PA 120 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 October 2024.

How much traffic does SR 120-PA 120 over Mill Run carry?

About 2,180 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is SR 120-PA 120 over Mill Run?

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

Who owns SR 120-PA 120 over Mill Run?

It is owned by the State Highway Agency.