US Bridges

SR 181 NB over I-10 EB * WB

Fair

Baldwin County, Alabama · JCT I-10 * SR 181 · Structure no. 010418

Built
1970
55 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
299 ft
4 main spans
Daily traffic
18,964
2022 count
Owner
State
State Highway Agency

About this bridge

SR 181 NB over I-10 EB * WB is a concrete continuous tee beam carrying SR 181 NB over I-10 EB * WB in Baldwin County, Alabama. It was built in 1970, so it is 55 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 6 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 18,964 vehicles a day, roughly 4% of them trucks, projected to reach 28,446 by 2042. The structure is 299 ft (91.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 181 NB
CrossesI-10 EB * WB
LocationJCT I-10 * SR 181
RouteState Highway 181
StateAlabama
Coordinates30.66279, -87.85223
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.5 US tons
Inventory rating26.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length299 ft (91.1 m)
Longest span82 ft (25 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,964 (2022)
Projected traffic28,446 by 2042
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$3.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 181 NB over I-10 EB * WB built?

It was built in 1970, making it 55 years old in 2025.

What condition is SR 181 NB over I-10 EB * WB 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 SR 181 NB over I-10 EB * WB carry?

About 18,964 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is SR 181 NB over I-10 EB * WB?

The structure is 299 ft (91.1 m) long with a longest span of 82 ft (25 m) and a deck 43 ft wide.

Who owns SR 181 NB over I-10 EB * WB?

It is owned by the State Highway Agency.