Bridge conditions in Crawford County, Michigan
55 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 55 Crawford County bridges in the federal inventory, 6 carry a poor rating. That 10.9% share is roughly 2x the national average.
- 6 of the 55 bridges in Crawford County, Michigan, are rated in poor condition (10.9%) in the 2025 National Bridge Inventory, as of .
- 9 bridges (16.4%) are rated good and 40 (72.7%) fair.
- The median Crawford County bridge was built in 1967.
- The busiest poor-rated bridge is I-75 SB over Lake State RR (built 1961), carrying about 5,877 vehicles a day.
Good 16.4% · Fair 72.7% · Poor 10.9% of 55 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 SB over Lake State RR | 1961 | 5,877 | Poor |
| I-75 NB over Lake State RR | 1961 | 5,877 | Poor |
| I-75 SB over M-72|huron St | 1961 | 5,877 | Poor |
| I-75 NB over M-72|huron St | 1961 | 5,877 | Poor |
| County Rd 612 over N Br Au Sable River | 1961 | 409 | Poor |
| N Down River Rd over Big Creek | 1948 | 261 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75bl|m-72|n Jame over Au Sable River | 1935 | 13,375 | Fair |
| M-72|m-93 over Au Sable River | 1993 | 11,731 | Fair |
| I-75 SB over S Grayling Rd | 1970 | 11,000 | Fair |
| I-75 NB over S Grayling Rd | 1970 | 11,000 | Fair |
| I-75 NB over E Br Au Sable River | 1961 | 9,772 | Fair |
| I-75 NB over Lewiston Grade Road | 1961 | 9,772 | Fair |
| I-75 SB over Lewiston Grade Road | 1961 | 9,772 | Fair |
| I-75 SB over US-127 NB | 1962 | 9,649 | Fair |
| I-75 NB over Au Sable River | 1960 | 8,126 | Fair |
| I-75 SB over Au Sable River | 1960 | 8,125 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Michigan: Michigan bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.