318 Avenue over S Fork Medicine Knoll Ck
Hughes County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 318 Avenue over S Fork Medicine Knoll Ck in Hughes County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2008, making it 17 years old at the 2025 inventory.
- It carries about 150 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 17 of the 40 inventoried bridges in Hughes County rated good (42.5%); 8 (20.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (44.51079, -99.80514)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 38 ft |
| Location | 3.0 W & 0.6 S Harrold |
| NBI structure number | 000000033380021 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Hughes 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 |
All bridges nearby: Hughes County, SD bridge conditions · every bridge in Hughes County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.