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Sc 170 over Little Back River

Chattahoochee County, Georgia · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Sc 170 over Little Back River in Chattahoochee County, Georgia, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1925 and reconstructed in 1953, making it 100 years old at the 2025 inventory.
It carries about 3,800 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 16 of the 60 inventoried bridges in Chattahoochee County rated fair (26.7%); 1 (1.7%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 1,986 ft
Location	Ga/sc Ln
NBI structure number	000000005190010
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Georgia department of transportation.

Bridge	Built	Vehicles/day	Condition
SR 520 - US 27 (EB over Upatoi Creek	1943	18,800	Good
SR 520 (US 27) over Cs 33156 Victory Pond Rd	1943	14,600	Fair
Hour Glass Road over SR 520 (US 27) 5.08 East	1943	14,600	Good
SR 520 (US 27) over Cs 24874 Marne Road	1943	10,900	Good
First Division Rd. over SR 520 (US 27) 1.97 East	1943	10,900	Fair
SR 520 - US 27 (WB over Upatoi Creek	1943	10,500	Good