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486 Avenue over Ck

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

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

486 Avenue over Ck in Grant County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1973, making it 52 years old at the 2025 inventory.
It carries about 55 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 67 of the 205 inventoried bridges in Grant County rated fair (32.7%); 38 (18.5%) 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 tee beam
Length	about 40 ft
Location	4.5E & 1.8S Revillo
NBI structure number	000000026370233
Condition class	Fair

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