Bridge conditions in Moody County, South Dakota
88 inventoried bridges · 18 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 5 bridges in Moody County is rated in poor condition: 18 of 88 on the federal inventory, one of the higher shares in South Dakota.
- 18 of the 88 bridges in Moody County, South Dakota, are rated in poor condition (20.5%) in the 2025 National Bridge Inventory, as of .
- 28 bridges (31.8%) are rated good and 42 (47.7%) fair.
- The median Moody County bridge was built in 1967.
- The busiest poor-rated bridge is I029 S over Big Sioux Rv (built 1966), carrying about 7,985 vehicles a day.
Good 31.8% · Fair 47.7% · Poor 20.5% of 88 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 |
|---|---|---|---|
| I029 S over Big Sioux Rv | 1966 | 7,985 | Poor |
| I029 N over Big Sioux Rv | 1966 | 7,985 | Poor |
| 223RD Street over Big Sioux Rv | 1922 | 100 | Poor |
| 221ST Street over Trib. to Big Sioux River | 1915 | 69 | Poor |
| 221ST Street over Spring Creek | 1915 | 69 | Poor |
| 471ST Avenue over Bachelor Creek | 1997 | 50 | Poor |
| 221ST Street over Trib. to Big Sioux River | 1915 | 50 | Poor |
| 226TH Street over Spring Creek | 1978 | 50 | Poor |
| 243RD Avenue over West Pipestone Creek | 1990 | 50 | Poor |
| 221ST Street over Lake Campbell Inlet | 1978 | 45 | Poor |
| 238TH Street over Brookfield Creek | 1920 | 45 | Poor |
| 224TH Street over Spring Creek | 1930 | 45 | Poor |
| 237TH Street over Big Sioux River | 1976 | 35 | Poor |
| 242ND Street over Big Sioux River | 1983 | 20 | Poor |
| 238TH Street over Trib. to Bachelor Creek | 1950 | 15 | Poor |
| 487TH Avenue over Flandreau Creek | 1982 | 15 | Poor |
| 231ST Street over Trib. to Jack Moore Crk | 1950 | 10 | Poor |
| Crescent Street over Big Sioux River | 1935 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I029 S over 243 St | 1963 | 10,190 | Fair |
| I029 N over 243 St | 1963 | 10,190 | Fair |
| I029 S over 238 St | 1963 | 10,030 | Fair |
| I029 S over Bachelor Ck | 1964 | 10,030 | Fair |
| I029 N over 238 St | 1963 | 10,030 | Fair |
| I029 N over Bachelor Ck | 1964 | 10,030 | Fair |
| I029 S over Big Sioux Rv | 1966 | 7,985 | Poor |
| I029 S over 223 St (fas) | 1966 | 7,985 | Fair |
| I029 N over Big Sioux Rv | 1966 | 7,985 | Poor |
| I029 N over 223 St (fas) | 1966 | 7,985 | 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.