Bridge conditions in Washtenaw County, Michigan 262 inventoried bridges · 47 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions 2025 National Bridge Inventory, FHWA Compiled August 20, 2026
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 August 20, 2026 .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.
Every bridge in Washtenaw County →
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 .