FAS6450 over Big Prairie Dog Ck
Stanley County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- FAS6450 over Big Prairie Dog Ck in Stanley 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 1992, making it 33 years old at the 2025 inventory.
- It carries about 47 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 13 of the 37 inventoried bridges in Stanley County rated good (35.1%); 6 (16.2%) 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 → (44.19726, -101.04057)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 21 ft |
| Location | 12M S & 1M W of Hayes Sd |
| NBI structure number | 000000059062400 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Stanley County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US083 over Bad Rv | 1956 | 6,040 | Fair |
| SD1806 over Ck | 1963 | 1,566 | Fair |
| SD1806 over Ck | 1963 | 1,566 | Fair |
| SD1806 over Draw | 2010 | 1,566 | Good |
| US014 over Frozenman Ck | 2002 | 1,406 | Good |
| US014 over Willow Ck | 1984 | 1,406 | Good |
All bridges nearby: Stanley County, SD bridge conditions · every bridge in Stanley County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.