US Bridges

River Run Drive over Cahaba River

Fair

Jefferson County, Alabama · River Run @ Overton · Structure no. 010907

Built
1973
52 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
4 main spans
Daily traffic
2,805
2021 count
Owner
County
County Highway Agency

About this bridge

River Run Drive over Cahaba River is a prestressed concrete stringer/multi-beam or girder carrying River Run Drive over Cahaba River in Jefferson County, Alabama. It was built in 1973, so it is 52 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 2,805 vehicles a day, roughly 2% of them trucks, projected to reach 3,900 by 2041. The structure is 252 ft (76.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRiver Run Drive
CrossesCahaba River
LocationRiver Run @ Overton
RouteCounty Highway 0
CountyJefferson County
StateAlabama
Coordinates33.4817, -86.71298
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length252 ft (76.7 m)
Longest span62 ft (18.9 m)
Deck width40 ft (12.3 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,805 (2021)
Projected traffic3,900 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$2.6 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was River Run Drive over Cahaba River built?

It was built in 1973, making it 52 years old in 2025.

What condition is River Run Drive 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 July 2023.

How much traffic does River Run Drive over Cahaba River carry?

About 2,805 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is River Run Drive over Cahaba River?

The structure is 252 ft (76.7 m) long with a longest span of 62 ft (18.9 m) and a deck 40 ft wide.

Who owns River Run Drive over Cahaba River?

It is owned by the County Highway Agency.