US Bridges

SR 120 Loop (cbl) over SR 120

Good

Cobb County, Georgia · In East Marietta · Structure no. 000000006700450

Built
1969
56 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
189 ft
4 main spans
Daily traffic
23,710
2024 count
Owner
State
State Highway Agency

About this bridge

SR 120 Loop (cbl) over SR 120 is a steel stringer/multi-beam or girder carrying SR 120 Loop (cbl) over SR 120 in Cobb County, Georgia. It was built in 1969, so it is 56 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 23,710 vehicles a day, roughly 1% of them trucks, projected to reach 35,565 by 2032. The structure is 189 ft (57.6 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 120 Loop (cbl)
CrossesSR 120
LocationIn East Marietta
RouteState Highway 120
StateGeorgia
Coordinates33.96049, -84.49712
Functional classUrban Other Principal 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating26.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length189 ft (57.6 m)
Longest span56 ft (17.1 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,710 (2024)
Projected traffic35,565 by 2032
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 120 Loop (cbl) over SR 120 built?

It was built in 1969, making it 56 years old in 2025.

What condition is SR 120 Loop (cbl) over SR 120 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 March 2023.

How much traffic does SR 120 Loop (cbl) over SR 120 carry?

About 23,710 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 120 Loop (cbl) over SR 120?

The structure is 189 ft (57.6 m) long with a longest span of 56 ft (17.1 m) and a deck 34 ft wide.

Who owns SR 120 Loop (cbl) over SR 120?

It is owned by the State Highway Agency.