US Bridges

Mid-County Exwy.Nb over Schuylkill R Rds Nsrc

Fair

Montgomery County, Pennsylvania · W. Conshohocken 3367J08 · Structure no. 000000000027473

Built
1974
51 years old, rebuilt 2011
Condition
Fair
inspected August 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
1,942 ft
8 main spans
Daily traffic
57,500
2024 count
Owner
State
State Highway Agency

About this bridge

Mid-County Exwy.Nb over Schuylkill R Rds Nsrc is a steel continuous girder and floorbeam system carrying Mid-County Exwy.Nb over Schuylkill R Rds Nsrc in Montgomery County, Pennsylvania. It was built in 1974 and reconstructed in 2011, so it is 51 years old, younger 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 57,500 vehicles a day, roughly 9% of them trucks, projected to reach 92,978 by 2032. The structure is 1,942 ft (591.9 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMid-County Exwy.Nb
CrossesSchuylkill R Rds Nsrc
LocationW. Conshohocken 3367J08
RouteInterstate 476
Coordinates40.07773, -75.31846
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating36.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8 (+6 approach)
Design loadHL 93
Structure length1,942 ft (591.9 m)
Longest span189 ft (57.6 m)
Deck width56 ft (17.1 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,500 (2024)
Projected traffic92,978 by 2032
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$13.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mid-County Exwy.Nb over Schuylkill R Rds Nsrc built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2011.

What condition is Mid-County Exwy.Nb over Schuylkill R Rds Nsrc 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 August 2023.

How much traffic does Mid-County Exwy.Nb over Schuylkill R Rds Nsrc carry?

About 57,500 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Mid-County Exwy.Nb over Schuylkill R Rds Nsrc?

The structure is 1,942 ft (591.9 m) long with a longest span of 189 ft (57.6 m) and a deck 56 ft wide.

Who owns Mid-County Exwy.Nb over Schuylkill R Rds Nsrc?

It is owned by the State Highway Agency.