US Bridges

Rp M(I-476)MCB-105 over Pa TPK(I-276)

Good

Montgomery County, Pennsylvania · Mid-County Interchange · Structure no. 000000000028170

Built
1992
33 years old
Condition
Good
inspected June 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
275 ft
4 main spans
Daily traffic
23,886
1993 count
Owner
Toll Authority
State Toll Authority

About this bridge

Rp M(I-476)MCB-105 over Pa TPK(I-276) is a steel continuous stringer/multi-beam or girder carrying Rp M(I-476)MCB-105 over Pa TPK(I-276) in Montgomery County, Pennsylvania. It was built in 1992, so it is 33 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 23,886 vehicles a day, roughly 6% of them trucks, projected to reach 39,088 by 2030. The structure is 275 ft (83.8 m) long and 67 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRp M(I-476)MCB-105
CrossesPa TPK(I-276)
LocationMid-County Interchange
RouteInterstate 476
CountyMontgomery County
StatePennsylvania
Coordinates40.11269, -75.27788
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2022
Inspection intervalevery 48 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 rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length275 ft (83.8 m)
Longest span89 ft (27.1 m)
Deck width67 ft (20.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,886 (1993)
Projected traffic39,088 by 2030
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Rp M(I-476)MCB-105 over Pa TPK(I-276) built?

It was built in 1992, making it 33 years old in 2025.

What condition is Rp M(I-476)MCB-105 over Pa TPK(I-276) 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 Rp M(I-476)MCB-105 over Pa TPK(I-276) carry?

About 23,886 vehicles per day (1993 count), of which roughly 6% are trucks.

How long is Rp M(I-476)MCB-105 over Pa TPK(I-276)?

The structure is 275 ft (83.8 m) long with a longest span of 89 ft (27.1 m) and a deck 67 ft wide.

Who owns Rp M(I-476)MCB-105 over Pa TPK(I-276)?

It is owned by the State Toll Authority.