Bridge conditions in Jackson County, South Dakota
89 inventoried bridges · 13 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 7 bridges in Jackson County is rated in poor condition: 13 of 89 on the federal inventory, one of the higher shares in South Dakota.
- 13 of the 89 bridges in Jackson County, South Dakota, are rated in poor condition (14.6%) in the 2025 National Bridge Inventory, as of .
- 26 bridges (29.2%) are rated good and 50 (56.2%) fair.
- The median Jackson County bridge was built in 1968.
- The busiest poor-rated bridge is Irr Bia Rte 2 over Potato Creek (built 1942), carrying about 1,314 vehicles a day.
Good 29.2% · Fair 56.2% · Poor 14.6% of 89 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr Bia Rte 2 over Potato Creek | 1942 | 1,314 | Poor |
| Cottonwood Road over Cottonwood Ck | 1936 | 35 | Poor |
| 242 Street over Outlet For Lake Spillway | 1935 | 35 | Poor |
| 227 Avenue over Franklin Ck | 1940 | 30 | Poor |
| Old NE Road over Big Buffalo Ck | 1940 | 27 | Poor |
| Horseshoe Butte Rd over Black Pipe Ck | 1930 | 27 | Poor |
| 269 Street over Eagle Nest Ck | 1945 | 15 | Poor |
| 254 Street over Cottonwood Ck | 1950 | 15 | Poor |
| 211 Avenue over Whitewater Ck | 1940 | 14 | Poor |
| 237 Street over South Fork Bad River | 1935 | 11 | Poor |
| 206TH Avenue over Cottonwood Ck | 1940 | 10 | Poor |
| 237 Street over Cottonwood Ck | 1935 | 10 | Poor |
| Fairview Road over South Fork Bad Rv | 1940 | 10 | Poor |
Busiest bridges in the county
| 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 |
| I090 E over County Rd | 1968 | 3,552 | Fair |
| I090 W over White Willow Ck | 1967 | 3,552 | Fair |
| I090 E over White Willow Ck | 1967 | 3,552 | Fair |
| I090 W over Big Buffalo Ck | 1967 | 3,525 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of South Dakota: South Dakota bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.