US Bridges

West Airy Street over Markley St;septa;crk;rd

Poor

Montgomery County, Pennsylvania · Norristown 3367-E02 · Structure no. 000000000027703

Built
1977
48 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
529 ft
3 main spans
Daily traffic
7,164
2024 count
Owner
State
State Highway Agency

About this bridge

West Airy Street over Markley St;septa;crk;rd is a steel stringer/multi-beam or girder carrying West Airy Street over Markley St;septa;crk;rd in Montgomery County, Pennsylvania. It was built in 1977, so it is 48 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 7,164 vehicles a day, roughly 7% of them trucks, projected to reach 7,361 by 2032. The structure is 529 ft (161.2 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesWest Airy Street
CrossesMarkley St;septa;crk;rd
LocationNorristown 3367-E02
RouteState Highway 0
Coordinates40.1177, -75.34779
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length529 ft (161.2 m)
Longest span145 ft (44.2 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,164 (2024)
Projected traffic7,361 by 2032
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

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$948,000
NavigationNo navigation control on waterway

Frequently asked questions

When was West Airy Street over Markley St;septa;crk;rd built?

It was built in 1977, making it 48 years old in 2025.

What condition is West Airy Street over Markley St;septa;crk;rd in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does West Airy Street over Markley St;septa;crk;rd carry?

About 7,164 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is West Airy Street over Markley St;septa;crk;rd?

The structure is 529 ft (161.2 m) long with a longest span of 145 ft (44.2 m) and a deck 40 ft wide.

Who owns West Airy Street over Markley St;septa;crk;rd?

It is owned by the State Highway Agency.