221ST Street over Trib. to Big Sioux River
Moody County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 221ST Street over Trib. to Big Sioux River in Moody County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1915, making it 110 years old at the 2025 inventory.
- It carries about 69 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 18 of the 88 inventoried bridges in Moody County rated poor (20.5%); 18 (20.5%) 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 → (44.1817, -96.67838)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 3 | Serious condition |
| Substructure | 3 | Serious condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 29 ft |
| Location | 10.4W & 2N of Ward |
| NBI structure number | 000000051106010 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Moody County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I029 S over 243 St | 1963 | 10,190 | Fair |
| I029 N over 243 St | 1963 | 10,190 | Fair |
| I029 S over 238 St | 1963 | 10,030 | Fair |
| I029 S over Bachelor Ck | 1964 | 10,030 | Fair |
| I029 N over 238 St | 1963 | 10,030 | Fair |
| I029 N over Bachelor Ck | 1964 | 10,030 | Fair |
All bridges nearby: Moody County, SD bridge conditions · every bridge in Moody County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.