US Bridges

I-20 over Shoal Creek

Fair

DeKalb County, Georgia · 7 MI SE of Decatur · Structure no. 000000008900560

Built
1959
66 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
49 ft
4 main spans
Daily traffic
150,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-20 over Shoal Creek is a concrete culvert carrying I-20 over Shoal Creek in DeKalb County, Georgia. It was built in 1959, so it is 66 years old, older than the Georgia average of 47.5 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 150,000 vehicles a day, roughly 1% of them trucks, projected to reach 198,135 by 2031. The structure is 49 ft (14.9 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesI-20
CrossesShoal Creek
Location7 MI SE of Decatur
RouteInterstate 20
StateGeorgia
Coordinates33.71504, -84.26432
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length49 ft (14.9 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150,000 (2024)
Projected traffic198,135 by 2031
Trucks1%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$914,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I-20 over Shoal Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is I-20 over Shoal Creek 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 May 2024.

How much traffic does I-20 over Shoal Creek carry?

About 150,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-20 over Shoal Creek?

The structure is 49 ft (14.9 m) long with a longest span of 11 ft (3.4 m).

Who owns I-20 over Shoal Creek?

It is owned by the State Highway Agency.