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Ky-390 over Salt River

Mercer County, Kentucky · rated Fair in the 2025 National Bridge Inventory

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

Ky-390 over Salt River in Mercer County, Kentucky, 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 1990, making it 35 years old at the 2025 inventory.
It carries about 1,380 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 45 of the 76 inventoried bridges in Mercer County rated fair (59.2%); 6 (7.9%) 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	Prestressed concrete multiple box beam
Length	about 99 ft
Location	4.2 Mi W. Jct US 127
NBI structure number	084B00038N
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Danville Road over Dry Creek	1952	10,414	Fair
Harrodsburg Bypass over Pioneer Creek	1996	9,565	Fair
Martha Layne Colli over Salt River	1965	7,450	Fair
Bg-9002 over Salt River	1965	7,450	Fair
127 Bypass South R over Southern RR	1996	4,783	Good
Harrodsburg Bypass over Southern Railroad	1996	4,783	Good