| M-46 over Cheboygan & Branches Drn | Poor | 22.3 ft | 6,701 | 1939 |
| M-46 over Houghton Creek | Poor | 26.9 ft | 5,255 | 1939 |
| M-15 over Cheboyganing Creek | Poor | 30.8 ft | 2,842 | 1929 |
| M-46 over White Creek #2 | Poor | 26.9 ft | 2,547 | 1966 |
| Gilford Road over Br 1 Northwest Drain | Poor | 24.0 ft | 1,700 | 1972 |
| Oak Road over Gooding Creek | Poor | 22.6 ft | 510 | 1965 |
| Shabbona Road over Mud Creek Drain Outlet | Poor | 23.6 ft | 140 | 1974 |
| Loomis Road over Wiscoggin Drain | Poor | 46.9 ft | 135 | 1930 |
| Dodge Road over South Br White Creek | Poor | 42.0 ft | 120 | 1971 |
| Cass City Road over Southgate Drain | Poor | 24.0 ft | 77 | 1945 |
| M-25 over (no Name) Drain | Fair | 32.5 ft | 5,571 | 1932 |
| M-25 over Wisner Drain | Fair | 27.9 ft | 5,571 | 1985 |
| M-25 over Allen Drain | Fair | 37.7 ft | 5,571 | 1985 |
| M-25 over Akron Drain | Fair | 26.9 ft | 5,571 | 1985 |
| M-24 over Cass River | Fair | 419.9 ft | 5,516 | 1941 |
| M-46 over Cass River | Fair | 165.0 ft | 5,255 | 1934 |
| East Dayton Road over Cass River | Fair | 180.1 ft | 5,144 | 1976 |
| M-25 over Wiscoggin Creek | Fair | 85.0 ft | 5,044 | 2006 |
| M-15 over Goodings Creek | Fair | 49.2 ft | 4,811 | 2000 |
| M-24 over Kreger Drain | Fair | 23.6 ft | 4,188 | 1941 |
| Millington Road over Millington Creek | Fair | 47.9 ft | 4,115 | 1990 |
| M-46 over Sucker Creek | Fair | 69.9 ft | 3,520 | 1967 |
| Bray Road over Cass River | Fair | 210.0 ft | 3,520 | 1965 |
| Deckerville Road over Cass River | Fair | 180.1 ft | 2,920 | 1966 |
| Deckerville Road over White Creek I/c Drain | Fair | 27.9 ft | 2,900 | 1930 |
| Ormes Road over Perry Creek | Fair | 80.1 ft | 2,800 | 1982 |
| Millington Road over Perry Creek | Fair | 60.0 ft | 2,715 | 1980 |
| Deckerville Road over Mud Creek Drain Outlet | Fair | 60.0 ft | 2,550 | 1980 |
| M-81 over N Branch Cass River | Fair | 74.8 ft | 2,500 | 1977 |
| Deckerville Road over Butternut Creek Drain | Fair | 24.9 ft | 2,095 | 1971 |
| Fostoria Road over Fostoria I/c Drain | Fair | 40.0 ft | 2,080 | 1987 |
| Bradleyville Road over Northwest Drain | Fair | 24.9 ft | 2,000 | 1972 |
| Bevens Road over Butternut Creek Drain | Fair | 24.0 ft | 1,970 | 1971 |
| Belsay Road over Frost I/c Drain | Fair | 20.3 ft | 1,950 | 1984 |
| Deckerville Road over South Br White Creek | Fair | 60.0 ft | 1,920 | 1993 |
| Gilford Road over Northwest Drain | Fair | 25.9 ft | 1,865 | 1972 |
| M-24 over Wiscoggin Creek | Fair | 33.8 ft | 1,825 | 1983 |
| M-24 over Bach Creek | Fair | 34.8 ft | 1,825 | 1983 |
| M-24 over Wiscoggin Creek | Fair | 59.7 ft | 1,825 | 1983 |
| M-138 over Allen Drain | Fair | 40.0 ft | 1,678 | 1968 |
| Fairgrove Road over Allen Extension Drain | Fair | 25.9 ft | 1,650 | 1971 |
| Bradleyville Road over Northwest Drain Outlet 1 | Fair | 37.1 ft | 1,610 | 1972 |
| Caine Road over Cass River | Fair | 210.0 ft | 1,600 | 1982 |
| Vassar Road over Millington Creek | Fair | 26.9 ft | 1,565 | 1930 |
| Brown Road over Donigan Drain | Fair | 23.0 ft | 1,520 | 1963 |
| Hurds Corner Road over Sucker Creek Drain | Fair | 23.0 ft | 1,375 | 1960 |
| Millington Road over Evergreen Creek | Fair | 56.1 ft | 1,315 | 1992 |
| M-138 over No Name Drain | Fair | 40.0 ft | 1,305 | 1968 |
| M-138 over Northwest Drain | Fair | 40.0 ft | 1,305 | 1969 |
| Bevens Road over Clark Drain Extension | Fair | 60.0 ft | 1,245 | 1984 |
| Bradleyville Road over Northwest Drain Outlet 2 | Fair | 27.9 ft | 1,240 | 1972 |
| Vassar Road over Perry Creek | Fair | 45.9 ft | 1,220 | 1980 |
| M-138 over Northwest Drain | Fair | 40.0 ft | 1,201 | 1969 |
| Bay City-forestvil over State I/c Drain | Fair | 40.0 ft | 1,198 | 1984 |
| Dickerson Road over State & Colling I/c Drn | Fair | 44.0 ft | 1,125 | 1984 |
| Dutcher Road over Northwest Drain Outlet 1 | Fair | 42.0 ft | 980 | 1970 |
| Cottrell Road over Saginaw Valley Rr | Fair | 129.9 ft | 965 | 2001 |
| Barnes Road (west) over Perry Creek | Fair | 41.0 ft | 945 | 1978 |
| Barnes Road (mid) over Perry Creek | Fair | 27.9 ft | 945 | 1963 |
| Barnes Road (east) over Perry Creek | Fair | 27.9 ft | 945 | 1965 |
| Dickerson Road over Wiscoggin Drain | Fair | 58.1 ft | 934 | 1988 |
| Forest Road over Wiscoggin Drain | Fair | 56.4 ft | 908 | 1959 |
| Dickerson Road over Southgate Drain | Fair | 25.9 ft | 900 | 1984 |
| White Creek Road over White Creek Drain #2 | Fair | 27.9 ft | 800 | 1980 |
| Akron Road over Southgate Drain | Fair | 24.0 ft | 700 | 1971 |
| Dodge Road over Cass River | Fair | 194.9 ft | 655 | 1978 |
| Luder Road over Tuscola & Saginaw Bay Rr | Fair | 84.0 ft | 649 | 1984 |
| Higgins Road over Br 1 Northwest Drain | Fair | 24.0 ft | 600 | 1971 |
| Loomis Road over Walker-hayes Drain | Fair | 29.9 ft | 550 | 1958 |
| Hurds Corner Road over Butternut Creek Drain | Fair | 24.9 ft | 544 | 1971 |
| Hurds Corner Road over Cass River | Fair | 173.9 ft | 544 | 1978 |
| Hurds Corner Road over White Creek | Fair | 121.1 ft | 544 | 1978 |
| Snover Road over Beach Drain | Fair | 25.6 ft | 540 | 1935 |
| Vassar Road over Northwest Drain | Fair | 45.9 ft | 530 | 1971 |
| Englehart Road over White Creek I/c Drain | Fair | 35.1 ft | 525 | 1962 |
| Riley Road over Sucker Creek | Fair | 38.1 ft | 520 | 1973 |
| Akron Road over Northwest Drain Outlet 3 | Fair | 39.0 ft | 500 | 1962 |
| Koepfgen Road over Center B Drain | Fair | 30.2 ft | 440 | 1979 |
| Akron Road over Wiscoggin Drain | Fair | 29.9 ft | 430 | 1971 |
| Hurds Corner Road over Brkfld Ext-columbia-bkfd | Fair | 24.9 ft | 430 | 1968 |
| Dodge Road over White Creek I/c Drain | Fair | 61.4 ft | 420 | 1978 |
| Bay Park Road over Walker-hayes Drain | Fair | 24.0 ft | 412 | 1972 |
| Bay Park Road over Akron Centerline Drain | Fair | 20.0 ft | 412 | 1972 |
| Ringle Road over Allen Extension Drain | Fair | 49.5 ft | 410 | 1994 |
| Quanicassee Road over Northwest Drain Outlet 2 | Fair | 38.1 ft | 405 | 1994 |
| Ringle Road over Allen Extn Drain | Fair | 30.8 ft | 390 | 1964 |
| Ringle Road over Allen Extn Drain | Fair | 30.2 ft | 390 | 1965 |
| Blackmore Road over Evergreen Creek | Fair | 27.9 ft | 380 | 1982 |
| Dutcher Road over Vccm&s Drain | Fair | 25.9 ft | 370 | 1980 |
| Shabbona Road over White Creek I/c Drain | Fair | 35.1 ft | 350 | 1968 |
| Ringle Road over Allen Extn Drain | Fair | 21.7 ft | 345 | 1979 |
| Boy Scout Road over Sucker Creek | Fair | 51.5 ft | 335 | 1935 |
| Merry Road over Allen Extn Drain | Fair | 21.7 ft | 330 | 1979 |
| Buell Road over Millington Creek | Fair | 24.0 ft | 330 | 1930 |
| Murray Road over White Creek | Fair | 112.5 ft | 320 | 1979 |
| Gotham Road over Wiscoggin Drain | Fair | 56.1 ft | 300 | 1971 |
| Thomas Road over Sellars Drain | Fair | 35.1 ft | 300 | 1960 |
| Kirk Road over Br #1 Northwest Drain | Fair | 34.1 ft | 295 | 1972 |
| Vassar Road over Southgate Drain Outlet | Fair | 33.5 ft | 290 | 1990 |
| Hoppe Road over State & Colling I/c Drn | Fair | 35.8 ft | 260 | 1972 |
| French Road over Bach Drain | Fair | 25.3 ft | 250 | 1981 |
| Swaffer Road over Colts Creek | Fair | 24.0 ft | 250 | 1979 |
| Division Street over Huron & Eastern Rr | Fair | 99.7 ft | 250 | 1934 |
| Bradford Road over Northwest Drain Outlet 1 | Fair | 34.1 ft | 240 | 1972 |
| Elmwood Road over Southgate Drain | Fair | 30.8 ft | 225 | 1967 |
| Slack Road over Br. #1 Northwest Drain | Fair | 30.8 ft | 200 | 1965 |
| Loren Road over Millington Creek | Fair | 23.6 ft | 190 | 1979 |
| Hoppe Road over Columbian Drain | Fair | 23.0 ft | 185 | 1967 |
| Garner Road over Northwest Drain | Fair | 34.1 ft | 180 | 1972 |
| Darbee Road over Vccm&s Drain | Fair | 30.8 ft | 174 | 1962 |
| Plain Road over Butternut Creek Drain | Fair | 26.2 ft | 170 | 1977 |
| Swaffer Road over Perry Creek | Fair | 26.9 ft | 170 | 1974 |
| Gilford Road over Butternut Creek Drain | Fair | 27.9 ft | 165 | 1979 |
| Gilford Road over South Br White Creek | Fair | 42.0 ft | 165 | 1979 |
| Bradford Road over Northwest Drain Outlet 2 | Fair | 32.8 ft | 165 | 1963 |
| Hunt Road over S. O. Drain | Fair | 48.6 ft | 160 | 1989 |
| Plain Road over Sucker Creek Drain | Fair | 27.2 ft | 160 | 1963 |
| Rossman Road over Sucker Creek Drain | Fair | 31.5 ft | 140 | 1965 |
| Ringle Road over Sellars Drain | Fair | 26.9 ft | 138 | 1960 |
| Mayville Road over Murdick-vansickland Drn | Fair | 21.0 ft | 135 | 1958 |
| Quanicassee Road over Northwest Drain Outlet 1 | Fair | 34.8 ft | 125 | 1980 |
| Genesee Road over Frost I/c Drain | Fair | 21.7 ft | 120 | 1984 |
| Garner Road over Northwest Drain Outlet 2 | Fair | 27.9 ft | 110 | 1962 |
| Rossman Road over White Creek Drain #2 | Fair | 53.1 ft | 110 | 1983 |
| Deckerville Road over Northwest Drain | Fair | 52.5 ft | 105 | 1983 |
| Dutcher Road over Northwest Drain | Fair | 38.1 ft | 105 | 1963 |
| Murray Road over Sucker Creek Drain | Fair | 29.9 ft | 105 | 1965 |
| Elmwood Road over State & Colling I/c Drn | Fair | 37.1 ft | 100 | 2001 |
| Lamton Road over White Creek I/c Drain | Fair | 56.1 ft | 100 | 2004 |
| Murphy Lake Road over Perry Creek | Fair | 27.9 ft | 90 | 1974 |
| Belsay Road over Perry Creek | Fair | 27.9 ft | 90 | 1974 |
| Clothier Road over White Creek Drain #2 | Fair | 51.5 ft | 90 | 1987 |
| Harmon Lake Road over S. O. Drain | Fair | 22.0 ft | 85 | 1997 |
| Van Giesen Road over Hobart Or Br 3 NW Drain | Fair | 25.9 ft | 85 | 1979 |
| Bond Road over South Br White Creek | Fair | 40.4 ft | 85 | 1968 |
| Sergent Road over Dead Creek | Fair | 23.0 ft | 80 | 1979 |
| Buell Road over Perry Creek | Fair | 33.1 ft | 80 | 1967 |
| Hickey Road over Northwest Drain | Fair | 34.1 ft | 80 | 1972 |
| Van Buren Road over Vccm&s Drain | Fair | 32.2 ft | 80 | 2007 |
| Akron Road over Northwest Drain Outlet 1 | Fair | 50.9 ft | 80 | 1924 |
| Keil Road over Bach Drain | Fair | 20.0 ft | 78 | 1981 |
| Don Road over Gibson Drain | Fair | 27.9 ft | 76 | 1965 |
| Ashmore Road over State I/c Drain Extn | Fair | 56.1 ft | 75 | 1972 |
| Carson Road over Northwest Drain Outlet 3 | Fair | 37.1 ft | 75 | 1967 |
| Mc Arthur Road over White Creek I/c Drain | Fair | 61.0 ft | 70 | 2001 |
| Squires Road over Frost I/c Drain | Fair | 21.0 ft | 70 | 1982 |
| Austin Road over Belgian Drain | Fair | 35.1 ft | 65 | 1962 |
| Darbee Road over Wiscoggin Drain | Fair | 28.9 ft | 60 | 1979 |
| Cooklin Road over Butternut Creek Drain | Fair | 29.5 ft | 60 | 1978 |
| Maier Road over Fremont Drain | Fair | 24.0 ft | 60 | 1960 |
| Harris Road over Murdick-vansickland Drn | Fair | 40.0 ft | 60 | 1991 |
| Lanway Road over Murdick-vansickland Drn | Fair | 21.7 ft | 55 | 2008 |
| Parrent Road over Gibson Drain | Fair | 21.7 ft | 43 | 1979 |
| Kindler Road over Wiscoggin Drain | Fair | 69.9 ft | 35 | 2003 |
| Ackerman Road over State I/c Drain Extn | Fair | 42.0 ft | 30 | 1972 |
| Arthur Road over South Br White Creek | Fair | 51.8 ft | 20 | 1998 |
| Allen Road over Allen Drain | Fair | 45.9 ft | 15 | 1980 |
| Ross Road over S. O. Drain | Fair | 35.8 ft | 8 | 1978 |
| Drv Off Garner RD over NW Outlet No. 3 | Fair | 68.2 ft | 5 | 1980 |
| M-15 over Cass River | Good | 310.4 ft | 14,550 | 2015 |
| M-81 over Marsh Drain | Good | 25.6 ft | 6,273 | 2007 |
| M-25 over Quanicassee River | Good | 240.2 ft | 5,571 | 2013 |
| M-24 over Kreger Drain | Good | 20.7 ft | 4,188 | 1941 |
| M-46 over Sucker Creek | Good | 53.5 ft | 4,040 | 2012 |
| Chambers Road over Cass River | Good | 201.1 ft | 3,900 | 2009 |
| Birch Run Road over Thetford-arbela I/c Drn | Good | 34.1 ft | 3,540 | 1978 |
| Cemetery Road over Cass River | Good | 173.9 ft | 2,948 | 2015 |
| M-15 over Sheboygan Drain | Good | 29.9 ft | 2,842 | 2009 |
| Cemetery Road over White Creek I/c Drain | Good | 42.0 ft | 2,370 | 1986 |
| Van Buren Road over Sheboygan 1/c Drain | Good | 32.2 ft | 2,348 | 2020 |
| Ormes Road over Millington Creek | Good | 22.6 ft | 2,230 | 2017 |
| Bevens Road over Sucker Creek | Good | 67.3 ft | 1,880 | 1992 |
| Bay City-forestvil over Wiscoggin Drain | Good | 71.9 ft | 1,854 | 2018 |
| M-24 over Gilbert Br Wiscoggin Drn | Good | 24.6 ft | 1,825 | 1984 |
| Vassar Road over Perry Creek | Good | 49.9 ft | 1,690 | 1985 |
| Vassar Road over Gooding Creek | Good | 40.0 ft | 1,440 | 1987 |
| Fostoria Road over Br Evergreen Creek | Good | 36.1 ft | 1,420 | 1991 |
| Kingston Road over Clark Drain Extension | Good | 67.9 ft | 1,390 | 1986 |
| Dickerson Road over Allen Drain | Good | 29.9 ft | 1,300 | 1971 |
| Dickerson Road over Latimer Or Allen Relief | Good | 24.9 ft | 1,300 | 2009 |
| Gilford Road over Hobart Or Br 3 NW Drain | Good | 24.9 ft | 1,237 | 1971 |
| Vassar Road over Hobart Or Br 3 NW Drain | Good | 26.9 ft | 1,000 | 1971 |
| Caine Road over Gooding Creek | Good | 45.9 ft | 905 | 2017 |
| Hanes Road over Donigan Drain | Good | 28.2 ft | 755 | 1979 |
| Phillips Road over White Creek I/c Drain | Good | 44.9 ft | 680 | 1973 |
| Vassar Road over Northwest Drain | Good | 34.1 ft | 650 | 1971 |
| White Creek Road over White Creek Drain #2 | Good | 47.9 ft | 600 | 1993 |
| Frankford Road over Sucker Creek | Good | 66.9 ft | 540 | 2016 |
| Shays Lake Road over Sucker Creek Drain | Good | 25.9 ft | 480 | 2018 |
| Van Buren Road over Br 1 Squaw Ck-gilford Dn | Good | 22.3 ft | 450 | 1980 |
| Bay Park Road over Southgate Drain Outlet 2 | Good | 28.9 ft | 412 | 1990 |
| Bay Park Road over Allen Drain | Good | 56.1 ft | 412 | 1972 |
| Akron Road over State & Collins I/c Drn | Good | 25.9 ft | 350 | 1970 |
| Elmwood Road over Northwest Drain Outlet 3 | Good | 49.9 ft | 350 | 2000 |
| Ringle Road over Allen Extn Drain | Good | 21.7 ft | 345 | 1979 |
| Millington Road over Dead Creek | Good | 26.2 ft | 342 | 2017 |
| Shabbona Road over White Creek I/c Drain | Good | 55.4 ft | 335 | 1972 |
| Hanes Road over Gooding Creek | Good | 27.6 ft | 335 | 1979 |
| Elmwood Road over Center B Drain | Good | 29.5 ft | 310 | 1979 |
| Loren Road over Perry Creek | Good | 45.6 ft | 300 | 2006 |
| Lee Hill Road over Sucker Creek Drain | Good | 44.0 ft | 285 | 2021 |
| Old State Road over Quanicassee River Cut | Good | 120.1 ft | 239 | 2016 |
| Ringle Road over Wiscoggin Drain | Good | 65.9 ft | 225 | 1996 |
| Elmwood Road over Allen Drain | Good | 24.0 ft | 225 | 1992 |
| Shreeves Road over Allen Extn Drain | Good | 24.9 ft | 220 | 1967 |
| Elmwood Road over North Br Cass River | Good | 149.9 ft | 215 | 2003 |
| Thomas Road over Wiscoggin Drain | Good | 47.9 ft | 205 | 1984 |
| Elmwood Road over Wiscoggin Drain | Good | 48.9 ft | 202 | 2013 |
| Albin Road over Sucker Creek | Good | 50.5 ft | 185 | 1990 |
| Thomas Road over Allen Ext Drain | Good | 48.9 ft | 175 | 2014 |
| Old State Road over Northwest Drain Outlet 1 | Good | 59.1 ft | 170 | 2010 |
| Loomis Road over Tuttleville Drain | Good | 20.0 ft | 133 | 1980 |
| Loomis Road over Akron Centerline Drain | Good | 30.2 ft | 132 | 1993 |
| Crawford Road over White Creek I/c Drain | Good | 56.1 ft | 130 | 1994 |
| Cass City Road over State & Colling I/c Drn | Good | 35.4 ft | 126 | 1992 |
| Waterman Road over Evergreen Creek | Good | 33.1 ft | 120 | 1992 |
| Rossman Road over S. O. Drain | Good | 36.1 ft | 120 | 1978 |
| Legg Road over White Creek Drain #2 | Good | 38.1 ft | 116 | 2015 |
| Loomis Road over Allen Drain | Good | 60.0 ft | 115 | 1999 |
| Hoppe Road over Wiscoggin Dairn | Good | 47.9 ft | 115 | 1986 |
| Cemetery Road over White Creek Drain #2 | Good | 53.5 ft | 105 | 1996 |
| Goodrich Road over Fostoria Drain | Good | 36.1 ft | 105 | 1994 |
| Cass City Road over Northwest Drain Outlet 3 | Good | 75.8 ft | 100 | 1986 |
| Garner Road over Northwest Drain Outlet 1 | Good | 63.0 ft | 98 | 1999 |
| Van Geisen Road over Northwest Drain | Good | 51.8 ft | 90 | 1998 |
| Centerline Road over Murdick-vansickland Drn | Good | 36.1 ft | 90 | 1993 |
| Cass City Road over Wiscoggin Drain | Good | 36.1 ft | 78 | 1984 |
| Cass City Road over Allen Drain #1 | Good | 27.9 ft | 75 | 2010 |
| Cass City Road over Latimer Or Allen Relief | Good | 22.0 ft | 72 | 2016 |
| Dutcher Road over Wiscoggin Drain | Good | 36.1 ft | 70 | 1979 |
| Turner Road over Sucker Creek Drain | Good | 22.0 ft | 70 | 2003 |
| Reed Road over North Br Cass River | Good | 87.9 ft | 60 | 2009 |
| Harmon Lake Road over Sucker Creek Drain | Good | 27.9 ft | 50 | 1983 |
| Washburn Road over Scott Drain | Good | 30.2 ft | 50 | 1979 |
| Phillips Road over South Br White Creek | Good | 50.2 ft | 50 | 1968 |
| Wells Road over S. O. Drain | Good | 36.1 ft | 50 | 1986 |
| Carson Road over Southgate Drain | Good | 24.3 ft | 50 | 1998 |
| Remington Road over Columbia Drain | Good | 35.1 ft | 50 | 2015 |
| Mushroom Road over South Br White Creek | Good | 42.0 ft | 40 | 1978 |
| Allen Road over Southgate Drain | Good | 24.3 ft | 27 | 1998 |
| Pike Road over Center Line Drain | Good | 22.0 ft | 24 | 2020 |