US Bridges

I-75/I-285/RAMP-C over R-Wood CR/75/285/CUMB

Good

Cobb County, Georgia · 6.8 Miles South East of M · Structure no. 000000006753330

Built
2017
8 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
2,827 ft
18 main spans
Daily traffic
6,420
2024 count
Owner
State
State Highway Agency

About this bridge

I-75/I-285/RAMP-C over R-Wood CR/75/285/CUMB is a prestressed concrete stringer/multi-beam or girder carrying I-75/I-285/RAMP-C over R-Wood CR/75/285/CUMB 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 6,420 vehicles a day, projected to reach 4,940 by 2035. The structure is 2,827 ft (861.7 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-75/I-285/RAMP-C
CrossesR-Wood CR/75/285/CUMB
Location6.8 Miles South East of M
RouteInterstate 285
CountyCobb County
StateGeorgia
Coordinates33.88972, -84.45977
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 rating60 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20 + Mod
Structure length2,827 ft (861.7 m)
Longest span235 ft (71.6 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,420 (2024)
Projected traffic4,940 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$376.6 million (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75/I-285/RAMP-C over R-Wood CR/75/285/CUMB built?

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

What condition is I-75/I-285/RAMP-C over R-Wood CR/75/285/CUMB 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-C over R-Wood CR/75/285/CUMB carry?

About 6,420 vehicles per day (2024 count).

How long is I-75/I-285/RAMP-C over R-Wood CR/75/285/CUMB?

The structure is 2,827 ft (861.7 m) long with a longest span of 235 ft (71.6 m) and a deck 29 ft wide.

Who owns I-75/I-285/RAMP-C over R-Wood CR/75/285/CUMB?

It is owned by the State Highway Agency.