River Road over Little Missouri Rv
Harding County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- River Road over Little Missouri Rv in Harding County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2006, making it 19 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 25 of the 49 inventoried bridges in Harding County rated good (51.0%); 1 (2.0%) are rated poor.
- 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 → (45.77459, -103.88871)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | 3.7S 7.8W Ladner |
| NBI structure number | 000000032082122 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Harding County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US085 over South Fork Grand Rv | 1963 | 1,484 | Fair |
| US085 over Buffalo Ck | 1964 | 1,330 | Fair |
| US085 over Sheep Ck | 1963 | 1,248 | Fair |
| US085 over Jones Ck | 1960 | 1,248 | Fair |
| US085 over Bull Ck | 1960 | 1,248 | Fair |
| US085 over North Br Moreau Rv | 1974 | 1,190 | Fair |
All bridges nearby: Harding County, SD bridge conditions · every bridge in Harding County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.