US Bridges

Schuylkill Expway. over Norfolk Southern

Fair

Montgomery County, Pennsylvania · Flat Rock Tunnel 36D10 · Structure no. 000000000027269

Built
1985
40 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
100 ft
1 main span
Daily traffic
96,360
2024 count
Owner
State
State Highway Agency

About this bridge

Schuylkill Expway. over Norfolk Southern is a concrete culvert carrying Schuylkill Expway. over Norfolk Southern in Montgomery County, Pennsylvania. It was built in 1985, so it is 40 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 96,360 vehicles a day, roughly 7% of them trucks, projected to reach 122,890 by 2032. The structure is 100 ft (30.5 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSchuylkill Expway.
CrossesNorfolk Southern
LocationFlat Rock Tunnel 36D10
RouteInterstate 76
CountyMontgomery County
StatePennsylvania
Coordinates40.03643, -75.24537
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101 US tons
Inventory rating60 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length100 ft (30.5 m)
Longest span100 ft (30.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96,360 (2024)
Projected traffic122,890 by 2032
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Schuylkill Expway. over Norfolk Southern built?

It was built in 1985, making it 40 years old in 2025.

What condition is Schuylkill Expway. over Norfolk Southern 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 Schuylkill Expway. over Norfolk Southern carry?

About 96,360 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Schuylkill Expway. over Norfolk Southern?

The structure is 100 ft (30.5 m) long with a longest span of 100 ft (30.5 m).

Who owns Schuylkill Expway. over Norfolk Southern?

It is owned by the State Highway Agency.