US Bridges

Marne Road over I-185

Fair

Chattahoochee County, Georgia · .1 KM E/O Santa Fe RD · Structure no. 0000000000M9368

Built
1978
47 years old, rebuilt 2011
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
301 ft
4 main spans
Daily traffic
900
2023 count
Owner
Federal
Army

About this bridge

Marne Road over I-185 is a prestressed concrete stringer/multi-beam or girder carrying Marne Road over I-185 in Chattahoochee County, Georgia. It was built in 1978 and reconstructed in 2011, so it is 47 years old, younger 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 5 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 900 vehicles a day, roughly 10% of them trucks, projected to reach 900 by 2045. The structure is 301 ft (91.6 m) long and 76 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMarne Road
CrossesI-185
Location.1 KM E/O Santa Fe RD
CountyChattahoochee County
StateGeorgia
Coordinates32.37143, -84.92468
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length301 ft (91.6 m)
Longest span75 ft (22.9 m)
Deck width76 ft (23.3 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2023)
Projected traffic900 by 2045
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerArmy
Maintained byArmy
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Marne Road over I-185 built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2011.

What condition is Marne Road over I-185 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 August 2023.

How much traffic does Marne Road over I-185 carry?

About 900 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Marne Road over I-185?

The structure is 301 ft (91.6 m) long with a longest span of 75 ft (22.9 m) and a deck 76 ft wide.

Who owns Marne Road over I-185?

It is owned by the Army.