Bridge conditions in Lake County, Michigan
31 inventoried bridges · 5 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 6 bridges in Lake County is rated in poor condition: 5 of 31 on the federal inventory, one of the higher shares in Michigan.
- 5 of the 31 bridges in Lake County, Michigan, are rated in poor condition (16.1%) in the 2025 National Bridge Inventory, as of .
- 13 bridges (41.9%) are rated good and 13 (41.9%) fair.
- The median Lake County bridge was built in 1958.
- The busiest poor-rated bridge is Queens Highway over M Br Pere Marquette Riv (built 1904), carrying about 180 vehicles a day.
Good 41.9% · Fair 41.9% · Poor 16.1% of 31 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 |
|---|---|---|---|
| Queens Highway over M Br Pere Marquette Riv | 1904 | 180 | Poor |
| 40TH Street over Baldwin River | 1924 | 140 | Poor |
| Frank Smith Road over M Br Pere Marquette Riv | 1929 | 112 | Poor |
| 64TH Street over M Br Pere Marquette Riv. | 1909 | 34 | Poor |
| Peacock Road over Little Manistee River | 1929 | 30 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-37 over Pere Marquette River | 1922 | 4,771 | Fair |
| M-37 over Baldwin Creek | 1929 | 4,771 | Fair |
| US-10 over Baldwin Creek | 1931 | 3,813 | Fair |
| US-10 over Sanborn Creek | 1934 | 3,813 | Fair |
| M-37 over Little Manistee River | 1939 | 2,500 | Good |
| 56 Th Street FH32 over Pere Marquette River | 1997 | 1,400 | Good |
| 76 Th Street over So Br Pere Marquette Riv | 1998 | 1,000 | Good |
| S Branch Road over Pere Marquette River | 1957 | 1,000 | Fair |
| Irons Road FH35 over Little Manistee River | 1987 | 930 | Fair |
| Skookum over Pine River | 1958 | 780 | Good |
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.