40430 308TH Street over Choteau Creek
Bon Homme County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 40430 308TH Street over Choteau Creek in Bon Homme County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 2 (critical condition) on the 0-9 scale.
- It was built in 1912, making it 113 years old at the 2025 inventory.
- It carries about 60 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 34 of the 126 inventoried bridges in Bon Homme County rated poor (27.0%); 34 (27.0%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.92346, -98.10642)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 3 | Serious condition |
| Superstructure | 2 | Critical condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Steel through truss |
| Length | about 112 ft |
| Location | 6S & 1.8W of Avon |
| NBI structure number | 000000005032170 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Bon Homme County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD050 over Drainage Ditch | 1955 | 2,674 | Good |
| SD050 over Snatch Ck | 1956 | 2,649 | Fair |
| SD050 over Charley Ck | 1979 | 2,510 | Good |
| SD050 over West Br Emanuel Ck | 1960 | 2,498 | Fair |
| SD050 over Emanuel Ck | 1960 | 2,498 | Fair |
| SD037 over Unnamed Ck | 2019 | 1,604 | Good |
All bridges nearby: Bon Homme County, SD bridge conditions · every bridge in Bon Homme County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.