Smithwick Road over Sand Ck
Fall River County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Smithwick Road over Sand Ck in Fall River County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1979, making it 46 years old at the 2025 inventory.
- It carries about 41 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 41 of the 80 inventoried bridges in Fall River County rated good (51.2%); 5 (6.2%) 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 → (43.30349, -103.21684)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 40 ft |
| Location | E. City Limit Smithwick |
| NBI structure number | 000000024423120 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Fall River County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US018 over Fall Rv | 2010 | 5,064 | Fair |
| US018 over Fall Rv | 2010 | 5,064 | Fair |
| US018 over Ck | 1968 | 4,913 | Fair |
| US385 over Fall Rv | 1998 | 4,898 | Good |
| US018 over Fall Rv | 1968 | 4,687 | Fair |
| SD079 over Elm Ck | 2006 | 4,214 | Fair |
All bridges nearby: Fall River County, SD bridge conditions · every bridge in Fall River County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.