US Bridges

I - 65 South over Cahaba River

Fair

Shelby County, Alabama · I 65 * Cahaba River · Structure no. 011933

Built
1978
47 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
703 ft
7 main spans
Daily traffic
56,815
2024 count
Owner
State
State Highway Agency

About this bridge

I - 65 South over Cahaba River is a steel continuous stringer/multi-beam or girder carrying I - 65 South over Cahaba River in Shelby County, Alabama. It was built in 1978, so it is 47 years old, younger 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 56,815 vehicles a day, roughly 13% of them trucks, projected to reach 71,980 by 2044. The structure is 703 ft (214.2 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI - 65 South
CrossesCahaba River
LocationI 65 * Cahaba River
RouteInterstate 65
StateAlabama
Coordinates33.36966, -86.77771
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length703 ft (214.2 m)
Longest span102 ft (31 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,815 (2024)
Projected traffic71,980 by 2044
Trucks13%
Lanes on structure3
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 proposedNone recorded
Estimated improvement cost$9.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I - 65 South over Cahaba River built?

It was built in 1978, making it 47 years old in 2025.

What condition is I - 65 South over Cahaba 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 September 2024.

How much traffic does I - 65 South over Cahaba River carry?

About 56,815 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is I - 65 South over Cahaba River?

The structure is 703 ft (214.2 m) long with a longest span of 102 ft (31 m) and a deck 59 ft wide.

Who owns I - 65 South over Cahaba River?

It is owned by the State Highway Agency.