US Bridges

SR 5 (nbl) over I-75 + (1) I-75 Ramp

Fair

Cobb County, Georgia · 2.3 MI N of Marietta · Structure no. 000000006700220

Built
1974
51 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
407 ft
5 main spans
Daily traffic
17,400
2024 count
Owner
State
State Highway Agency

About this bridge

SR 5 (nbl) over I-75 + (1) I-75 Ramp is a steel stringer/multi-beam or girder carrying SR 5 (nbl) over I-75 + (1) I-75 Ramp in Cobb County, Georgia. It was built in 1974, so it is 51 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 17,400 vehicles a day, roughly 3% of them trucks, projected to reach 23,340 by 2032. The structure is 407 ft (124.1 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 5 (nbl)
CrossesI-75 + (1) I-75 Ramp
Location2.3 MI N of Marietta
RouteState Highway 5
CountyCobb County
StateGeorgia
Coordinates33.98425, -84.5421
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length407 ft (124.1 m)
Longest span117 ft (35.7 m)
Deck width52 ft (16 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,400 (2024)
Projected traffic23,340 by 2032
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 5 (nbl) over I-75 + (1) I-75 Ramp built?

It was built in 1974, making it 51 years old in 2025.

What condition is SR 5 (nbl) over I-75 + (1) I-75 Ramp 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 2023.

How much traffic does SR 5 (nbl) over I-75 + (1) I-75 Ramp carry?

About 17,400 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is SR 5 (nbl) over I-75 + (1) I-75 Ramp?

The structure is 407 ft (124.1 m) long with a longest span of 117 ft (35.7 m) and a deck 52 ft wide.

Who owns SR 5 (nbl) over I-75 + (1) I-75 Ramp?

It is owned by the State Highway Agency.