Twnshp Rd 187TH St over Cobb Ck
Deuel County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Twnshp Rd 187TH St over Cobb Ck in Deuel County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1908, making it 117 years old at the 2025 inventory.
- It carries about 25 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 13 of the 72 inventoried bridges in Deuel County rated poor (18.1%); 13 (18.1%) 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 → (44.67425, -96.57456)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 4 | Poor condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel through truss |
| Length | about 71 ft |
| Location | 2.3 E & 1 N Brandt |
| NBI structure number | 000000020153210 |
| Condition class | Poor |
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.