US Bridges

I-10 WB over Styx River

Fair

Baldwin County, Alabama · 3.3 MI E CO RD 87 · Structure no. 008530

Built
1965
60 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
847 ft
3 main spans
Daily traffic
18,681
2023 count
Owner
State
State Highway Agency

About this bridge

I-10 WB over Styx River is a steel stringer/multi-beam or girder carrying I-10 WB over Styx River in Baldwin County, Alabama. It was built in 1965, so it is 60 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 18,681 vehicles a day, roughly 24% of them trucks, projected to reach 28,022 by 2043. The structure is 847 ft (258.2 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-10 WB
CrossesStyx River
Location3.3 MI E CO RD 87
RouteInterstate 10
CountyBaldwin County
StateAlabama
Coordinates30.58127, -87.50636
Functional classRural 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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating31.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+19 approach)
Design loadHS 20
Structure length847 ft (258.2 m)
Longest span80 ft (24.4 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,681 (2023)
Projected traffic28,022 by 2043
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$6.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-10 WB over Styx River built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-10 WB over Styx River 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 July 2024.

How much traffic does I-10 WB over Styx River carry?

About 18,681 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I-10 WB over Styx River?

The structure is 847 ft (258.2 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.

Who owns I-10 WB over Styx River?

It is owned by the State Highway Agency.