US Bridges

I-75 (sbl) over SR 20

Good

Bartow County, Georgia · 3.3 MI NE of Cartersville · Structure no. 000000001500920

Built
1977
48 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
376 ft
4 main spans
Daily traffic
50,400
2024 count
Owner
State
State Highway Agency

About this bridge

I-75 (sbl) over SR 20 is a steel stringer/multi-beam or girder carrying I-75 (sbl) over SR 20 in Bartow County, Georgia. It was built in 1977, so it is 48 years old, older than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50,400 vehicles a day, roughly 26% of them trucks, projected to reach 98,565 by 2031. The structure is 376 ft (114.6 m) long and 62 ft wide.

Location

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CarriesI-75 (sbl)
CrossesSR 20
Location3.3 MI NE of Cartersville
RouteInterstate 75
CountyBartow County
StateGeorgia
Coordinates34.20639, -84.76172
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating25.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length376 ft (114.6 m)
Longest span110 ft (33.5 m)
Deck width62 ft (19 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,400 (2024)
Projected traffic98,565 by 2031
Trucks26%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$2.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 (sbl) over SR 20 built?

It was built in 1977, making it 48 years old in 2025.

What condition is I-75 (sbl) over SR 20 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does I-75 (sbl) over SR 20 carry?

About 50,400 vehicles per day (2024 count), of which roughly 26% are trucks.

How long is I-75 (sbl) over SR 20?

The structure is 376 ft (114.6 m) long with a longest span of 110 ft (33.5 m) and a deck 62 ft wide.

Who owns I-75 (sbl) over SR 20?

It is owned by the State Highway Agency.