448TH Avenue over Little Vermillion River
McCook County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 448TH Avenue over Little Vermillion River in McCook County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 173 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 7 of the 98 inventoried bridges in McCook County rated poor (7.1%); 7 (7.1%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (43.74894, -97.24944)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 4 | Poor condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 53 ft |
| Location | 1.7N & 7E of Salem |
| NBI structure number | 000000044180068 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in McCook County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I090 W over East Fork Vermillion Rv | 2022 | 6,819 | Good |
| I090 E over East Fork Vermillion Rv | 2021 | 6,819 | Good |
| I090 W over 453 Ave | 1964 | 6,819 | Good |
| I090 E over 453 Ave | 1964 | 6,819 | Good |
| I090 W over 448 Ave | 1964 | 6,752 | Good |
| I090 E over 448 Ave | 1964 | 6,752 | Good |
All bridges nearby: McCook County, SD bridge conditions · every bridge in McCook County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.