Bridge conditions in Ionia County, Michigan
118 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 10 bridges in Ionia County is rated in poor condition: 12 of 118 on the federal inventory, one of the higher shares in Michigan.
- 12 of the 118 bridges in Ionia County, Michigan, are rated in poor condition (10.2%) in the 2025 National Bridge Inventory, as of .
- 37 bridges (31.4%) are rated good and 69 (58.5%) fair.
- The median Ionia County bridge was built in 1979.
- The busiest poor-rated bridge is I-96 WB over Portland Rd (built 1958), carrying about 19,963 vehicles a day.
Good 31.4% · Fair 58.5% · Poor 10.2% of 118 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 |
|---|---|---|---|
| I-96 WB over Portland Rd | 1958 | 19,963 | Poor |
| M-21 over Prairie Creek | 1929 | 8,456 | Poor |
| M-21 over Maple River | 1929 | 2,533 | Poor |
| Divine Highway over Lookingglass River | 1979 | 2,494 | Poor |
| Grand River Avenue over Libhart Creek | 1936 | 1,093 | Poor |
| Borden Rd over Prairie Creek | 1927 | 462 | Poor |
| Nickle Plate Rd over Maple River Flood | 1983 | 404 | Poor |
| Jackson Road over Unnamed Creek | 1993 | 321 | Poor |
| Reeder Road over Libhart Creek | 1975 | 152 | Poor |
| Peck Lake Road over Libhart Creek | 1982 | 128 | Poor |
| Huddle Road over Tupper Creek | 1923 | 123 | Poor |
| Bell Road over Duck Creek | 1970 | 40 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-96 over Portland Trail | 2013 | 35,000 | Good |
| I-96 over Libhart Creek | 1958 | 33,978 | Fair |
| I-96 EB over Kent Rd | 1959 | 20,074 | Fair |
| I-96 WB over Kent Rd | 1959 | 20,074 | Fair |
| I-96 EB over Okemos Rd | 1959 | 20,074 | Fair |
| I-96 WB over Okemos Rd | 1959 | 20,074 | Fair |
| I-96 EB over Charlotte Hwy | 1959 | 20,074 | Fair |
| I-96 WB over Charlotte Hwy | 1959 | 20,074 | Fair |
| I-96 EB over Grand River Ave | 1959 | 20,074 | Fair |
| I-96 WB over Grand River Ave | 1959 | 20,074 | 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.