US012 over Burlington Northern RR
Edmunds County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US012 over Burlington Northern RR in Edmunds County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 3,329 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 8 of the 20 inventoried bridges in Edmunds County rated fair (40.0%); 5 (25.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: superstructure 5 to 6.
- Its most recent inspection on record is dated July 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 → (45.43948, -98.75176)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 249 ft |
| Location | at Mina |
| NBI structure number | 000000023465105 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Edmunds County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US012 over Preachers Run Ck | 1974 | 3,329 | Fair |
| US012 over Ck | 1974 | 2,666 | Poor |
| US012 over BNSF RR | 2006 | 2,068 | Good |
| SD045 over Ck | 1986 | 660 | Fair |
| SD045 over Ck | 1992 | 391 | Good |
| SD045 over Ck | 1992 | 391 | Good |
All bridges nearby: Edmunds County, SD bridge conditions · every bridge in Edmunds County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.