US Bridges

SR 504-PA 504 over Six Mile Run

Fair

Centre County, Pennsylvania · Six Mile E. Philipsburg · Structure no. 000000000040185

Built
1998
27 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
42 ft
2 main spans
Daily traffic
558
2023 count
Owner
State
State Highway Agency

About this bridge

SR 504-PA 504 over Six Mile Run is a concrete culvert carrying SR 504-PA 504 over Six Mile Run in Centre County, Pennsylvania. It was built in 1998, so it is 27 years old, younger 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 558 vehicles a day, roughly 8% of them trucks, projected to reach 745 by 2043. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 44.1 mi (71 km).

Location

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CarriesSR 504-PA 504
CrossesSix Mile Run
LocationSix Mile E. Philipsburg
RouteState Highway 504
CountyCentre County
StatePennsylvania
Coordinates40.90897, -78.10453
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating105.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length42 ft (12.8 m)
Longest span19 ft (5.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic558 (2023)
Projected traffic745 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.1 mi (71 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 504-PA 504 over Six Mile Run built?

It was built in 1998, making it 27 years old in 2025.

What condition is SR 504-PA 504 over Six Mile 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 April 2023.

How much traffic does SR 504-PA 504 over Six Mile Run carry?

About 558 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 504-PA 504 over Six Mile Run?

The structure is 42 ft (12.8 m) long with a longest span of 19 ft (5.8 m).

Who owns SR 504-PA 504 over Six Mile Run?

It is owned by the State Highway Agency.