371ST Avenue over Willow Creek
McPherson County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 371ST Avenue over Willow Creek in McPherson 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 1990, making it 35 years old at the 2025 inventory.
- It carries about 95 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 10 of the 14 inventoried bridges in McPherson County rated fair (71.4%); 0 (0.0%) 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 → (45.69276, -98.76646)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Steel culvert |
| Length | about 22 ft |
| Location | 2.1 S & 8 E of Leola |
| NBI structure number | 000000045460171 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in McPherson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD010 over Foot Ck | 1957 | 770 | Fair |
| SD010 over Ck | 1957 | 770 | Fair |
| SD010 over North Br Willow Ck | 1957 | 770 | Fair |
| SD010 over Trib to Foot Ck | 2014 | 753 | Fair |
| SD045 over Ck | 1996 | 391 | Fair |
| SD045 over Ck | 1996 | 391 | Fair |
All bridges nearby: McPherson County, SD bridge conditions · every bridge in McPherson County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.