Bridge conditions in Douglas County, South Dakota
44 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 6 bridges in Douglas County is rated in poor condition: 7 of 44 on the federal inventory, one of the higher shares in South Dakota.
- 7 of the 44 bridges in Douglas County, South Dakota, are rated in poor condition (15.9%) in the 2025 National Bridge Inventory, as of .
- 19 bridges (43.2%) are rated good and 18 (40.9%) fair.
- The median Douglas County bridge was built in 1976.
- The busiest poor-rated bridge is Irr US018 over Creek (built 1961), carrying about 556 vehicles a day.
Good 43.2% · Fair 40.9% · Poor 15.9% of 44 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 |
|---|---|---|---|
| Irr US018 over Creek | 1961 | 556 | Poor |
| 39280 284 St over Br Choteau Ck | 1925 | 330 | Poor |
| 38830 280 St over Andes Ck | 1950 | 206 | Poor |
| 38840 278 St over Andes Ck | 1972 | 30 | Poor |
| 39530 271 St over Ck | 1980 | 25 | Poor |
| 40340 287 St. over Ck | 1912 | 20 | Poor |
| 27140 404 Ave over Ck | 1985 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD044 over Choteau Ck | 1961 | 1,785 | Fair |
| SD044 over Br Choteau Ck | 1960 | 1,785 | Good |
| SD044 over Andes Ck | 1957 | 1,516 | Fair |
| US281 over Ck | 1998 | 1,232 | Good |
| Irr US018 over Creek | 1961 | 556 | Poor |
| Irr US018 over Branch of Choteau Ck | 1961 | 556 | Fair |
| US018 over Oak Hollow Ck | 1961 | 556 | Fair |
| 38820 273 St over Andes Ck | 1950 | 526 | Fair |
| 28470 401 Ave over Ck | 1940 | 424 | Good |
| 39550 280 St over Choteau Ck | 2023 | 407 | 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.