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39510 284 St over Choteau Ck

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

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

39510 284 St over Choteau Ck in Douglas 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 deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1925, making it 100 years old at the 2025 inventory.
It carries about 320 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 18 of the 44 inventoried bridges in Douglas County rated fair (40.9%); 7 (15.9%) 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	Steel stringer or multi-beam girder
Length	about 120 ft
Location	5.9 W. Delmont
NBI structure number	000000022211160
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
SD044 over Choteau Ck	1961	1,785	Fair
SD044 over Br Choteau Ck	1960	1,785	Good
SD044 over Andes Ck	1957	1,516	Fair
US281 over Ck	1998	1,232	Good
Irr US018 over Creek	1961	556	Poor
Irr US018 over Branch of Choteau Ck	1961	556	Fair