Bridge conditions in Haakon County, South Dakota
69 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 69 Haakon County bridges in the federal inventory, 8 carry a poor rating. That 11.6% share is roughly 2x the national average.
- 8 of the 69 bridges in Haakon County, South Dakota, are rated in poor condition (11.6%) in the 2025 National Bridge Inventory, as of .
- 23 bridges (33.3%) are rated good and 38 (55.1%) fair.
- The median Haakon County bridge was built in 1970.
- The busiest poor-rated bridge is US014 over Belcher Ck (built 1955), carrying about 660 vehicles a day.
Good 33.3% · Fair 55.1% · Poor 11.6% of 69 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 |
|---|---|---|---|
| US014 over Belcher Ck | 1955 | 660 | Poor |
| Irr SD034 over Cheyenne Rv | 1962 | 567 | Poor |
| 10 Mile Road over Mexican Ck | 1950 | 58 | Poor |
| Fas 6253 over North Fork Bad Rv | 1950 | 48 | Poor |
| Fas 6253 over Ash Ck | 1955 | 48 | Poor |
| Four Corners Road over Cheyenne Rv | 1930 | 45 | Poor |
| Main Street over Mitchell Ck | 1955 | 45 | Poor |
| County Rd over Ck | 1941 | 30 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US014 over Ck | 1955 | 978 | Fair |
| US014 over Ck | 1955 | 978 | Fair |
| US014 over North Fork Bad Rv | 1995 | 978 | Fair |
| SD073 over West Plum Ck | 1990 | 700 | Fair |
| SD073 over Grindstone Ck | 1954 | 700 | Fair |
| US014 over Ck | 1954 | 660 | Fair |
| US014 over Grindstone Ck | 2024 | 660 | Good |
| US014 over Belcher Ck | 1955 | 660 | Poor |
| US014 over Wilburn Ck | 2024 | 660 | Good |
| US014 over Medicine Ck | 1994 | 660 | 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.