Eaton County Bridge Report Card
Eaton County scores 70 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Eaton County, Michigan
Eaton County has 202 bridges in the National Bridge Inventory, with 11 rated poor and 17 rated scour-critical. Its poor-condition share of 5.4% is at or below the 11.0% statewide average. Poor-condition bridges carry about 41,006 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Eaton County a Bridge Condition Exposure Score of 70/100 (C). The county has 202 bridges in the National Bridge Inventory, including 11 in poor condition and 17 rated scour-critical. Poor-condition bridges carry about 41,006 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 5.4% | 10.9 |
| Poor-condition traffic exposure | 25 | 3.5% of measured traffic | 2.6 |
| Scour-critical bridge share | 20 | 8.4% | 16.8 |
| Average age vs national baseline | 10 | 47 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 1,185,865 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 5.4% |
| State Poor-Condition Share | 11.0% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 8.4% |
| Average Bridge Age | 47 years |
| Poor-Condition Traffic Exposure | 41,006 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Eaton County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Webster Road over Grand River | Poor condition + traffic exposure | Poor | 5,860 | 1966 |
| Vermontville HWY over Little Thornapple River | Poor condition + traffic exposure | Poor | 2,581 | 1942 |
| Old Us-27 over Big Creek | Poor condition + traffic exposure | Poor | 2,466 | 1936 |
| Shaytown Road over Sebewa Creek | Poor condition + traffic exposure | Poor | 91 | 1910 |
| M-43 (w Saginaw) over Carrier Creek | Poor condition + traffic exposure | Poor | 26,200 | 1956 |
| ST Joseph HWY over I-96 | Poor condition + traffic exposure | Poor | 2,850 | 1962 |
| Butterfield Road over Indian Creek | Poor condition + traffic exposure | Poor | 519 | 1958 |
| Coats Road over Battle Creek River | Poor condition + traffic exposure | Poor | 200 | 1923 |
| Harris Road over Indian Creek | Poor condition + traffic exposure | Poor | 90 | 1982 |
| Gresham HWY over Thornapple River | Poor condition + traffic exposure | Poor | 77 | 1953 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.