US Bridges

I-10EB to Water ST over Royal/Monroe Sts

Fair

Mobile County, Alabama · West Tunnel Interchange · Structure no. 010666

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
2,121 ft
34 main spans
Daily traffic
14,782
2022 count
Owner
State
State Highway Agency

About this bridge

I-10EB to Water ST over Royal/Monroe Sts is a prestressed concrete stringer/multi-beam or girder carrying I-10EB to Water ST over Royal/Monroe Sts in Mobile County, Alabama. It was built in 1972, so it is 53 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 14,782 vehicles a day, roughly 4% of them trucks, projected to reach 22,173 by 2042. The structure is 2,121 ft (646.5 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesI-10EB to Water ST
CrossesRoyal/Monroe Sts
LocationWest Tunnel Interchange
RouteInterstate 10
CountyMobile County
StateAlabama
Coordinates30.6839, -88.04189
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating84.5 US tons
Inventory rating50.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans34
Design loadHS 20
Structure length2,121 ft (646.5 m)
Longest span88 ft (26.8 m)
Deck width43 ft (13.2 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,782 (2022)
Projected traffic22,173 by 2042
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$21 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-10EB to Water ST over Royal/Monroe Sts built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-10EB to Water ST over Royal/Monroe Sts 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 April 2024.

How much traffic does I-10EB to Water ST over Royal/Monroe Sts carry?

About 14,782 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is I-10EB to Water ST over Royal/Monroe Sts?

The structure is 2,121 ft (646.5 m) long with a longest span of 88 ft (26.8 m) and a deck 43 ft wide.

Who owns I-10EB to Water ST over Royal/Monroe Sts?

It is owned by the State Highway Agency.