US Bridges

I-75 Managed Lanes over Rottenwood Creek

Good

Cobb County, Georgia · In East Marietta · Structure no. 000000006753390

Built
2017
8 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,278 ft
9 main spans
Daily traffic
6,650
2024 count
Owner
State
State Highway Agency

About this bridge

I-75 Managed Lanes over Rottenwood Creek is a prestressed concrete stringer/multi-beam or girder carrying I-75 Managed Lanes over Rottenwood Creek in Cobb County, Georgia. It was built in 2017, so it is 8 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 6,650 vehicles a day, projected to reach 18,520 by 2035. The structure is 1,278 ft (389.5 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesI-75 Managed Lanes
CrossesRottenwood Creek
LocationIn East Marietta
RouteInterstate 75
StateGeorgia
Coordinates33.92862, -84.48915
Functional classUrban 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.9 US tons
Inventory rating40.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length1,278 ft (389.5 m)
Longest span142 ft (43.3 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,650 (2024)
Projected traffic18,520 by 2035
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a toll 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$170.2 million (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 Managed Lanes over Rottenwood Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is I-75 Managed Lanes over Rottenwood Creek 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 February 2024.

How much traffic does I-75 Managed Lanes over Rottenwood Creek carry?

About 6,650 vehicles per day (2024 count).

How long is I-75 Managed Lanes over Rottenwood Creek?

The structure is 1,278 ft (389.5 m) long with a longest span of 142 ft (43.3 m) and a deck 39 ft wide.

Who owns I-75 Managed Lanes over Rottenwood Creek?

It is owned by the State Highway Agency.