US Bridges

Ramp B (nb) over Ramp C (wb) on Rmp

Fair

Montgomery County, Pennsylvania · City Line Interch 3479-G9 · Structure no. 000000000028287

Built
1953
72 years old, rebuilt 1986
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
1 main span
Daily traffic
6,992
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp B (nb) over Ramp C (wb) on Rmp is a steel stringer/multi-beam or girder carrying Ramp B (nb) over Ramp C (wb) on Rmp in Montgomery County, Pennsylvania. It was built in 1953 and reconstructed in 1986, so it is 72 years old, older 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 5 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 6,992 vehicles a day, roughly 7% of them trucks, projected to reach 4,362 by 2032. The structure is 81 ft (24.7 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRamp B (nb)
CrossesRamp C (wb) on Rmp
LocationCity Line Interch 3479-G9
RouteState Highway 0
CountyMontgomery County
StatePennsylvania
Coordinates40.01223, -75.21111
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating69 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length81 ft (24.7 m)
Longest span76 ft (23.2 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,992 (2024)
Projected traffic4,362 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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$103,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp B (nb) over Ramp C (wb) on Rmp built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1986.

What condition is Ramp B (nb) over Ramp C (wb) on Rmp 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 February 2023.

How much traffic does Ramp B (nb) over Ramp C (wb) on Rmp carry?

About 6,992 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Ramp B (nb) over Ramp C (wb) on Rmp?

The structure is 81 ft (24.7 m) long with a longest span of 76 ft (23.2 m) and a deck 33 ft wide.

Who owns Ramp B (nb) over Ramp C (wb) on Rmp?

It is owned by the State Highway Agency.