Bridge conditions in Stanley County, South Dakota
37 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 6 bridges in Stanley County is rated in poor condition: 6 of 37 on the federal inventory, one of the higher shares in South Dakota.
- 6 of the 37 bridges in Stanley County, South Dakota, are rated in poor condition (16.2%) in the 2025 National Bridge Inventory, as of .
- 13 bridges (35.1%) are rated good and 18 (48.6%) fair.
- The median Stanley County bridge was built in 1967.
- The busiest poor-rated bridge is Fas 3214 over Dan Powell Ck (built 1936), carrying about 210 vehicles a day.
Good 35.1% · Fair 48.6% · Poor 16.2% of 37 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 |
|---|---|---|---|
| Fas 3214 over Dan Powell Ck | 1936 | 210 | Poor |
| 291ST Ave over Antelope Ck | 1935 | 130 | Poor |
| Stae Highway 1806 over Oahe Dam Spillway | 1963 | 123 | Poor |
| US014 Ef over Prairie Dog Ck | 1920 | 50 | Poor |
| US014 Ef over Little Prairie Dog Ck | 1920 | 50 | Poor |
| Pleasant Valley Rd over Lance Ck | 1930 | 17 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US083 over Bad Rv | 1956 | 6,040 | Fair |
| SD1806 over Ck | 1963 | 1,566 | Fair |
| SD1806 over Ck | 1963 | 1,566 | Fair |
| SD1806 over Draw | 2010 | 1,566 | Good |
| US014 over Frozenman Ck | 2002 | 1,406 | Good |
| US014 over Willow Ck | 1984 | 1,406 | Good |
| US014 over Wagon Hound Ck | 2002 | 1,052 | Fair |
| US014 over Cottonwood Ck | 1960 | 624 | Fair |
| US014 over Plum Ck | 1960 | 624 | Fair |
| US014 over Ck | 1960 | 624 | Fair |
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.