| Racine AVE over Drainage Ditch | Poor | 24.9 ft | 2,671 | 1953 |
| Racine AVE over Small Natural Stream | Poor | 91.9 ft | 2,671 | 1954 |
| FM over Wapsipinicon River | Poor | 351.0 ft | 1,390 | 1962 |
| FM over Small Stream | Poor | 64.0 ft | 790 | 1952 |
| FM over Br Buffalo Creek | Poor | 24.9 ft | 776 | 1962 |
| 220th ST over Drainage Ditch | Poor | 25.9 ft | 760 | 1927 |
| 330th ST over Bear Creek | Poor | 154.9 ft | 648 | 1951 |
| Concord ST over Drainage | Poor | 53.1 ft | 220 | 1900 |
| Loc 150th ST over Otter CR | Poor | 203.1 ft | 130 | 1953 |
| Parrish AVE over Pine CR | Poor | 102.0 ft | 80 | 1960 |
| FM over Small Stream | Poor | 86.9 ft | 79 | 1957 |
| Local 260th ST over Lime CR | Poor | 47.9 ft | 41 | 1986 |
| Loc Taylor AVE over Buffalo CR | Poor | 39.0 ft | 35 | 1951 |
| Local 325th ST over Mud CR | Poor | 101.0 ft | 30 | 1953 |
| Pine Creek AVE over Small Stream | Poor | 49.9 ft | 30 | 2012 |
| Local over Small Stream | Poor | 55.1 ft | 30 | 1951 |
| Freeman AVE over Small Stream | Poor | 33.1 ft | 21 | 1950 |
| Local 305th St. over Lime CR | Poor | 81.0 ft | 16 | 1910 |
| Local over Small Stream | Poor | 78.1 ft | 15 | 1951 |
| Loc Finley AVE over Lime CR | Poor | 94.2 ft | 11 | 1925 |
| 1st ST W over Wapsipinicon River | Fair | 255.9 ft | 10,258 | 1917 |
| US 20 over Drainage Ditch | Fair | 25.9 ft | 10,100 | 1980 |
| Ia 150 over Wapsipinicon River | Fair | 340.9 ft | 9,000 | 1927 |
| NB I-380 over Lime Creek | Fair | 198.2 ft | 8,850 | 1984 |
| SB I-380 over Lime Creek | Fair | 198.2 ft | 8,850 | 1984 |
| US 20 over Dry Creek | Fair | 21.0 ft | 8,300 | 1979 |
| Ia 150 over Branch Bear Creek | Fair | 33.1 ft | 4,530 | 1983 |
| Ia 150 over Branch Bear Creek | Fair | 33.1 ft | 4,530 | 1976 |
| SR W-40 over US 20 | Fair | 267.1 ft | 4,174 | 1978 |
| EB US 20 over Wapsipinicon River | Fair | 338.9 ft | 4,150 | 1978 |
| WB US 20 over Wapsipinicon River | Fair | 338.9 ft | 4,150 | 1978 |
| EB US 20 over Pine Creek | Fair | 243.1 ft | 4,150 | 1978 |
| Ia 150 over Harte Creek | Fair | 75.1 ft | 3,890 | 1984 |
| Ia 150 over Branch Otter Creek | Fair | 21.0 ft | 3,890 | 1984 |
| Ia 150 over Stream | Fair | 22.0 ft | 3,890 | 1984 |
| EB US 20 over Buffalo Creek | Fair | 305.1 ft | 3,500 | 1978 |
| WB US 20 over Buffalo Creek | Fair | 305.1 ft | 3,500 | 1978 |
| 220th ST over Drainage Ditch | Fair | 44.0 ft | 3,260 | 1974 |
| Jackson AVE over Small Stream | Fair | 22.0 ft | 3,103 | 1976 |
| WB US 20 over Ia 150 | Fair | 211.0 ft | 3,100 | 1978 |
| 2nd ST SW over Wapsipinicon River | Fair | 253.0 ft | 2,834 | 1968 |
| Racine AVE over Drainage Ditch | Fair | 26.9 ft | 2,671 | 1953 |
| Ia 281 over Little Wapsipinicon Rvr | Fair | 142.1 ft | 2,670 | 1954 |
| 220th ST over Small Natural Stream | Fair | 20.0 ft | 2,494 | 1999 |
| Ia 281 over Otter Creek | Fair | 167.0 ft | 2,330 | 1986 |
| Ia 187 over Lamont Creek | Fair | 124.0 ft | 2,250 | 1977 |
| FM Denison AVE over Small Creek | Fair | 25.9 ft | 1,650 | 1998 |
| FM over Small Creek | Fair | 112.9 ft | 1,650 | 1998 |
| Ia 187 over Stream | Fair | 35.1 ft | 1,560 | 1960 |
| FM over Buck Creek | Fair | 142.1 ft | 1,493 | 1980 |
| FM over Buck Creek | Fair | 143.0 ft | 1,277 | 1972 |
| Ia 187 over US 20 | Fair | 262.1 ft | 1,170 | 1970 |
| FM over Harter CR | Fair | 75.1 ft | 1,169 | 1963 |
| 3rd ST NE over Melone Creek | Fair | 100.1 ft | 1,149 | 1969 |
| FM over Little Spring Creek | Fair | 75.1 ft | 1,090 | 1987 |
| 330th ST over Lime Creek | Fair | 91.9 ft | 992 | 1951 |
| FM over Stream | Fair | 22.0 ft | 982 | 1968 |
| FM over Small Stream | Fair | 25.9 ft | 982 | 1968 |
| FM over Stream | Fair | 45.9 ft | 982 | 1965 |
| FM over Harter Creek | Fair | 77.1 ft | 825 | 1964 |
| FM over Otter Creek | Fair | 157.2 ft | 805 | 2001 |
| FM over Pine Creek | Fair | 125.0 ft | 776 | 1991 |
| W 35 over US 20 | Fair | 299.9 ft | 776 | 1978 |
| FM W45 over Dry Creek | Fair | 103.0 ft | 730 | 1974 |
| FM over Wapsipinicon River | Fair | 253.9 ft | 687 | 1968 |
| FM over Ovflw Wapsipinicon Rvr | Fair | 102.0 ft | 687 | 1968 |
| FM over Stream | Fair | 25.9 ft | 658 | 1972 |
| FM over Small Stream | Fair | 33.1 ft | 599 | 1970 |
| FM over Small Stream | Fair | 33.1 ft | 599 | 1970 |
| Washington ST over Drainage | Fair | 77.1 ft | 509 | 1959 |
| FM W-45 over US 20 | Fair | 380.9 ft | 471 | 1978 |
| FM over Small Stream | Fair | 29.9 ft | 422 | 1965 |
| FM over W Br Pine Creek | Fair | 103.0 ft | 344 | 1977 |
| FM over W Br Buffalo Creek | Fair | 116.1 ft | 344 | 1974 |
| FM over W Br Buffalo Creek | Fair | 128.0 ft | 334 | 1974 |
| FM over Smith Creek | Fair | 40.0 ft | 324 | 2003 |
| FM Laporte RD over Mud Creek | Fair | 102.0 ft | 320 | 1967 |
| Local over Otter Creek | Fair | 128.9 ft | 295 | 1997 |
| FM over Malone Creek | Fair | 127.0 ft | 285 | 1969 |
| FM 280th St. over Spring Creek | Fair | 75.1 ft | 246 | 1952 |
| Jackson St. over Stream | Fair | 80.1 ft | 232 | 1984 |
| 2nd ST NE over Melone Creek | Fair | 103.0 ft | 208 | 1985 |
| Local Dugan AVE over Lime CR | Fair | 127.0 ft | 200 | 1952 |
| Local 265th ST over Bear CR | Fair | 77.1 ft | 190 | 1962 |
| FM over Small Stream | Fair | 32.2 ft | 167 | 1966 |
| FM over Buffalo Creek | Fair | 149.9 ft | 167 | 1955 |
| Loc Keokuk AVE over Small Stream | Fair | 23.0 ft | 154 | 1976 |
| FM over Stream | Fair | 24.9 ft | 147 | 1951 |
| FM 140th ST over Small Stream | Fair | 58.1 ft | 147 | 1958 |
| FM Vincent Av over Small Stream | Fair | 25.9 ft | 137 | 1955 |
| FM 145th ST over Little Wapsipinicon | Fair | 202.1 ft | 137 | 1965 |
| Loc 100th ST over Stream | Fair | 24.0 ft | 128 | 1995 |
| Local RD over Buffalo Creek | Fair | 80.1 ft | 123 | 1980 |
| Pine Creek AVE over Small Stream | Fair | 77.1 ft | 120 | 1957 |
| FM Stewart Av over Small Stream | Fair | 30.8 ft | 118 | 1963 |
| FM Stewart Av over Small Stream | Fair | 32.2 ft | 118 | 1963 |
| FM over W Br Buffalo Creek | Fair | 130.9 ft | 118 | 1957 |
| FM 140th ST over Otter Creek | Fair | 127.0 ft | 118 | 1968 |
| FM Stewart Av over Small Creek | Fair | 77.1 ft | 110 | 1963 |
| FM 310th ST over Dry Creek | Fair | 87.9 ft | 110 | 1956 |
| FM 140th ST over Hunter Creek | Fair | 78.1 ft | 108 | 1968 |
| 165th ST over Small Creek | Fair | 21.0 ft | 104 | 1900 |
| FM 250th ST over Small Stream | Fair | 32.2 ft | 100 | 1957 |
| FM 150th ST over Buffalo Creek | Fair | 153.9 ft | 98 | 1985 |
| FM Quonset AVE over W Br Buffalo Ck | Fair | 125.0 ft | 98 | 1979 |
| Loc Central AVE over Small Stream | Fair | 77.1 ft | 91 | 1967 |
| Local 250th ST over Small Creek | Fair | 77.1 ft | 90 | 1957 |
| FM over Buffalo Creek | Fair | 169.0 ft | 88 | 1962 |
| FM over Malone Creek | Fair | 56.1 ft | 88 | 2003 |
| FM over Buck Creek | Fair | 143.0 ft | 88 | 1965 |
| Local 240th ST over Small Stream | Fair | 23.0 ft | 82 | 1979 |
| Local 335th St. over Small Stream | Fair | 28.9 ft | 80 | 1998 |
| FM over Lime Creek | Fair | 151.9 ft | 80 | 1954 |
| Local 250th ST over Pine CR | Fair | 82.0 ft | 80 | 2004 |
| FM 140th ST over Small Stream | Fair | 32.2 ft | 80 | 1958 |
| Loc 100th ST over W Branch Buffalo Ck | Fair | 55.1 ft | 79 | 1979 |
| Danial AVE over Mud CR | Fair | 45.9 ft | 73 | 1989 |
| Local over Small Stream | Fair | 78.1 ft | 73 | 1969 |
| Loc Harrison Av over Small Stream | Fair | 78.1 ft | 73 | 1959 |
| Loc 110th ST over Small Stream | Fair | 32.2 ft | 73 | 1963 |
| Loc 110th ST over Hunter CR | Fair | 76.1 ft | 73 | 1963 |
| FM 250th ST over Buffalo Creek | Fair | 47.9 ft | 70 | 1994 |
| Local 240th ST over Buffalo Creek | Fair | 243.1 ft | 70 | 1986 |
| York AVE over US 20 | Fair | 257.9 ft | 69 | 1970 |
| Postel AVE over Small Stream | Fair | 67.9 ft | 69 | 2011 |
| 330th ST over Dry Creek | Fair | 67.9 ft | 62 | 2007 |
| Local King AVE over Small Stream | Fair | 22.0 ft | 62 | 1970 |
| Carter AVE over Small Stream | Fair | 22.0 ft | 62 | 1952 |
| Local over West Branch Of Pine Crk | Fair | 125.0 ft | 62 | 1988 |
| Indiana AVE over Otter CR | Fair | 66.9 ft | 62 | 2010 |
| Quinset AVE over Sand Creek | Fair | 125.0 ft | 60 | 1958 |
| Local 310th St. over Small Creek | Fair | 77.1 ft | 60 | 1963 |
| Local 310th ST over Lime CR | Fair | 102.0 ft | 60 | 1957 |
| Local 260th ST over Buffalo Creek | Fair | 210.0 ft | 60 | 1949 |
| Local 230th ST over Pine CR | Fair | 65.0 ft | 59 | 2007 |
| FM over Small Stream | Fair | 22.0 ft | 59 | 1970 |
| FM 155th ST over Pine Creek | Fair | 102.0 ft | 59 | 1969 |
| 280th ST over Buffalo Creek | Fair | 81.0 ft | 51 | 2004 |
| Local over Buffalo Creek | Fair | 125.0 ft | 51 | 1998 |
| Local over Little Wapsipinicon Rvr | Fair | 243.1 ft | 51 | 1966 |
| 310th Street over Stream | Fair | 24.9 ft | 51 | 2005 |
| Keokuk AVE over Malone CR | Fair | 32.2 ft | 49 | 2004 |
| Local 170th St. over Pine Creek | Fair | 88.9 ft | 47 | 2009 |
| 142nd ST over W Branch Buffalo CR | Fair | 86.0 ft | 47 | 2011 |
| Loc 110th ST over Otter CR | Fair | 174.9 ft | 47 | 1963 |
| Loc 100th ST over Stream | Fair | 56.1 ft | 44 | 1940 |
| FM over Drainage Ditch | Fair | 26.9 ft | 44 | 1955 |
| Local 330th ST over Walton Creek | Fair | 68.9 ft | 41 | 2006 |
| FM Lawrence AVE over Small Stream | Fair | 58.1 ft | 41 | 1953 |
| 250th ST over Unnamed Creek | Fair | 21.0 ft | 41 | 2010 |
| FM Stewart Av over Smith Creek | Fair | 32.2 ft | 40 | 1958 |
| Loc 100th ST over Buffalo CR | Fair | 57.1 ft | 40 | 1940 |
| Loc Kentucky Av over Small Stream | Fair | 56.1 ft | 40 | 2002 |
| Local Frost AVE over Small Stream | Fair | 23.0 ft | 39 | 1976 |
| Local over Small Stream | Fair | 67.9 ft | 39 | 2005 |
| Iowa AVE over Small Stream | Fair | 87.9 ft | 35 | 1957 |
| Localiowa AVE over Bear CR | Fair | 102.0 ft | 35 | 1953 |
| Local over Small Stream | Fair | 33.1 ft | 35 | 1940 |
| Local 240th ST over Lime CR | Fair | 49.9 ft | 34 | 1967 |
| FM over Small Stream | Fair | 26.9 ft | 34 | 1960 |
| FM over Pine Creek | Fair | 127.0 ft | 34 | 1960 |
| 175th AVE over Small Stream | Fair | 30.8 ft | 33 | 1995 |
| Local over Buffalo Creek | Fair | 88.9 ft | 30 | 2005 |
| Nolan AVE over Small Stream | Fair | 32.2 ft | 30 | 1963 |
| Nolan AVE over Sand Creek | Fair | 67.9 ft | 30 | 2012 |
| 320th ST over Drainage | Fair | 67.9 ft | 30 | 2005 |
| 270th ST over Lime Creek | Fair | 69.6 ft | 30 | 2015 |
| Local over Prairie CR | Fair | 44.0 ft | 30 | 1953 |
| Loc Union AVE over Small Stream | Fair | 44.0 ft | 30 | 1955 |
| Local 275th ST over Smith CR | Fair | 56.1 ft | 25 | 2002 |
| 112th ST over Buck Creek | Fair | 125.0 ft | 25 | 2001 |
| Vincent AVE over Dry Creek | Fair | 46.9 ft | 20 | 1940 |
| Local 265th ST over Spring Creek | Fair | 77.1 ft | 20 | 1959 |
| Local 180th St. over Prairie Creek | Fair | 45.9 ft | 20 | 1997 |
| Local over Prairie CR | Fair | 44.0 ft | 16 | 1953 |
| Local 240th ST over Pine CR | Fair | 77.1 ft | 15 | 1961 |
| Local 255th ST over Small Stream | Fair | 22.0 ft | 11 | 2006 |
| Danial AVE over Spring CR | Fair | 63.0 ft | 11 | 1956 |
| Dead End 115 ST over Small Stream | Fair | 24.9 ft | 11 | 1968 |
| Vincent AVE over Dry Creek | Fair | 102.0 ft | 10 | 1960 |
| Local 290th ST over Dry Creek | Fair | 56.1 ft | 5 | 2003 |
| I-380 over Mud Creek | Good | 34.1 ft | 17,700 | 1983 |
| US 20 over Drainage Ditch | Good | 24.9 ft | 10,700 | 1980 |
| US 20 over Drainage Ditch | Good | 21.0 ft | 10,100 | 1980 |
| NB I-380 over Bear Creek | Good | 171.9 ft | 8,950 | 1984 |
| SB I-380 over Bear Creek | Good | 171.9 ft | 8,950 | 1984 |
| NB I-380 over SR D48 | Good | 205.1 ft | 8,550 | 1984 |
| I 380 SB over D48 | Good | 205.1 ft | 8,550 | 1984 |
| 1st ST East over Melone Creek | Good | 133.5 ft | 6,094 | 2019 |
| Ia 150 over Hazelton Creek | Good | 132.9 ft | 5,100 | 1986 |
| Ia 150 over Bear Creek | Good | 196.9 ft | 4,650 | 2013 |
| Ia 150 over Bear Creek | Good | 123.0 ft | 4,650 | 2009 |
| WB US 20 over Pine Creek | Good | 246.1 ft | 4,150 | 1978 |
| Ia 150 over Branch Otter Creek | Good | 33.1 ft | 3,890 | 1984 |
| Ia 150 over Otter Creek | Good | 21.0 ft | 3,890 | 1991 |
| EB US 20 over Ia 150 | Good | 211.0 ft | 3,100 | 1978 |
| V65 over Small Stream | Good | 65.9 ft | 2,917 | 2014 |
| Ia 281 over Hunter Creek | Good | 78.1 ft | 2,330 | 1986 |
| Ia 187 over So Fk Maquoketa River | Good | 171.9 ft | 2,250 | 1989 |
| FM V-65 over US 20 | Good | 268.0 ft | 2,062 | 1980 |
| Ia 187 over Prairie Creek | Good | 131.9 ft | 1,960 | 1989 |
| FM over Little Wapsipinicon | Good | 243.1 ft | 1,650 | 1996 |
| D22 (220th St) over Pine Creek | Good | 176.2 ft | 1,420 | 2013 |
| D22 (220th St) over Drainage Ditch | Good | 20.7 ft | 1,420 | 2013 |
| V62 Baxter AVE over Small Stream | Good | 73.2 ft | 1,365 | 2018 |
| Iowa AVE (mhi) over US 20 | Good | 268.0 ft | 1,218 | 1980 |
| W35 Quasqueton AVE over Small Creek | Good | 129.9 ft | 1,180 | 2019 |
| W35 Quasqueton AVE over Small Stream | Good | 92.8 ft | 1,180 | 2019 |
| Water ST over Wapsipinicon River | Good | 425.9 ft | 1,169 | 2013 |
| Hayes ST over Otter Creek | Good | 131.9 ft | 1,119 | 2015 |
| 120th ST over Hunter Creek | Good | 201.1 ft | 1,100 | 2000 |
| W45 Slater AVE over Buffalo Creek | Good | 213.9 ft | 982 | 2002 |
| FM V-65 over I-380 | Good | 308.1 ft | 864 | 1984 |
| D16 Otterville over Small Stream | Good | 73.2 ft | 805 | 2019 |
| Quasqueton BLVD over Small Stream | Good | 71.9 ft | 776 | 2014 |
| D22 200th ST over Buffalo Creek | Good | 200.1 ft | 760 | 2018 |
| FM V-71 over I 380 | Good | 299.9 ft | 520 | 1983 |
| V71 over US 20 | Good | 268.0 ft | 520 | 1980 |
| FM over Buffalo Creek | Good | 125.0 ft | 432 | 2004 |
| FM over W Br Buffalo CR | Good | 112.9 ft | 373 | 2003 |
| FM 290 St. over Bear Creek | Good | 155.8 ft | 350 | 2004 |
| FM 290th ST over Lime Creek | Good | 157.2 ft | 350 | 2004 |
| FM 155th St. over Small Stream | Good | 86.9 ft | 344 | 2004 |
| FM over W Br Buffalo Creek | Good | 112.9 ft | 334 | 2004 |
| FM over Wapsipinicon River | Good | 324.1 ft | 216 | 1999 |
| FM over Buffalo Creek | Good | 226.0 ft | 196 | 2003 |
| Henley AVE over US 20 | Good | 256.9 ft | 187 | 1980 |
| FM over Bear Creek | Good | 45.9 ft | 177 | 2006 |
| Carter AVE over Small Stream | Good | 21.0 ft | 135 | 2004 |
| Loc 150th ST over Hunter CR | Good | 111.9 ft | 135 | 2006 |
| Nolan AVE over Wapsipinicon River | Good | 324.1 ft | 130 | 1996 |
| Dillon AVE over Small Stream | Good | 55.1 ft | 113 | 2015 |
| Loc Grant AVE over Small Stream | Good | 25.9 ft | 104 | 1973 |
| Local Union AVE over Dry Creek | Good | 112.9 ft | 98 | 1997 |
| Local 250th ST over Small Stream | Good | 71.9 ft | 98 | 2010 |
| FM W-17 over I-380 | Good | 268.0 ft | 98 | 1984 |
| Loc Grant AVE over Small Stream | Good | 20.0 ft | 91 | 2005 |
| 235th ST over Small Stream | Good | 83.0 ft | 90 | 2016 |
| Washington AVE over S Fork Maquoketa River | Good | 125.0 ft | 88 | 2005 |
| Deacon AVE over Small Stream | Good | 52.2 ft | 82 | 2015 |
| Iowa AVE over Small Stream | Good | 27.9 ft | 79 | 2004 |
| Coots BLVD over Small Creek | Good | 26.2 ft | 79 | 2015 |
| 252nd ST over Bear Creek | Good | 26.9 ft | 73 | 2000 |
| Local over Small Stream | Good | 42.0 ft | 73 | 2005 |
| River RD BLVD over Small Stream | Good | 22.0 ft | 73 | 2000 |
| Ringold AVE over Drainage | Good | 22.0 ft | 73 | 2015 |
| Local 270th ST over Smith CR | Good | 67.9 ft | 70 | 2004 |
| York AVE over Small Stream | Good | 69.9 ft | 69 | 2017 |
| FM York AVE over Small Stream | Good | 21.0 ft | 69 | 2008 |
| FM 250th ST over Lime Creek | Good | 87.9 ft | 69 | 1989 |
| 170th ST over Small Stream | Good | 32.2 ft | 69 | 2023 |
| King AVE over Small Stream | Good | 24.0 ft | 62 | 2013 |
| 185th ST over Small Stream | Good | 29.9 ft | 62 | 2018 |
| Hamilton AVE over Bear CR | Good | 89.9 ft | 60 | 2006 |
| FM Gabrial Av over Lime Creek | Good | 155.8 ft | 60 | 1976 |
| 150th ST over Small Stream | Good | 67.9 ft | 60 | 2018 |
| Thomas AVE over Small Stream | Good | 67.9 ft | 59 | 2021 |
| FM Thomas AVE over Dry Creek | Good | 112.9 ft | 59 | 1989 |
| Thomas AVE over Small Stream | Good | 23.0 ft | 59 | 2014 |
| FM over Prarie Creek | Good | 100.1 ft | 59 | 2007 |
| FM over Small Stream | Good | 75.1 ft | 59 | 2007 |
| Overland AVE over Drainage | Good | 21.0 ft | 59 | 2015 |
| Scott BLVD over Small Stream | Good | 67.9 ft | 51 | 2014 |
| Local Scott over Smith CR | Good | 23.0 ft | 51 | 1989 |
| 228th ST over Small Stream | Good | 37.7 ft | 51 | 2012 |
| Local over Small Stream | Good | 67.9 ft | 51 | 2010 |
| Quonset AVE over Drainage | Good | 21.0 ft | 51 | 2015 |
| Scott BLVD over Small Stream | Good | 67.9 ft | 50 | 2022 |
| 130th ST over Small Stream | Good | 67.9 ft | 50 | 2016 |
| FM 115th ST over Small Stream | Good | 23.0 ft | 49 | 2005 |
| Local over S Fork Maquoketa River | Good | 125.0 ft | 49 | 1997 |
| 208th Street over Small Stream | Good | 27.9 ft | 47 | 1992 |
| Local over Small Stream | Good | 25.9 ft | 47 | 2006 |
| 310th ST over Small Stream | Good | 40.0 ft | 45 | 2019 |
| Lee Avenue over Small Stream | Good | 27.9 ft | 44 | 2000 |
| 170th ST over Prairie Creek | Good | 68.9 ft | 44 | 2014 |
| Loc 100th ST over Stream | Good | 27.9 ft | 44 | 1995 |
| FM over S Fk Maquoketa River | Good | 125.0 ft | 44 | 1990 |
| Victor AVE over Prairie Creek | Good | 52.2 ft | 42 | 2014 |
| 300th ST over Dry Creek | Good | 80.1 ft | 41 | 2014 |
| Victor AVE over S Fork Maquoketa River | Good | 69.9 ft | 41 | 2016 |
| Michel AVE over Small Stream | Good | 22.0 ft | 41 | 2023 |
| Kentucky AVE over Small Stream | Good | 52.2 ft | 40 | 2012 |
| FM 310th St. over Sand Creek | Good | 100.1 ft | 35 | 1995 |
| Loc 150th ST over Small Creek | Good | 45.9 ft | 34 | 2004 |
| FM over Stream | Good | 128.0 ft | 34 | 1999 |
| Local over Small Stream | Good | 87.9 ft | 33 | 1995 |
| Overland AVE over Small Stream | Good | 33.5 ft | 30 | 2020 |
| Butler AVE over Small Stream | Good | 42.0 ft | 30 | 2006 |
| 240th ST over Small Stream | Good | 25.9 ft | 29 | 2016 |
| Quonset AVE over Buffalo Creek | Good | 87.9 ft | 29 | 2000 |
| Loc 108th ST over Small Stream | Good | 30.8 ft | 29 | 1987 |
| 305th ST over Bear Creek | Good | 70.9 ft | 26 | 2017 |
| Local 320th St. over Small Stream | Good | 33.1 ft | 26 | 1999 |
| Local over Spring CR | Good | 67.9 ft | 26 | 2005 |
| 215th ST over Small Stream | Good | 52.5 ft | 26 | 2016 |
| 105th ST over Otter Creek | Good | 100.1 ft | 26 | 2000 |
| Michel AVE over Small Creek | Good | 37.1 ft | 25 | 2011 |
| Local 275th ST over Spring CR | Good | 89.9 ft | 25 | 2010 |
| 275th ST over Small Stream | Good | 22.0 ft | 25 | 2011 |
| 275th ST over Small Stream | Good | 20.0 ft | 25 | 2011 |
| Local Frost AVE over Small Stream | Good | 23.0 ft | 21 | 2003 |
| Local 190th ST over Malone CR | Good | 39.0 ft | 21 | 2004 |
| 195th ST over Malone Creek | Good | 67.9 ft | 21 | 2023 |
| Overland AVE over Sand Creek | Good | 86.9 ft | 20 | 1995 |
| 280th ST over Small Stream | Good | 53.1 ft | 20 | 2020 |
| Overland AVE over Small Stream | Good | 69.6 ft | 20 | 2020 |
| Loc Quinn AVE over Buffalo CR East Branch | Good | 140.1 ft | 16 | 2010 |
| Local 280th St. over Small Stream | Good | 56.1 ft | 15 | 2010 |
| Local over Small Stream | Good | 24.0 ft | 15 | 2005 |
| 200th ST over Small Stream | Good | 32.2 ft | 15 | 2015 |
| 136th ST over Buffalo CR | Good | 111.9 ft | 15 | 2008 |
| 130th ST over Hunter Creek | Good | 89.9 ft | 15 | 2016 |
| Washington AVE over Small Creek | Good | 24.0 ft | 15 | 2013 |
| 270th ST over Small Stream | Good | 24.9 ft | 15 | 2021 |
| 288th Street over Small Stream | Good | 24.0 ft | 11 | 2000 |
| Local 295th St. over Small Stream | Good | 27.9 ft | 11 | 2004 |
| Loc Union AVE over Small Stream | Good | 22.0 ft | 11 | 1988 |
| 180th ST over Malone Creek | Good | 24.0 ft | 11 | 2004 |
| Postel Avenue over Creek | Good | 23.0 ft | 10 | 2005 |