US Bridges

Pa Tpk (I-476) over T-397

Good

Montgomery County, Pennsylvania · Near Lansdale Interchange · Structure no. 000000000055770

Built
2018
7 years old
Condition
Good
inspected June 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
103 ft
1 main span
Daily traffic
65,329
2004 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-476) over T-397 is a prestressed concrete stringer/multi-beam or girder carrying Pa Tpk (I-476) over T-397 in Montgomery County, Pennsylvania. It was built in 2018, so it is 7 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 65,329 vehicles a day, roughly 16% of them trucks, projected to reach 94,986 by 2030. The structure is 103 ft (31.4 m) long and 126 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesPa Tpk (I-476)
CrossesT-397
LocationNear Lansdale Interchange
RouteInterstate 476
CountyMontgomery County
StatePennsylvania
Coordinates40.23722, -75.33958
Functional classRural 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 inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length103 ft (31.4 m)
Longest span101 ft (30.8 m)
Deck width126 ft (38.5 m)
Roadway width59 ft (18.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65,329 (2004)
Projected traffic94,986 by 2030
Trucks16%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa Tpk (I-476) over T-397 built?

It was built in 2018, making it 7 years old in 2025.

What condition is Pa Tpk (I-476) over T-397 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 June 2022.

How much traffic does Pa Tpk (I-476) over T-397 carry?

About 65,329 vehicles per day (2004 count), of which roughly 16% are trucks.

How long is Pa Tpk (I-476) over T-397?

The structure is 103 ft (31.4 m) long with a longest span of 101 ft (30.8 m) and a deck 126 ft wide.

Who owns Pa Tpk (I-476) over T-397?

It is owned by the State Toll Authority.