M 78 over Maple Creek
Steele County, Minnesota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M 78 over Maple Creek in Steele County, Minnesota, 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 1966, making it 59 years old at the 2025 inventory.
- It carries about 465 vehicles a day (traffic count year 1967).
- Its listed owner is a city or municipal highway agency.
- It is one of 52 of the 134 inventoried bridges in Steele County rated fair (38.8%); 5 (3.7%) 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 May 2023, 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 → (44.09499, -93.22356)
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 | Prestressed concrete stringer or multi-beam girder |
| Length | about 63 ft |
| Location | 0.1 Mi E of Jct Csah 1 |
| NBI structure number | 74511 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Steele County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 35 over Crane Creek | 1958 | 30,387 | Fair |
| I 35 over Ditch | 1964 | 21,305 | Fair |
| I 35 over Dme RR | 2014 | 17,891 | Good |
| I 35 over Dme RR | 2014 | 17,891 | Good |
| I 35 over Csah 34 | 1995 | 17,000 | Good |
| I 35 over Hoffman Drive NW | 2014 | 17,000 | Good |
All bridges nearby: Steele County, MN bridge conditions · every bridge in Steele County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.