Bridge conditions in Minnehaha County, South Dakota
394 inventoried bridges · 36 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
36 of the 394 bridges the federal inventory lists in Minnehaha County are rated poor; the rest split 163 good and 195 fair.
- 36 of the 394 bridges in Minnehaha County, South Dakota, are rated in poor condition (9.1%) in the 2025 National Bridge Inventory, as of .
- 163 bridges (41.4%) are rated good and 195 (49.5%) fair.
- The median Minnehaha County bridge was built in 1991.
- The busiest poor-rated bridge is 49TH Street over Big Sioux River (built 1979), carrying about 13,800 vehicles a day.
Good 41.4% · Fair 49.5% · Poor 9.1% of 394 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.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I229 over Ck | 1959 | 43,830 | Fair |
| West 12TH Street over Big Sioux River | 1997 | 40,100 | Good |
| E 10TH St over I229 | 1995 | 35,954 | Fair |
| I229 over W 57TH St | 1995 | 34,780 | Good |
| I029 S over Skunk Ck | 1989 | 33,310 | Fair |
| I029 N over Skunk Ck | 1989 | 33,310 | Fair |
| I029 S over Ellis and Eastern RR | 2004 | 32,455 | Fair |
| I029 S over W 12TH St | 2006 | 32,455 | Good |
| I029 N over Ellis and Eastern RR | 2004 | 32,455 | Fair |
| I029 N over W 12TH St | 2006 | 32,455 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
Every bridge in Minnehaha County → - all 394, busiest first, each with its own condition record.
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.