US Bridges

Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR

Fair

Montgomery County, Pennsylvania · West Conshohocken 3367F09 · Structure no. 000000000027472

Built
1972
53 years old, rebuilt 2011
Condition
Fair
inspected April 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
605 ft
3 main spans
Daily traffic
58,479
2024 count
Owner
State
State Highway Agency

About this bridge

Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR is a steel continuous girder and floorbeam system carrying Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR in Montgomery County, Pennsylvania. It was built in 1972 and reconstructed in 2011, so it is 53 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 58,479 vehicles a day, roughly 9% of them trucks, projected to reach 93,194 by 2032. The structure is 605 ft (184.4 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMid-County Exwy-Sb
CrossesBalligomingo Rd/Gulph CR
LocationWest Conshohocken 3367F09
RouteInterstate 476
Coordinates40.07185, -75.3224
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating60 US tons
Inventory rating36 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length605 ft (184.4 m)
Longest span270 ft (82.3 m)
Deck width55 ft (16.9 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,479 (2024)
Projected traffic93,194 by 2032
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2011.

What condition is Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR 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 April 2023.

How much traffic does Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR carry?

About 58,479 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR?

The structure is 605 ft (184.4 m) long with a longest span of 270 ft (82.3 m) and a deck 55 ft wide.

Who owns Mid-County Exwy-Sb over Balligomingo Rd/Gulph CR?

It is owned by the State Highway Agency.