266TH Avenue over Bad River
Jones County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 266TH Avenue over Bad River in Jones 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 1996, making it 29 years old at the 2025 inventory.
- It carries about 45 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 6 of the 37 inventoried bridges in Jones County rated good (16.2%); 2 (5.4%) 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 September 2024, on a 24-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 → (44.15057, -100.79796)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 209 ft |
| Location | 1.4S Stanley Co Line |
| NBI structure number | 000000038133014 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 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 Jones County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I090 W over 286 Ave (fas 6259) | 1970 | 3,825 | Good |
| I090 E over 286 Ave (fas 6259) | 1970 | 3,825 | Fair |
| I090 W over 279 Ave (fas 6500) | 1970 | 3,793 | Fair |
| I090 E over 279 Ave (fas 6500) | 1970 | 3,793 | Fair |
| I090 W over 282 Ave | 1970 | 3,793 | Fair |
| I090 E over 282 Ave | 1970 | 3,793 | Fair |
All bridges nearby: Jones County, SD bridge conditions · every bridge in Jones County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.