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391 Ave over West Firesteel Ck

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

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

391 Ave over West Firesteel Ck in Aurora County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
It was built in 1925 and reconstructed in 1960, making it 100 years old at the 2025 inventory.
It carries about 33 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 7 of the 61 inventoried bridges in Aurora County rated poor (11.5%); 7 (11.5%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 60 ft
Location	5E 6.8N Plankinton
NBI structure number	000000002210082
Condition class	Poor

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