I090 W over County Rd
Jackson County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I090 W over County Rd in Jackson County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1967, making it 58 years old at the 2025 inventory.
- It carries about 3,525 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 50 of the 89 inventoried bridges in Jackson County rated fair (56.2%); 13 (14.6%) are rated poor.
- 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 → (43.83616, -101.74096)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 119 ft |
| Location | 4.0 W Sd 73 N Interch |
| NBI structure number | 000000036200110 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Jackson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I090 over Br Big Buffalo Ck | 1968 | 6,560 | Fair |
| I090 W over Whitewater Ck | 1986 | 3,956 | Fair |
| I090 E over Whitewater Ck | 1973 | 3,956 | Fair |
| I090 W over SD073 Ck | 1967 | 3,552 | Fair |
| I090 E over SD073 Ck | 1967 | 3,552 | Good |
| I090 W over County Rd | 1967 | 3,552 | Fair |
All bridges nearby: Jackson County, SD bridge conditions · every bridge in Jackson County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.