M-15 over Butternut Creek
Genesee County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M-15 over Butternut Creek in Genesee County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1997, making it 28 years old at the 2025 inventory.
- It carries about 7,165 vehicles a day (traffic count year 2007).
- Its listed owner is the state highway agency.
- It is one of 89 of the 369 inventoried bridges in Genesee County rated good (24.1%); 53 (14.4%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (43.2024, -83.5203)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 38 ft |
| Location | 1.4 Mi N of M-57 |
| NBI structure number | 000000000002617 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Genesee County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-69 over CSX RR | 1971 | 96,200 | Fair |
| I-69 EB over M-54|s Dort Hwy | 2015 | 96,200 | Fair |
| I-69 over Gtw RR | 1971 | 93,000 | Fair |
| I-75 NB over Bristol Rd | 2005 | 89,742 | Fair |
| I-75 NB over Flushing Rd | 1958 | 76,600 | Fair |
| I-75 SB over Flushing Rd | 1958 | 76,600 | Fair |
All bridges nearby: Genesee County, MI bridge conditions · every bridge in Genesee County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.