Bridge conditions in Washtenaw County, Michigan
262 inventoried bridges · 47 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Washtenaw County has 47 bridges rated poor out of 262 inventoried, a 17.9% share that puts it well above the national rate of about 7%.
- 47 of the 262 bridges in Washtenaw County, Michigan, are rated in poor condition (17.9%) in the 2025 National Bridge Inventory, as of .
- 64 bridges (24.4%) are rated good and 151 (57.6%) fair.
- The median Washtenaw County bridge was built in 1972.
- The busiest poor-rated bridge is US-23NB I-94BL over Packard Rd (built 1962), carrying about 39,120 vehicles a day.
Good 24.4% · Fair 57.6% · Poor 17.9% of 262 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-23NB I-94BL over Packard Rd | 1962 | 39,120 | Poor |
| US-23SB I-94BL over Packard Rd | 1962 | 39,120 | Poor |
| US-23 NB over US-23 Br | 1962 | 39,120 | Poor |
| US-23 SB over US-23 Br | 1962 | 39,120 | Poor |
| US-23 NB over Huron River Drive | 1962 | 37,373 | Poor |
| US-23 SB over Huron River Drive | 1962 | 37,373 | Poor |
| US-23 SB M-14 EB over Mdot RR Corridor | 1962 | 36,627 | Poor |
| US-23 Sb/m-14 EB over M-14 W | 1962 | 24,781 | Poor |
| US-12BR M-17 over Huron River | 1912 | 18,300 | Poor |
| Old Dixboro Road over Huron River | 1921 | 16,342 | Poor |
| Old Dixboro Road over Huron River | 1921 | 16,342 | Poor |
| E Medical Center over Norfolk Southern RR | 1982 | 15,356 | Poor |
| Wagner Rd over M-14 | 1966 | 12,183 | Poor |
| Leforge Street over Huron River | 1983 | 12,156 | Poor |
| Ellsworth Rd over US-23 | 1962 | 11,652 | Poor |
| Miller Rd over M-14 | 1966 | 8,611 | Poor |
| Plymouth Road over Flemming Creek | 1981 | 7,431 | Poor |
| Prospect Street over Conrail Railroad | 1979 | 7,000 | Poor |
| M-52 over I-94 | 1960 | 6,756 | Poor |
| Dexter-ann Arbr Rd over Honey Creek | 1975 | 6,651 | Poor |
| Willis Road over Paint Creek | 1924 | 6,209 | Poor |
| Main St-whitmore over Horseshoe Lake Outlet | 1920 | 5,803 | Poor |
| Cross Street over Huron River | 1984 | 5,000 | Poor |
| Ford Road over Fleming Creek | 1981 | 4,165 | Poor |
| Dexter-chelsea Rd over Letts Creek | 1983 | 3,320 | Poor |
| Duncan St over River Raisin | 1970 | 2,300 | Poor |
| Saline Waterworks over Wood Outlet Drain | 1964 | 2,015 | Poor |
| Cherry Hill Rd over Fleming Creek | 1980 | 1,941 | Poor |
| Newport Rd over M-14 | 1966 | 1,624 | Poor |
| Kalmbach Rd over I-94 | 1960 | 1,349 | Poor |
| Bemis over Paint Creek | 1964 | 449 | Poor |
| Parker Road over Trib to Mill Creek | 1968 | 300 | Poor |
| Merritt Rd over Paint Creek | 1965 | 230 | Poor |
| Sibley Road (east) over Letts Creek | 1968 | 200 | Poor |
| Bush Road over Letts Creek | 1968 | 200 | Poor |
| Hack Rd over Macon Creek | 1965 | 163 | Poor |
| Sharon Valley Rd over Raisin River | 1960 | 151 | Poor |
| Arkona Rd over Stonycreek | 1926 | 146 | Poor |
| Sheridan Road over Iron Creek | 1960 | 138 | Poor |
| Grass Rd over Bauerdrain | 1961 | 133 | Poor |
| Jerusalem Road over Mill Creek | 1974 | 129 | Poor |
| Mohart over North Macon Creek | 1956 | 112 | Poor |
| Liss Road over Paint Creek | 1924 | 112 | Poor |
| Sager Rd over Mill Creek | 1962 | 97 | Poor |
| Rosbolt Rd over Paint Creek | 1928 | 69 | Poor |
| Fuller Road over Sugarcreek | 1988 | 67 | Poor |
| Joy Road over Wagner Creek | 1970 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-94 over Huron River | 1971 | 102,776 | Fair |
| I-94 over Aa RR | 1954 | 78,348 | Fair |
| I-94 over Honey Creek | 2000 | 77,206 | Fair |
| US-23 over Horseshoe Lake Drain | 1956 | 66,750 | Fair |
| Gotfredson Road over M-14 | 1975 | 65,500 | Fair |
| M-14 & US-23 Br over Mdot RR Cor & Huron Rvr | 1956 | 59,888 | Fair |
| I-94 over I-94 Bl | 1956 | 55,510 | Fair |
| M-14 over Fleming Creek | 1976 | 51,334 | Fair |
| I-94 EB over Wiard Rd | 1958 | 42,518 | Fair |
| I-94 WB over Wiard Rd | 1958 | 42,518 | 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.