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SR 315 over I-185 @18.83N (exit 19)

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

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

SR 315 over I-185 @18.83N (exit 19) in Harris County, Georgia, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 8,610 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 24 of the 99 inventoried bridges in Harris County rated fair (24.2%); 1 (1.0%) 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	Continuous steel stringer or multi-beam girder
Length	about 310 ft
Location	9 Mi SW of Hamilton
NBI structure number	000000014500310
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-85 (sbl) over Chattahoochee River	1961	44,900	Fair
I-85 (nbl) over Chattahoochee River	1961	41,500	Fair
I-185 (nbl) over Standing Boy Creek	1978	39,000	Good
I-185 over Mulberry Creek O/f	1978	33,700	Good
I-185 (nbl) over Mulberry Creek	1978	33,700	Good
I-185 (nbl) over S-2651 L. Blue Springs R	1978	33,700	Fair