483 Avenue over Cobb Ck
Deuel County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 483 Avenue over Cobb Ck in Deuel County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1956, making it 69 years old at the 2025 inventory.
- It carries about 280 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 16 of the 72 inventoried bridges in Deuel County rated good (22.2%); 13 (18.1%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (44.73292, -96.54134)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 83 ft |
| Location | 12N Astoria |
| NBI structure number | 000000020170170 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Deuel County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I029 over Deer Ck | 1971 | 7,560 | Fair |
| I029 S over 471 Ave | 1973 | 4,870 | Fair |
| I029 N over 471 Ave | 1973 | 4,870 | Fair |
| I029 S over Peg Munky Run Ck | 1973 | 4,870 | Fair |
| I029 N over Peg Munky Run Ck | 1973 | 4,870 | Fair |
| I029 S over 184 St | 1973 | 4,830 | Fair |
All bridges nearby: Deuel County, SD bridge conditions · every bridge in Deuel County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.