US081 over Missouri Rv
Yankton County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US081 over Missouri Rv in Yankton County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 2007, making it 18 years old at the 2025 inventory.
- It carries about 7,755 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 44 of the 99 inventoried bridges in Yankton County rated fair (44.4%); 13 (13.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 6 to 5, substructure 6 to 7.
- Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
- 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 → (42.867, -97.397)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 5 | Fair condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 6 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 1,592 ft |
| Location | US081 NE Border |
| NBI structure number | 000000068120210 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Yankton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US081 over Marne Ck | 1959 | 16,870 | Fair |
| SD050 over Marne Ck | 1971 | 9,753 | Fair |
| SD052 over Ck | 1988 | 6,711 | Fair |
| W 21ST Street over Marne Creek | 1973 | 6,324 | Good |
| Burleigh Street over Marne Creek | 1989 | 4,996 | Good |
| SD050 over Marne Ck | 1980 | 4,096 | Good |
All bridges nearby: Yankton County, SD bridge conditions · every bridge in Yankton County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.