Structure 2427 · Allegheny County, PA

Mission ST over Gomer And Greely Streets

Carries Mission ST over Gomer And Greely Streets, 060 Mission ST East.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT225 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

225 ft end to end, longest span 93 ft: about 3 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.

Built1939rebuilt 1982
Length225.1 ft68.6 m
Daily traffic650counted 2020
Last inspectedSeptember 2024every 24 months

Location

StatePennsylvania
CountyAllegheny
Location060 Mission ST East
CarriesMission ST
CrossesGomer And Greely Streets
Coordinates40.42326, -79.97432

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length225.1 ft (68.6 m)
Max Span92.8 ft (28.3 m)
Deck Width36.1 ft (11 m)
Deck Area754.6 sq m
Main Spans3
Year Built1939 (reconstructed 1982)

Traffic

Avg Daily Traffic650 (2020)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000002427

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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