Bridge conditions in Hughes County, South Dakota
40 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 5 bridges in Hughes County is rated in poor condition: 8 of 40 on the federal inventory, one of the higher shares in South Dakota.
- 8 of the 40 bridges in Hughes County, South Dakota, are rated in poor condition (20.0%) in the 2025 National Bridge Inventory, as of .
- 17 bridges (42.5%) are rated good and 15 (37.5%) fair.
- The median Hughes County bridge was built in 1969.
- The busiest poor-rated bridge is Capitol Ave over Capitol Lake Outlet (built 1950), carrying about 7,155 vehicles a day.
Good 42.5% · Fair 37.5% · Poor 20.0% of 40 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 |
|---|---|---|---|
| Capitol Ave over Capitol Lake Outlet | 1950 | 7,155 | Poor |
| SD034 over Chapelle Ck | 1949 | 691 | Poor |
| 321 Avenue over Chapelle Ck | 1963 | 99 | Poor |
| 311 Avenue over South Medicine Ck | 1964 | 96 | Poor |
| 310 Avenue over North Medicine Ck | 1934 | 33 | Poor |
| 314 Avenue over Chapelle Ck | 1961 | 33 | Poor |
| Adams Street over Ck | 1925 | 20 | Poor |
| 314 Avenue over South Medicine Ck | 1961 | 13 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US014 over Missouri Rv | 2024 | 15,450 | Good |
| US014 B over Hilgers Gulch | 1969 | 13,755 | Fair |
| Capitol Ave over Capitol Lake Outlet | 1950 | 7,155 | Poor |
| Broadway Ave over Hilgers Gulch | 1964 | 6,045 | Fair |
| Dakota Avenue over Hilgers Gulch | 1995 | 2,315 | Fair |
| US014 over Ck | 1985 | 2,004 | Good |
| US014 over North Medicine Ck | 1985 | 1,914 | Good |
| US014 over South Medicine Ck | 1951 | 1,914 | Fair |
| SD034 over Dry Run Ck | 1955 | 1,578 | Fair |
| SD034 over Mush Ck | 1954 | 1,578 | 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.