Structure 2708 · Allegheny County, PA

Spring Hill RD over N-s Rr/r-r St/creek

Carries Spring Hill RD over N-s Rr/r-r St/creek, P09203 Wall Borough.

Overall conditionPoor

Set by its lowest-rated component: Deck at 1 of 9.

How ratings work
Decksets the rating1/9 · Imminent Failure
Superstructure4/9 · Poor
Substructure2/9 · Critical
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT268 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 1/9 · sets the ratingSuperstructure 4/9Substructure 2/9

268 ft end to end, longest span 120 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck 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 girder bridge.

Built1915rebuilt 1972
Length268.0 ft81.7 m
Daily traffic2,002counted 2005
Last inspectedOctober 2023every 24 months

Location

StatePennsylvania
CountyAllegheny
LocationP09203 Wall Borough
CarriesSpring Hill RD
CrossesN-s Rr/r-r St/creek
Coordinates40.39400, -79.79802

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length268.0 ft (81.7 m)
Max Span120.1 ft (36.6 m)
Deck Width26.6 ft (8.1 m)
Deck Area661.8 sq m
Main Spans2
Year Built1915 (reconstructed 1972)

Traffic

Avg Daily Traffic2,002 (2005)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge1

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerRailroad
Historical SignificanceBridge is eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000002708

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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