SD034 over Drainage Ditch
Sanborn County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD034 over Drainage Ditch in Sanborn County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1936 and reconstructed in 1986, making it 89 years old at the 2025 inventory.
- It carries about 1,738 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 29 of the 54 inventoried bridges in Sanborn County rated fair (53.7%); 7 (13.0%) 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 → (44.05414, -98.25159)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | 0.9 E of Woonsocket |
| NBI structure number | 000000056039100 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Sanborn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD034 W over James Rv | 2003 | 1,484 | Fair |
| SD034 E over James Rv | 2004 | 1,484 | Fair |
| SD037 S over Sand Ck | 1977 | 1,354 | Good |
| SD037 N over Sand Ck | 1976 | 1,354 | Good |
| SD037 S over James Rv | 2002 | 1,271 | Good |
| SD037 N over James Rv | 1992 | 1,271 | Good |
All bridges nearby: Sanborn County, SD bridge conditions · every bridge in Sanborn County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.