SD047 over South Medicine Ck
Hyde County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD047 over South Medicine Ck in Hyde County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1959, making it 66 years old at the 2025 inventory.
- It carries about 543 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 10 of the 23 inventoried bridges in Hyde County rated fair (43.5%); 5 (21.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated April 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (44.48563, -99.44076)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | 2.8 S Jct US 14 |
| NBI structure number | 000000035110279 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Hyde County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr SD034 over West Fork Elm Ck | 1955 | 918 | Fair |
| Irr SD034 over Campbell Ck | 1963 | 918 | Poor |
| Irr SD034 over Draw | 2001 | 604 | Good |
| Irr SD034 over West Fork Elm Ck | 2001 | 604 | Good |
| Irr Ar SD047 over Br West Fork Elm Ck | 1959 | 405 | Fair |
| Irr Ar SD047 over Br West Fork Elm Ck | 1959 | 405 | Poor |
All bridges nearby: Hyde County, SD bridge conditions · every bridge in Hyde County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.