US Bridges

I-75 (nbl) over SR 20

Fair

Bartow County, Georgia · 3.3 MI NE of Cartersville · Structure no. 000000001500910

Built
1977
48 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
373 ft
4 main spans
Daily traffic
85,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-75 (nbl) over SR 20 is a steel stringer/multi-beam or girder carrying I-75 (nbl) 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 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 85,000 vehicles a day, roughly 1% of them trucks, projected to reach 116,805 by 2031. The structure is 373 ft (113.7 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesI-75 (nbl)
CrossesSR 20
Location3.3 MI NE of Cartersville
RouteInterstate 75
CountyBartow County
StateGeorgia
Coordinates34.20666, -84.76139
Functional classRural 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.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.9 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length373 ft (113.7 m)
Longest span121 ft (36.9 m)
Deck width62 ft (19 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85,000 (2024)
Projected traffic116,805 by 2031
Trucks1%
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 (nbl) over SR 20 built?

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

What condition is I-75 (nbl) over SR 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 September 2024.

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

About 85,000 vehicles per day (2024 count), of which roughly 1% are trucks.

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

The structure is 373 ft (113.7 m) long with a longest span of 121 ft (36.9 m) and a deck 62 ft wide.

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

It is owned by the State Highway Agency.