SD079N over Beaver Ck
Custer County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD079N over Beaver Ck in Custer County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1957 and reconstructed in 2006, making it 68 years old at the 2025 inventory.
- It carries about 2,289 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 42 of the 94 inventoried bridges in Custer County rated fair (44.7%); 5 (5.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated April 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (43.51245, -103.32713)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 186 ft |
| Location | 2.7 N Fall River Co Line |
| NBI structure number | 000000017368246 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Custer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US016 over French Ck | 1966 | 10,052 | Fair |
| US016 over Ck | 1966 | 10,052 | Good |
| US016A over Laughing Water Ck | 1964 | 6,829 | Good |
| SD079 over Battle Ck | 1997 | 6,610 | Good |
| US016 over French Ck | 1974 | 3,709 | Fair |
| US016 over French Ck | 1974 | 3,709 | Fair |
All bridges nearby: Custer County, SD bridge conditions · every bridge in Custer County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.