Bridge conditions in Ingham County, Michigan
241 inventoried bridges · 30 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Ingham County has 30 bridges rated poor out of 241 inventoried, a 12.4% share that puts it well above the national rate of about 7%.
- 30 of the 241 bridges in Ingham County, Michigan, are rated in poor condition (12.4%) in the 2025 National Bridge Inventory, as of .
- 40 bridges (16.6%) are rated good and 171 (71.0%) fair.
- The median Ingham County bridge was built in 1968.
- The busiest poor-rated bridge is I-496 WB over US-127 SB (built 1970), carrying about 39,163 vehicles a day.
Good 16.6% · Fair 71.0% · Poor 12.4% of 241 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-496 WB over US-127 SB | 1970 | 39,163 | Poor |
| I-496 EB over Red Cedar River & Ramp V | 1970 | 34,831 | Poor |
| I-496 EB over CSX RR & Trowbridge Rmp | 1963 | 34,668 | Poor |
| I-496 EB over Gtw RR | 1963 | 34,668 | Poor |
| I-496EB & US-127SB over I-96 WB | 1966 | 29,356 | Poor |
| I-496 EB over Forest Rd | 1963 | 29,013 | Poor |
| US-127 NB over Red Cedar Riv & Ramp V | 1964 | 24,173 | Poor |
| US-127 SB over Red Cedar Riv & Ramp V | 1964 | 24,173 | Poor |
| I-96 Bl over Gtw South St & Red Cedar | 1952 | 23,865 | Poor |
| I-96 EB over Deer Creek | 1962 | 23,287 | Poor |
| I-96 WB over Deer Creek | 1962 | 23,287 | Poor |
| M-43 WB (gr Riv) over US-127 | 1970 | 20,897 | Poor |
| Harrison Road over Red Cedar River | 1937 | 18,646 | Poor |
| US-127 NB over College Rd | 1966 | 16,286 | Poor |
| M-43 over Red Cedar River | 1924 | 13,900 | Poor |
| Aurelius Road over Pawlowski Creek Drain | 1978 | 13,294 | Poor |
| Ramp T over CSX RR & Holmes St | 1969 | 7,766 | Poor |
| M-36 over Sycamore Creek | 1918 | 5,910 | Poor |
| College Rd over I-96 | 1963 | 5,200 | Poor |
| Hagadorn Road over Mud Creek | 1937 | 3,876 | Poor |
| E Elm Street over Red Cedar River | 1980 | 2,000 | Poor |
| Eifert Rd over W Aurelius Drain | 1975 | 600 | Poor |
| Noble Road over Deer Creek | 1925 | 490 | Poor |
| Linn Road over Doan Creek | 1964 | 300 | Poor |
| Gale Road over Columbia Creek | 1978 | 250 | Poor |
| Dennis Road over West Cedar Drain | 1900 | 250 | Poor |
| Curtice Rd over Columbia Creek | 1969 | 200 | Poor |
| Frost Road over Deer Creek | 1921 | 100 | Poor |
| Small Acres Lane over Pine Lake Outlet Drain | 1925 | 10 | Poor |
| W Wallace Street over Deer Creek | 1945 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-96 over Kalamink Creek | 1962 | 48,560 | Fair |
| I-496 WB over Mount Hope Rd | 1963 | 41,388 | Fair |
| I-496 WB over Forest Rd | 1963 | 41,388 | Fair |
| I-496 WB over Jolly Rd | 1963 | 41,388 | Fair |
| I-496 WB over Red Cedar River & Ramp V | 1970 | 39,163 | Fair |
| I-496 WB over CSX RR & Trowbridge Rmp | 2024 | 39,163 | Good |
| I-496 WB over Gtw RR | 2024 | 39,163 | Good |
| I-496 WB over US-127 SB | 1970 | 39,163 | Poor |
| I-496 WB over US-127 SB Ramp | 1970 | 39,163 | Fair |
| I-496 WB over I-496 EB Ramp to I-96 EB | 1963 | 35,682 | 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.