297 Street over Ck
Gregory County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 297 Street over Ck in Gregory County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1920, making it 105 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 5 of the 51 inventoried bridges in Gregory County rated poor (9.8%); 5 (9.8%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (43.09675, -99.20007)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 3 | Serious condition |
Bridge details
| Structure | Masonry culvert |
| Length | about 40 ft |
| Location | 1S & 0.1W Herrick |
| NBI structure number | 000000027169280 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Gregory County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| 345 Avenue over South Fork Whetstone Ck | 2001 | 560 | Good |
| SD047 over Ck | 1957 | 552 | Fair |
| SD047 over Ck | 1957 | 552 | Fair |
| SD044 over Bull Ck | 1971 | 540 | Good |
| SD044 over Lone Tree Ck | 1971 | 540 | Fair |
| SD044 over Dixon Ck | 1971 | 540 | Fair |
All bridges nearby: Gregory County, SD bridge conditions · every bridge in Gregory County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.