US Bridges

I-20 over Snapfinger Creek

Fair

DeKalb County, Georgia · 8.5 MI W of Lithonia · Structure no. 000000008900580

Built
1959
66 years old, rebuilt 1978
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
195 ft
5 main spans
Daily traffic
161,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-20 over Snapfinger Creek is a concrete tee beam carrying I-20 over Snapfinger Creek in DeKalb County, Georgia. It was built in 1959 and reconstructed in 1978, 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 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 161,000 vehicles a day, roughly 1% of them trucks, projected to reach 229,605 by 2031. The structure is 195 ft (59.4 m) long and 119 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesI-20
CrossesSnapfinger Creek
Location8.5 MI W of Lithonia
RouteInterstate 20
StateGeorgia
Coordinates33.70458, -84.19715
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length195 ft (59.4 m)
Longest span39 ft (11.9 m)
Deck width119 ft (36.3 m)
Roadway width113 ft (34.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic161,000 (2024)
Projected traffic229,605 by 2031
Trucks1%
Lanes on structure6
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$2.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-20 over Snapfinger Creek built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1978.

What condition is I-20 over Snapfinger 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 March 2024.

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

About 161,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-20 over Snapfinger Creek?

The structure is 195 ft (59.4 m) long with a longest span of 39 ft (11.9 m) and a deck 119 ft wide.

Who owns I-20 over Snapfinger Creek?

It is owned by the State Highway Agency.