Irr Bia Rte 5 over Counselor Creek
Lyman County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 5 over Counselor Creek in Lyman 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 1965, making it 60 years old at the 2025 inventory.
- It carries about 663 vehicles a day (traffic count year 2024).
- It is one of 12 of the 114 inventoried bridges in Lyman County rated poor (10.5%); 12 (10.5%) 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 → (44.02961, -99.51597)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 4 | Poor condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Concrete channel beam |
| Length | about 94 ft |
| Location | 6.8 Km SE of Lower Brule |
| NBI structure number | 00000000000A058 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Lyman County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I090 W over SD090 L | 1971 | 4,382 | Good |
| I090 E over SD090 L | 1971 | 4,382 | Good |
| I090 W over SD273 | 1970 | 3,955 | Fair |
| I090 E over SD273 | 1970 | 3,955 | Fair |
| I090 W over 319 Ave | 1971 | 3,955 | Fair |
| I090 E over 319 Ave | 1971 | 3,955 | Fair |
All bridges nearby: Lyman County, SD bridge conditions · every bridge in Lyman County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.