US Bridges

Water ST to I10E/W over Royal ST

Fair

Mobile County, Alabama · West Tunnel Interchange · Structure no. 010667

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
421 ft
7 main spans
Daily traffic
14,238
2022 count
Owner
State
State Highway Agency

About this bridge

Water ST to I10E/W over Royal ST is a prestressed concrete stringer/multi-beam or girder carrying Water ST to I10E/W over Royal ST 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 14,238 vehicles a day, roughly 2% of them trucks, projected to reach 21,357 by 2042. The structure is 421 ft (128.3 m) long and 55 ft wide.

Location

Open in Google Maps
CarriesWater ST to I10E/W
CrossesRoyal ST
LocationWest Tunnel Interchange
RouteInterstate 10
CountyMobile County
StateAlabama
Coordinates30.68645, -88.03988
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.
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 alignment8: Equal to present desirable criteria
Operating rating54.9 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length421 ft (128.3 m)
Longest span86 ft (26.2 m)
Deck width55 ft (16.9 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,238 (2022)
Projected traffic21,357 by 2042
Trucks2%
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$5.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Water ST to I10E/W over Royal ST built?

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

What condition is Water ST to I10E/W over Royal ST 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 Water ST to I10E/W over Royal ST carry?

About 14,238 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Water ST to I10E/W over Royal ST?

The structure is 421 ft (128.3 m) long with a longest span of 86 ft (26.2 m) and a deck 55 ft wide.

Who owns Water ST to I10E/W over Royal ST?

It is owned by the State Highway Agency.