Structure 15430 · Mobile County, AL

US 90/cochrane Br over Mobile River

Carries US 90/cochrane Br over Mobile River, 0.2 Mi E US 43.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
7,291 FT OVERALL1,000 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

7,291 ft end to end, longest span 780 ft: about 20 football fields, or 1.4 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 cable-stayed bridge.

Built199135 years old
Length7291.0 ft2222.3 m
Daily traffic19,190counted 2022
Last inspectedJune 2023every 24 months

Location

StateAlabama
CountyMobile
Location0.2 Mi E US 43
CarriesUS 90/cochrane Br
CrossesMobile River
Coordinates30.73399, -88.04476

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStayed Girder
Total Length7291.0 ft (2222.3 m)
Max Span779.9 ft (237.7 m)
Deck Width91.9 ft (28 m)
Deck Area62224.4 sq m
Main Spans3
Year Built1991

Traffic

Avg Daily Traffic19,190 (2022)
Truck Traffic11%
Lanes On Bridge4
Lanes Under Bridge6

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number015430

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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