Structure 2666 · Allegheny County, PA

Rankin Br over Sr837ex 3 Rrs Kenmarave

Carries Rankin Br over Sr837ex 3 Rrs Kenmarave, Ma0735 Rankin Br-main Str.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,426 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 6/9

2,426 ft end to end, longest span 525 ft: about 6.7 football fields. 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 deck truss.

Built1951rebuilt 2011
Length2425.9 ft739.4 m
Daily traffic25,860counted 2011
Last inspectedJuly 2023every 24 months

Location

StatePennsylvania
CountyAllegheny
LocationMa0735 Rankin Br-main Str
CarriesRankin Br
CrossesSr837ex 3 Rrs Kenmarave
Coordinates40.40567, -79.88099

Physical Characteristics

MaterialSteel Continuous
DesignTruss - Deck
Total Length2425.9 ft (739.4 m)
Max Span524.9 ft (160 m)
Deck Width67.3 ft (20.5 m)
Deck Area15157.7 sq m
Main Spans9
Year Built1951 (reconstructed 2011)

Traffic

Avg Daily Traffic25,860 (2011)
Truck Traffic10%
Lanes On Bridge4
Lanes Under Bridge10

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000002666

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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