US Bridges

I-10 WB to US 90 over US 90

Fair

Mobile County, Alabama · East Tunnel Interchange · Structure no. 010855

Built
1973
52 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,260 ft
17 main spans
Daily traffic
7,488
2023 count
Owner
State
State Highway Agency

About this bridge

I-10 WB to US 90 over US 90 is a prestressed concrete stringer/multi-beam or girder carrying I-10 WB to US 90 over US 90 in Mobile County, Alabama. It was built in 1973, so it is 52 years old, older than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,488 vehicles a day, roughly 16% of them trucks, projected to reach 11,232 by 2043. The structure is 1,260 ft (384 m) long and 29 ft wide.

Location

Open in Google Maps
CarriesI-10 WB to US 90
CrossesUS 90
LocationEast Tunnel Interchange
RouteInterstate 10
CountyMobile County
StateAlabama
Coordinates30.69318, -88.02732
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.8 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans17 (+12 approach)
Design loadHS 20
Structure length1,260 ft (384 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.8 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,488 (2023)
Projected traffic11,232 by 2043
Trucks16%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$8.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-10 WB to US 90 over US 90 built?

It was built in 1973, making it 52 years old in 2025.

What condition is I-10 WB to US 90 over US 90 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does I-10 WB to US 90 over US 90 carry?

About 7,488 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-10 WB to US 90 over US 90?

The structure is 1,260 ft (384 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns I-10 WB to US 90 over US 90?

It is owned by the State Highway Agency.