US Bridges

163 SB to I-10 EB over I-10 * SR 163

Fair

Mobile County, Alabama · I-10 @ SR 163 Interchange · Structure no. 008959

Built
1966
59 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
486 ft
5 main spans
Daily traffic
2,574
2022 count
Owner
State
State Highway Agency

About this bridge

163 SB to I-10 EB over I-10 * SR 163 is a prestressed concrete continuous box beam or girders - single or spread carrying 163 SB to I-10 EB over I-10 * SR 163 in Mobile County, Alabama. It was built in 1966, so it is 59 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 2,574 vehicles a day, roughly 6% of them trucks, projected to reach 3,861 by 2042. The structure is 486 ft (148.1 m) long and 27 ft wide.

Location

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Carries163 SB to I-10 EB
CrossesI-10 * SR 163
LocationI-10 @ SR 163 Interchange
RouteInterstate 10
CountyMobile County
StateAlabama
Coordinates30.64077, -88.08937
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.3 US tons
Inventory rating24.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5 (+2 approach)
Design loadHS 20
Structure length486 ft (148.1 m)
Longest span100 ft (30.5 m)
Deck width27 ft (8.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic2,574 (2022)
Projected traffic3,861 by 2042
Trucks6%
Lanes on structure1
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 163 SB to I-10 EB over I-10 * SR 163 built?

It was built in 1966, making it 59 years old in 2025.

What condition is 163 SB to I-10 EB over I-10 * SR 163 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 June 2024.

How much traffic does 163 SB to I-10 EB over I-10 * SR 163 carry?

About 2,574 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is 163 SB to I-10 EB over I-10 * SR 163?

The structure is 486 ft (148.1 m) long with a longest span of 100 ft (30.5 m) and a deck 27 ft wide.

Who owns 163 SB to I-10 EB over I-10 * SR 163?

It is owned by the State Highway Agency.