Irr SD034 over East Fork Soldier Ck
Buffalo County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr SD034 over East Fork Soldier Ck in Buffalo County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1962, making it 63 years old at the 2025 inventory.
- It carries about 918 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 16 of the 25 inventoried bridges in Buffalo County rated fair (64.0%); 1 (4.0%) 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 → (44.08631, -99.43809)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 31 ft |
| Location | 7.3 S Hyde Co Line |
| NBI structure number | 000000009065074 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Buffalo County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Bia Rte 4 over Campbell Creek | 2013 | 1,720 | Good |
| SD045 over Crow Ck | 1960 | 949 | Fair |
| Irr SD050 over Wolf Ck | 1954 | 928 | Fair |
| Irr SD050 over Crow Ck | 1999 | 928 | Good |
| Irr SD047 over Soldier Ck | 1963 | 917 | Fair |
| SD045 over Crow Ck | 1958 | 755 | Fair |
All bridges nearby: Buffalo County, SD bridge conditions · every bridge in Buffalo County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.