Bridge conditions in Turner County, South Dakota
143 inventoried bridges · 38 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Turner County has 38 bridges rated poor out of 143 inventoried, a 26.6% share that puts it well above the national rate of about 7%.
- 38 of the 143 bridges in Turner County, South Dakota, are rated in poor condition (26.6%) in the 2025 National Bridge Inventory, as of .
- 51 bridges (35.7%) are rated good and 54 (37.8%) fair.
- The median Turner County bridge was built in 1991.
- The busiest poor-rated bridge is 45520 275 St over West Fork Vermillion Rv (built 1952), carrying about 758 vehicles a day.
Good 35.7% · Fair 37.8% · Poor 26.6% of 143 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 |
|---|---|---|---|
| 45520 275 St over West Fork Vermillion Rv | 1952 | 758 | Poor |
| 45650 275 St over East Fork Vermillion Rv | 1958 | 747 | Poor |
| 46220 275 St over Long Ck | 1977 | 570 | Poor |
| 46350 291 St. over Vermillion Rv | 1966 | 283 | Poor |
| 28650 461 Ave over Vermillion Rv | 1956 | 207 | Poor |
| 27220 444 Ave over Ck | 1950 | 100 | Poor |
| 27130 445 Ave over Ck | 1950 | 100 | Poor |
| 27150 446 Ave over Ck | 1945 | 100 | Poor |
| 29020 453 Ave over Ck | 1999 | 100 | Poor |
| 44960 274 St over West Fork Vermillion Rv | 1992 | 97 | Poor |
| 29610 457 Ave over Ck | 1945 | 97 | Poor |
| 45970 279 St. over Vermillion Rv | 1985 | 97 | Poor |
| 46020 282 St over Vermillion Rv | 1985 | 97 | Poor |
| 28820 463 Ave over Vermillion Rv | 1970 | 97 | Poor |
| 45060 283 St over Turkey Ridge Ck | 1958 | 66 | Poor |
| 45860 278 St over Vermillion Rv | 1940 | 65 | Poor |
| 27490 462 Ave over Long Ck | 1945 | 65 | Poor |
| 28320 445TH Ave over Turkey Ridge Ck | 1945 | 60 | Poor |
| 44280 283RD St over Ck | 1990 | 50 | Poor |
| 26890 443 Ave over Ck | 1950 | 50 | Poor |
| 44330 268 St over West Fork Vermillion Rv | 1988 | 50 | Poor |
| 28010 453 Ave over Ck | 1940 | 50 | Poor |
| 45370 277TH St over Ck | 1940 | 50 | Poor |
| 45380 271 St over East Fork Vermillion Rv | 1950 | 50 | Poor |
| 461 Ave. over Vermillion Rv | 1910 | 50 | Poor |
| 45340 272 St over Ck | 1939 | 35 | Poor |
| 456TH Ave over Elce Ck | 1934 | 35 | Poor |
| 27380 458 Ave over Camp Ck | 1930 | 31 | Poor |
| County Rd over Turkey Ridge Ck | 1913 | 30 | Poor |
| 45530 273 St over East Fork Vermillion Rv | 1910 | 30 | Poor |
| 45560 288TH St over Ck | 2001 | 30 | Poor |
| 45670 273 St over Elce Ck | 1945 | 30 | Poor |
| 27620 457 Ave over Vermillion Rv | 1985 | 25 | Poor |
| 27690 458 Ave over Elce Ck | 1950 | 25 | Poor |
| 46360 277 St over Long Ck | 1987 | 25 | Poor |
| 26930 442 Ave over Ck | 1950 | 10 | Poor |
| 28120 449 Ave over Drainage Ditch | 1930 | 10 | Poor |
| 28380 446 Ave over Turkey Ridge Ck | 1910 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD044 over BNSF RR | 1976 | 2,416 | Good |
| SD044 over West Fork Vermillion Rv | 1976 | 2,416 | Fair |
| SD044 over West Fork Vermillion Rv | 1976 | 2,416 | Fair |
| US018 over Vermillion Rv | 2013 | 1,836 | Good |
| US018 over Ck | 2018 | 1,836 | Good |
| SD044 over Ck | 1961 | 1,790 | Good |
| US018 over Hurley Ck | 2019 | 1,775 | Good |
| SD019 over East Fork Vermillion Rv | 1989 | 1,648 | Fair |
| SD019 over Ck | 1999 | 1,648 | Good |
| SD019 over West Fork Vermillion Rv | 1986 | 1,648 | 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.