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380 Ave (fas 6119) over I090

Aurora County, South Dakota · rated Good in the 2025 National Bridge Inventory

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

380 Ave (fas 6119) over I090 in Aurora County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1965, making it 60 years old at the 2025 inventory.
It carries about 48 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 25 of the 61 inventoried bridges in Aurora County rated good (41.0%); 7 (11.5%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete stringer or multi-beam girder
Length	about 253 ft
Location	6.0 E White Lake Interch
NBI structure number	000000002100155
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I090 over Ck	1965	9,890	Fair
I090 W over Platte Ck	1964	4,425	Fair
I090 E over Platte Ck	1964	4,425	Fair
US281 over I090	1965	1,694	Fair
US281 over Ck	2007	1,434	Good
US281 over West Br Firesteel Ck	1959	1,284	Fair