M-57 over Butternut Creek
Montcalm County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M-57 over Butternut Creek in Montcalm County, Michigan, 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 1940, making it 85 years old at the 2025 inventory.
- It carries about 5,487 vehicles a day (traffic count year 2007).
- Its listed owner is the state highway agency.
- It is one of 69 of the 121 inventoried bridges in Montcalm County rated fair (57.0%); 7 (5.8%) are rated poor.
- 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 → (43.17719, -84.8576)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 30 ft |
| Location | W of Carson City Limits |
| NBI structure number | 000000000007434 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Montcalm County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-131SB & M-46sb over Tamarack Creek | 1972 | 26,700 | Fair |
| US-131NB & M-46nb over Tamarack Creek | 1972 | 26,700 | Fair |
| US-131 & M-46 SB over Kendaville Rd | 1971 | 26,700 | Fair |
| US-131 & M-46 NB over Kendaville Rd | 1971 | 26,700 | Fair |
| M-57 over Flat River | 1948 | 11,727 | Good |
| M-91 over Flat River | 1994 | 11,433 | Fair |
All bridges nearby: Montcalm County, MI bridge conditions · every bridge in Montcalm County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.