SD042 over Trib West Fork Verm Rv
McCook County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD042 over Trib West Fork Verm Rv in McCook County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1998, making it 27 years old at the 2025 inventory.
- It carries about 1,614 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 44 of the 98 inventoried bridges in McCook County rated good (44.9%); 7 (7.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: culvert 8 to 7.
- Its most recent inspection on record is dated August 2024, on a 48-month routine inspection cycle.
- 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 → (43.54348, -97.30452)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 8 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 26 ft |
| Location | 4.2E Jct US 81 |
| NBI structure number | 000000044152210 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 48 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 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.