Bridge conditions in Eaton County, Michigan
202 inventoried bridges · 11 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 202 bridges in Eaton County: 63 rated good, 128 fair, and 11 poor.
- 11 of the 202 bridges in Eaton County, Michigan, are rated in poor condition (5.4%) in the 2025 National Bridge Inventory, as of .
- 63 bridges (31.2%) are rated good and 128 (63.4%) fair.
- The median Eaton County bridge was built in 1981.
- The busiest poor-rated bridge is M-43 (W Saginaw) over Carrier Creek (built 1956), carrying about 26,200 vehicles a day.
Good 31.2% · Fair 63.4% · Poor 5.4% of 202 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 |
|---|---|---|---|
| M-43 (W Saginaw) over Carrier Creek | 1956 | 26,200 | Poor |
| Webster Road over Grand River | 1966 | 5,860 | Poor |
| St Joseph Hwy over I-96 | 1962 | 2,850 | Poor |
| Vermontville Hwy over Little Thornapple River | 1942 | 2,581 | Poor |
| Old US-27 over Big Creek | 1936 | 2,466 | Poor |
| Butterfield Road over Indian Creek | 1958 | 519 | Poor |
| Coats Road over Battle Creek River | 1923 | 200 | Poor |
| Shaytown Road over Sebewa Creek | 1910 | 91 | Poor |
| Harris Road over Indian Creek | 1982 | 90 | Poor |
| Gresham Hwy over Thornapple River | 1953 | 77 | Poor |
| Bismark Hwy over Sebewa Creek | 1921 | 72 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-96 WB over Grand Riv & Billwood Hwy | 2023 | 47,900 | Good |
| I-96 EB over M-43 | 1962 | 31,250 | Fair |
| I-96 WB over M-43 | 1962 | 31,250 | Fair |
| Otto Road over I-69 | 1989 | 27,800 | Fair |
| I-96 EB over Grand River | 1962 | 27,100 | Fair |
| I-96 WB over Grand River | 1962 | 27,100 | Fair |
| M-43 (W Saginaw) over Carrier Creek | 1956 | 26,200 | Poor |
| I-96 EB over Grand Riv & Billwood Hwy | 2024 | 23,950 | Good |
| I-496 WB over Waverly Rd | 1969 | 22,213 | Fair |
| I-496 EB over Waverly Rd | 1969 | 22,213 | 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.