US Bridges

Pa Tpk (I-476) over SEPTA RR

Good

Montgomery County, Pennsylvania · Near Center Square · Structure no. 000000000052459

Built
2014
11 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
93 ft
1 main span
Daily traffic
25,172
2015 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-476) over SEPTA RR is a steel stringer/multi-beam or girder carrying Pa Tpk (I-476) over SEPTA RR in Montgomery County, Pennsylvania. It was built in 2014, so it is 11 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25,172 vehicles a day, roughly 2% of them trucks, projected to reach 30,714 by 2035. The structure is 93 ft (28.3 m) long and 126 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPa Tpk (I-476)
CrossesSEPTA RR
LocationNear Center Square
RouteInterstate 476
CountyMontgomery County
StatePennsylvania
Coordinates40.17544, -75.308
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating61.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length93 ft (28.3 m)
Longest span90 ft (27.4 m)
Deck width126 ft (38.4 m)
Roadway width116 ft (35.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,172 (2015)
Projected traffic30,714 by 2035
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollToll bridge
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 Pa Tpk (I-476) over SEPTA RR built?

It was built in 2014, making it 11 years old in 2025.

What condition is Pa Tpk (I-476) over SEPTA RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Pa Tpk (I-476) over SEPTA RR carry?

About 25,172 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Pa Tpk (I-476) over SEPTA RR?

The structure is 93 ft (28.3 m) long with a longest span of 90 ft (27.4 m) and a deck 126 ft wide.

Who owns Pa Tpk (I-476) over SEPTA RR?

It is owned by the State Toll Authority.