US Bridges

Pottstown By-Pass over Sprogles Run

Fair

Montgomery County, Pennsylvania · Sanatoga 3139C02 · Structure no. 000000000027416

Built
1965
60 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
42 ft
2 main spans
Daily traffic
59,904
2024 count
Owner
State
State Highway Agency

About this bridge

Pottstown By-Pass over Sprogles Run is a concrete culvert carrying Pottstown By-Pass over Sprogles Run in Montgomery County, Pennsylvania. It was built in 1965, so it is 60 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 59,904 vehicles a day, roughly 4% of them trucks, projected to reach 65,079 by 2032. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesPottstown By-Pass
CrossesSprogles Run
LocationSanatoga 3139C02
RouteU.S. Route 422
CountyMontgomery County
StatePennsylvania
Coordinates40.23978, -75.60932
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionAugust 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 rating46 US tons
Inventory rating28 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,904 (2024)
Projected traffic65,079 by 2032
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Pottstown By-Pass over Sprogles Run built?

It was built in 1965, making it 60 years old in 2025.

What condition is Pottstown By-Pass over Sprogles 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 August 2023.

How much traffic does Pottstown By-Pass over Sprogles Run carry?

About 59,904 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Pottstown By-Pass over Sprogles Run?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.1 m).

Who owns Pottstown By-Pass over Sprogles Run?

It is owned by the State Highway Agency.