Hillsdale County Bridge Report Card
Hillsdale County scores 44 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Hillsdale County, Michigan
Hillsdale County has 104 bridges in the National Bridge Inventory, with 15 rated poor and 21 rated scour-critical. Its poor-condition share of 14.4% is above the 11.0% statewide average. Poor-condition bridges carry about 8,329 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Hillsdale County a Bridge Condition Exposure Score of 44/100 (F). The county has 104 bridges in the National Bridge Inventory, including 15 in poor condition and 21 rated scour-critical. Poor-condition bridges carry about 8,329 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 | 14.4% | 28.8 |
| Poor-condition traffic exposure | 25 | 8.7% of measured traffic | 6.5 |
| Scour-critical bridge share | 20 | 20.2% | 20.0 |
| Average age vs national baseline | 10 | 50 years vs 48 nationally | 0.9 |
| Traffic-data completeness | 5 | 95,679 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 | 14.4% |
| State Poor-Condition Share | 11.0% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 20.2% |
| Average Bridge Age | 50 years |
| Poor-Condition Traffic Exposure | 8,329 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Hillsdale County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Us-127 over Blanchard Drain | Poor condition + traffic exposure | Poor | 3,056 | 1948 |
| Territorial Road over Woolace Martn Walters DR | Poor condition + traffic exposure | Poor | 976 | 1936 |
| Reading Road over E Br ST Joseph Of Maumee | Poor condition + traffic exposure | Poor | 579 | 1935 |
| Mosherville Road over S Br Kalamazoo River | Poor condition + traffic exposure | Poor | 506 | 1947 |
| Hartley Road over E Br ST Joseph Of Maumee | Poor condition + traffic exposure | Poor | 282 | 1947 |
| Lickley Road over Newton Drain | Poor condition + traffic exposure | Poor | 50 | 1920 |
| Elm Road over Mallory Lake Drain | Poor condition + traffic exposure | Poor | 46 | 1910 |
| Tripp Road over Laird Creek | Poor condition + traffic exposure | Poor | 37 | 1920 |
| Tuttle Road over E Br ST Joseph Of Maumee | Poor condition + traffic exposure | Poor | 22 | 1910 |
| M-49 over ST Joseph River | Poor condition + traffic exposure | Poor | 2,262 | 1985 |
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.