Structure 10665 · Mobile County, AL

I-10WB To Water ST over I10-eb/wb/ramp To WB I10

Carries I-10WB To Water ST over I10-eb/wb/ramp To WB I10, West Tunnel Interchange.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,179 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

1,179 ft end to end, longest span 80 ft: about 3.3 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 multi-beam bridge.

Built197254 years old
Length1179.1 ft359.4 m
Daily traffic4,065counted 2022
Last inspectedApril 2024every 24 months

Location

StateAlabama
CountyMobile
LocationWest Tunnel Interchange
CarriesI-10WB To Water ST
CrossesI10-eb/wb/ramp To WB I10
Coordinates30.68559, -88.04046

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1179.1 ft (359.4 m)
Max Span80.1 ft (24.4 m)
Deck Width28.5 ft (8.7 m)
Deck Area3126.8 sq m
Main Spans21
Year Built1972

Traffic

Avg Daily Traffic4,065 (2022)
Truck Traffic13%
Lanes On Bridge1
Lanes Under Bridge6

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number010665

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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