SD037 N over Cain Ck
Beadle County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD037 N over Cain Ck in Beadle 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 1970, making it 55 years old at the 2025 inventory.
- It carries about 1,528 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 71 of the 150 inventoried bridges in Beadle County rated fair (47.3%); 40 (26.7%) 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 7 to 6.
- Its most recent inspection on record is dated May 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 → (44.26004, -98.21357)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 171 ft |
| Location | 4.4 N Sanborn Co Line |
| NBI structure number | 000000003240257 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Beadle County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Third Street over James Rv | 1982 | 4,828 | Fair |
| US014 over James Rv | 1960 | 3,601 | Poor |
| US014 over Cain Ck | 1976 | 2,802 | Fair |
| 387TH Avenue over Cain Creek | 1935 | 2,600 | Fair |
| US014 W over Ravine Lk | 1960 | 2,472 | Fair |
| US014 E over Ravine Lk | 1960 | 2,472 | Fair |
All bridges nearby: Beadle County, SD bridge conditions · every bridge in Beadle County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.