US Bridges

Marietta Street over SR 20

Good

Cherokee County, Georgia · In South Canton · Structure no. 000000005700710

Built
1978
47 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
382 ft
4 main spans
Daily traffic
7,180
2024 count
Owner
State
State Highway Agency

About this bridge

Marietta Street over SR 20 is a steel continuous stringer/multi-beam or girder carrying Marietta Street over SR 20 in Cherokee County, Georgia. It was built in 1978, so it is 47 years old, younger 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 7,180 vehicles a day, roughly 1% of them trucks, projected to reach 7,545 by 2032. The structure is 382 ft (116.4 m) long and 51 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMarietta Street
CrossesSR 20
LocationIn South Canton
RouteCounty Highway 1375
StateGeorgia
Coordinates34.22089, -84.49631
Functional classUrban Minor Arterial

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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating67.9 US tons
Inventory rating40.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length382 ft (116.4 m)
Longest span124 ft (37.8 m)
Deck width51 ft (15.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,180 (2024)
Projected traffic7,545 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost$2.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Marietta Street over SR 20 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Marietta Street 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 April 2024.

How much traffic does Marietta Street over SR 20 carry?

About 7,180 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Marietta Street over SR 20?

The structure is 382 ft (116.4 m) long with a longest span of 124 ft (37.8 m) and a deck 51 ft wide.

Who owns Marietta Street over SR 20?

It is owned by the State Highway Agency.