US Bridges

Pa Tpk (I-476) over T-400

Good

Montgomery County, Pennsylvania · W of Telford near Pa 563 · Structure no. 000000000067786

Built
2020
5 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
50,307
2020 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-476) over T-400 is a prestressed concrete box beam or girders - multiple carrying Pa Tpk (I-476) over T-400 in Montgomery County, Pennsylvania. It was built in 2020, so it is 5 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50,307 vehicles a day, roughly 15% of them trucks, projected to reach 78,780 by 2030. The structure is 33 ft (10.1 m) long and 125 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesPa Tpk (I-476)
CrossesT-400
LocationW of Telford near Pa 563
RouteInterstate 476
CountyMontgomery County
StatePennsylvania
Coordinates40.33207, -75.38145
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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width125 ft (38.2 m)
Roadway width118 ft (36.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,307 (2020)
Projected traffic78,780 by 2030
Trucks15%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a toll road
National Highway SystemYes

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-400 built?

It was built in 2020, making it 5 years old in 2025.

What condition is Pa Tpk (I-476) over T-400 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 September 2023.

How much traffic does Pa Tpk (I-476) over T-400 carry?

About 50,307 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Pa Tpk (I-476) over T-400?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 125 ft wide.

Who owns Pa Tpk (I-476) over T-400?

It is owned by the State Toll Authority.