SD037 over Ck
Bon Homme County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD037 over Ck in Bon Homme County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1959, making it 66 years old at the 2025 inventory.
- It carries about 1,375 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 66 of the 126 inventoried bridges in Bon Homme County rated fair (52.4%); 34 (27.0%) are rated poor.
- 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 → (42.99954, -97.97095)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 118 ft |
| Location | 0.3 N Jct Sd 50 |
| NBI structure number | 000000005100118 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Bon Homme County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD050 over Drainage Ditch | 1955 | 2,674 | Good |
| SD050 over Snatch Ck | 1956 | 2,649 | Fair |
| SD050 over Charley Ck | 1979 | 2,510 | Good |
| SD050 over West Br Emanuel Ck | 1960 | 2,498 | Fair |
| SD050 over Emanuel Ck | 1960 | 2,498 | Fair |
| SD037 over Unnamed Ck | 2019 | 1,604 | Good |
All bridges nearby: Bon Homme County, SD bridge conditions · every bridge in Bon Homme County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.