US Bridges

SR 20 Westbound over Chattahoochee River

Good

Gwinnett County, Georgia · At Forsyth County Line · Structure no. 000000013552550

Built
2015
10 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
465 ft
4 main spans
Daily traffic
18,700
2024 count
Owner
State
State Highway Agency

About this bridge

SR 20 Westbound over Chattahoochee River is a concrete stringer/multi-beam or girder carrying SR 20 Westbound over Chattahoochee River in Gwinnett County, Georgia. It was built in 2015, so it is 10 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 18,700 vehicles a day, roughly 7% of them trucks, projected to reach 43,260 by 2032. The structure is 465 ft (141.7 m) long and 45 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSR 20 Westbound
CrossesChattahoochee River
LocationAt Forsyth County Line
RouteState Highway 20
CountyGwinnett County
StateGeorgia
Coordinates34.12622, -84.09335
Functional classUrban Other Principal Arterial

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 protection9 ExcellentNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating36.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length465 ft (141.7 m)
Longest span140 ft (42.7 m)
Deck width45 ft (13.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,700 (2024)
Projected traffic43,260 by 2032
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$61.9 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 Westbound over Chattahoochee River built?

It was built in 2015, making it 10 years old in 2025.

What condition is SR 20 Westbound over Chattahoochee River 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 December 2023.

How much traffic does SR 20 Westbound over Chattahoochee River carry?

About 18,700 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SR 20 Westbound over Chattahoochee River?

The structure is 465 ft (141.7 m) long with a longest span of 140 ft (42.7 m) and a deck 45 ft wide.

Who owns SR 20 Westbound over Chattahoochee River?

It is owned by the State Highway Agency.