US Bridges

Pottstown By-Pass over Porter Road

Fair

Montgomery County, Pennsylvania · Sanatoga 3139-C02 · Structure no. 000000000027415

Built
1966
59 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
59,904
2024 count
Owner
State
State Highway Agency

About this bridge

Pottstown By-Pass over Porter Road is a prestressed concrete stringer/multi-beam or girder carrying Pottstown By-Pass over Porter Road in Montgomery County, Pennsylvania. It was built in 1966, so it is 59 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 46 ft (14 m) long and 88 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesPottstown By-Pass
CrossesPorter Road
LocationSanatoga 3139-C02
RouteU.S. Route 422
CountyMontgomery County
StatePennsylvania
Coordinates40.23964, -75.60956
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating78 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span44 ft (13.4 m)
Deck width88 ft (26.8 m)
Roadway width81 ft (24.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,904 (2024)
Projected traffic65,079 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pottstown By-Pass over Porter Road built?

It was built in 1966, making it 59 years old in 2025.

What condition is Pottstown By-Pass over Porter Road 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 May 2023.

How much traffic does Pottstown By-Pass over Porter Road carry?

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

How long is Pottstown By-Pass over Porter Road?

The structure is 46 ft (14 m) long with a longest span of 44 ft (13.4 m) and a deck 88 ft wide.

Who owns Pottstown By-Pass over Porter Road?

It is owned by the State Highway Agency.