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161 Street over S Fork Yellow Bank River

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

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

161 Street over S Fork Yellow Bank River in Grant 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 superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1940 and reconstructed in 1965, making it 85 years old at the 2025 inventory.
It carries about 52 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 38 of the 205 inventoried bridges in Grant County rated poor (18.5%); 38 (18.5%) 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	Timber stringer or multi-beam girder
Length	about 68 ft
Location	4.4E Albee
NBI structure number	000000026374190
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Irr I029 over Indian Rv	1976	6,600	Fair
US012 over Whetstone Rv Div Channel	1955	3,765	Fair
Irr I029 S over 146 St	1977	3,650	Fair
Irr I029 N over 146 St	1977	3,650	Good
Irr I029 S over 149 St (fas 6266)	1976	3,650	Fair
Irr I029 N over 149 St (fas 6266)	1976	3,650	Fair