Structure 38943 · Philadelphia County, PA

Ridge Avenue over Amtrak Main Line N-s

Carries Ridge Avenue over Amtrak Main Line N-s, .1mi Se.29th St. 3590b03.

Overall conditionPoor

Set by its lowest-rated component: Deck at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructure4/9 · Poor
Substructure4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT113 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 4/9Substructure 4/9

113 ft end to end, longest span 59 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1918108 years old
Length112.9 ft34.4 m
Daily traffic9,941counted 2024
Last inspectedJune 2024every 24 months

Location

StatePennsylvania
CountyPhiladelphia
Location.1mi Se.29th St. 3590b03
CarriesRidge Avenue
CrossesAmtrak Main Line N-s
Coordinates39.98581, -75.17956

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length112.9 ft (34.4 m)
Max Span59.1 ft (18 m)
Deck Width57.4 ft (17.5 m)
Deck Area602 sq m
Main Spans3
Year Built1918

Traffic

Avg Daily Traffic9,941 (2024)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerRailroad
Historical SignificanceBridge is eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000038943

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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