US Bridges

I-75/I-285/RAMP-B over Rottenwood Cr/Cumb Pky

Good

Cobb County, Georgia · 6.7 Miles South East of M · Structure no. 000000006753320

Built
2017
8 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,021 ft
8 main spans
Daily traffic
6,805
2024 count
Owner
State
State Highway Agency

About this bridge

I-75/I-285/RAMP-B over Rottenwood Cr/Cumb Pky is a prestressed concrete stringer/multi-beam or girder carrying I-75/I-285/RAMP-B over Rottenwood Cr/Cumb Pky 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 6,805 vehicles a day, projected to reach 860 by 2035. The structure is 1,021 ft (311.2 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-75/I-285/RAMP-B
CrossesRottenwood Cr/Cumb Pky
Location6.7 Miles South East of M
RouteInterstate 285
CountyCobb County
StateGeorgia
Coordinates33.89123, -84.45785
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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating35.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length1,021 ft (311.2 m)
Longest span137 ft (41.8 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,805 (2024)
Projected traffic860 by 2035
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.9 mi (3 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$136 million (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75/I-285/RAMP-B over Rottenwood Cr/Cumb Pky built?

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

What condition is I-75/I-285/RAMP-B over Rottenwood Cr/Cumb Pky 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/I-285/RAMP-B over Rottenwood Cr/Cumb Pky carry?

About 6,805 vehicles per day (2024 count).

How long is I-75/I-285/RAMP-B over Rottenwood Cr/Cumb Pky?

The structure is 1,021 ft (311.2 m) long with a longest span of 137 ft (41.8 m) and a deck 29 ft wide.

Who owns I-75/I-285/RAMP-B over Rottenwood Cr/Cumb Pky?

It is owned by the State Highway Agency.