US Bridges

SR 20 over SR 400 (us 19)

Good

Forsyth County, Georgia · 1.5 MI SE of Cumming · Structure no. 000000011700080

Built
1974
51 years old, rebuilt 2005
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
326 ft
2 main spans
Daily traffic
33,400
2024 count
Owner
State
State Highway Agency

About this bridge

SR 20 over SR 400 (us 19) is a steel continuous stringer/multi-beam or girder carrying SR 20 over SR 400 (us 19) in Forsyth County, Georgia. It was built in 1974 and reconstructed in 2005, so it is 51 years old, older 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 33,400 vehicles a day, roughly 1% of them trucks, projected to reach 54,990 by 2032. The structure is 326 ft (99.4 m) long and 138 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 20
CrossesSR 400 (us 19)
Location1.5 MI SE of Cumming
RouteState Highway 20
StateGeorgia
Coordinates34.18383, -84.13864
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length326 ft (99.4 m)
Longest span163 ft (49.7 m)
Deck width138 ft (42.1 m)
Roadway width124 ft (37.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,400 (2024)
Projected traffic54,990 by 2032
Trucks1%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost$4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 20 over SR 400 (us 19) built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2005.

What condition is SR 20 over SR 400 (us 19) 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 May 2023.

How much traffic does SR 20 over SR 400 (us 19) carry?

About 33,400 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 20 over SR 400 (us 19)?

The structure is 326 ft (99.4 m) long with a longest span of 163 ft (49.7 m) and a deck 138 ft wide.

Who owns SR 20 over SR 400 (us 19)?

It is owned by the State Highway Agency.