US Bridges

CO 129-MAHAFFEY RD over I-20

Fair

Talladega County, Alabama · 4.5 MI E Ext 173 · Structure no. 008547

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
247 ft
4 main spans
Daily traffic
364
2022 count
Owner
State
State Highway Agency

About this bridge

CO 129-MAHAFFEY RD over I-20 is a concrete continuous tee beam carrying CO 129-MAHAFFEY RD over I-20 in Talladega 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 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 364 vehicles a day, roughly 4% of them trucks, projected to reach 509 by 2042. The structure is 247 ft (75.3 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCO 129-MAHAFFEY RD
CrossesI-20
Location4.5 MI E Ext 173
RouteCounty Highway 129
CountyTalladega County
StateAlabama
Coordinates33.58016, -85.94803
Functional classRural Local

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating27.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length247 ft (75.3 m)
Longest span68 ft (20.7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic364 (2022)
Projected traffic509 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was CO 129-MAHAFFEY RD over I-20 built?

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

What condition is CO 129-MAHAFFEY RD over I-20 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 CO 129-MAHAFFEY RD over I-20 carry?

About 364 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is CO 129-MAHAFFEY RD over I-20?

The structure is 247 ft (75.3 m) long with a longest span of 68 ft (20.7 m) and a deck 27 ft wide.

Who owns CO 129-MAHAFFEY RD over I-20?

It is owned by the State Highway Agency.