SD037 over South Fork Twelve Mile C
Hutchinson County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD037 over South Fork Twelve Mile C in Hutchinson 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 2000, making it 25 years old at the 2025 inventory.
- It carries about 3,234 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 50 of the 160 inventoried bridges in Hutchinson County rated good (31.2%); 24 (15.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2022, on a 48-month routine inspection cycle.
- 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 → (43.49204, -97.99741)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 34 ft |
| Location | 0.5 S Davison Co Line |
| NBI structure number | 000000034060005 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2022 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Hutchinson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD037 over Pony Ck | 1992 | 3,971 | Good |
| SD037 over Ck | 2000 | 3,375 | Good |
| US081 over Ck | 1994 | 2,385 | Good |
| SD037 over North Br Dry Ck | 2000 | 2,259 | Good |
| SD037 over Drainage Ditch | 2000 | 2,259 | Good |
| SD037 over South Br Dry Ck | 2000 | 2,259 | Good |
All bridges nearby: Hutchinson County, SD bridge conditions · every bridge in Hutchinson County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.