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Old NE Road over Big Buffalo Ck

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

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

Old NE Road over Big Buffalo Ck in Jackson 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 deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1940, making it 85 years old at the 2025 inventory.
It carries about 27 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 13 of the 89 inventoried bridges in Jackson County rated poor (14.6%); 13 (14.6%) 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	Steel stringer or multi-beam girder
Length	about 47 ft
Location	2W & 2.4S Cactus Flat
NBI structure number	000000036100136
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 Br Big Buffalo Ck	1968	6,560	Fair
I090 W over Whitewater Ck	1986	3,956	Fair
I090 E over Whitewater Ck	1973	3,956	Fair
I090 W over SD073 Ck	1967	3,552	Fair
I090 E over SD073 Ck	1967	3,552	Good
I090 W over County Rd	1967	3,552	Fair