Bridge conditions in Clark County, South Dakota
21 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 21 bridges in Clark County: 11 rated good, 9 fair, and 1 poor.
- 1 of the 21 bridges in Clark County, South Dakota, are rated in poor condition (4.8%) in the 2025 National Bridge Inventory, as of .
- 11 bridges (52.4%) are rated good and 9 (42.9%) fair.
- The median Clark County bridge was built in 2012.
- The busiest poor-rated bridge is 419TH Avenue over Creek (built 1983), carrying about 39 vehicles a day.
Good 52.4% · Fair 42.9% · Poor 4.8% of 21 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 |
|---|---|---|---|
| 419TH Avenue over Creek | 1983 | 39 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| 414TH Avenue over Creek | 1956 | 450 | Fair |
| 414TH Avenue over Creek | 1956 | 389 | Fair |
| SD028 over Shue Ck | 2016 | 302 | Fair |
| SD028 over Br Shue Ck | 2016 | 302 | Fair |
| 414TH Avenue over Creek | 1956 | 245 | Good |
| 414TH Avenue over Fordham Creek | 1956 | 236 | Fair |
| 415TH Avenue over Creek | 1949 | 182 | Fair |
| 415TH Avenue over Creek | 1949 | 176 | Fair |
| 414TH Avenue over Creek | 1956 | 158 | Good |
| 415TH Ave over Foster Creek | 2024 | 140 | 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.