Bridge conditions in Hillsdale County, Michigan
104 inventoried bridges · 15 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 104 Hillsdale County bridges in the federal inventory, 15 carry a poor rating. That 14.4% share is roughly 2x the national average.
- 15 of the 104 bridges in Hillsdale County, Michigan, are rated in poor condition (14.4%) in the 2025 National Bridge Inventory, as of .
- 28 bridges (26.9%) are rated good and 61 (58.7%) fair.
- The median Hillsdale County bridge was built in 1981.
- The busiest poor-rated bridge is US-127 over Blanchard Drain (built 1948), carrying about 3,056 vehicles a day.
Good 26.9% · Fair 58.7% · Poor 14.4% of 104 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 |
|---|---|---|---|
| US-127 over Blanchard Drain | 1948 | 3,056 | Poor |
| M-49 over St Joseph River | 1985 | 2,262 | Poor |
| Territorial Road over Woolace Martn Walters Dr | 1936 | 976 | Poor |
| Reading Road over E Br St Joseph of Maumee | 1935 | 579 | Poor |
| Mosherville Road over S Br Kalamazoo River | 1947 | 506 | Poor |
| Hartley Road over E Br St Joseph of Maumee | 1947 | 282 | Poor |
| Mauck Road over Beebe Creek | 1969 | 196 | Poor |
| Dimmers Road over E Fork W Br St Joseph Rv | 1970 | 141 | Poor |
| Squires Road over Soap Creek | 1960 | 96 | Poor |
| Lickley Road over Newton Drain | 1920 | 50 | Poor |
| Brott Road over Prouty Drain | 1948 | 48 | Poor |
| Elm Road over Mallory Lake Drain | 1910 | 46 | Poor |
| Tripp Road over Laird Creek | 1920 | 37 | Poor |
| Burt Road over Silver Creek | 1918 | 32 | Poor |
| Tuttle Road over E Br St Joseph of Maumee | 1910 | 22 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-12 over St Joseph River | 1999 | 15,669 | Fair |
| US-127 over Beecher Creek | 1991 | 5,142 | Fair |
| US-127 over Bean Creek | 1947 | 5,136 | Fair |
| US-127 over Bean Creek | 1947 | 5,136 | Fair |
| Fayette St over St Joseph River | 2022 | 3,798 | Good |
| US-127 over Blanchard Drain | 1948 | 3,056 | Poor |
| US-127 over Lime Creek | 1946 | 3,056 | Fair |
| M-49 over Little Hog Creek | 2023 | 2,975 | Good |
| M-49 over St Joseph River | 1985 | 2,262 | Poor |
| Concord Road over S Br Kalamazoo River | 1910 | 2,189 | 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.