| South AVE over Iowa River | Poor | 169.9 ft | 1,041 | 1957 |
| HWY 215 over Small Natural Stream | Poor | 30.8 ft | 854 | 1947 |
| HWY 215 over Small Natural Stream | Poor | 44.0 ft | 854 | 1948 |
| FM over Dd | Poor | 67.9 ft | 776 | 1971 |
| FM over Tipton CR | Poor | 111.9 ft | 687 | 1974 |
| FM over Minerva Creek | Poor | 44.0 ft | 550 | 1972 |
| FM over Elk Creek | Poor | 55.1 ft | 491 | 1964 |
| FM over Creek | Poor | 20.0 ft | 462 | 1960 |
| FM over Honey Creek | Poor | 87.9 ft | 373 | 1967 |
| FM over Creek | Poor | 22.0 ft | 373 | 1900 |
| FM over South Fork Iowa River | Poor | 128.0 ft | 373 | 1964 |
| FM over Beaver Creek | Poor | 101.0 ft | 334 | 1967 |
| FM over Tipton Creek | Poor | 63.0 ft | 334 | 1900 |
| Local over Creek | Poor | 75.1 ft | 275 | 1972 |
| FM over Creek | Poor | 21.0 ft | 255 | 1942 |
| Co. Rd. D-35 over Beaver Creek | Poor | 103.0 ft | 250 | 1960 |
| FM over Creek | Poor | 58.1 ft | 177 | 1970 |
| FM over Creek | Poor | 78.1 ft | 108 | 1973 |
| Local over Creek | Poor | 37.1 ft | 91 | 1978 |
| Local over Honey Creek | Poor | 69.9 ft | 73 | 1984 |
| FM over Creek | Poor | 37.1 ft | 73 | 1977 |
| Local over Drainage Ditch | Poor | 37.1 ft | 73 | 1978 |
| Local over Creek | Poor | 35.1 ft | 69 | 1960 |
| Local over Iowa River (south Fork) | Poor | 128.0 ft | 62 | 1997 |
| Local over Creek | Poor | 36.1 ft | 62 | 1990 |
| FM over Honey Creek | Poor | 78.1 ft | 59 | 1985 |
| Local over Tipton Creek | Poor | 88.9 ft | 51 | 1983 |
| Local over Beaver Creek | Poor | 52.2 ft | 51 | 1987 |
| Local over South Fork Iowa River | Poor | 68.9 ft | 51 | 1982 |
| FM over Bear Creek | Poor | 49.9 ft | 44 | 1996 |
| FM over South Fork Iowa River | Poor | 103.0 ft | 44 | 1954 |
| FM over South Fork Iowa River | Poor | 26.9 ft | 44 | 1900 |
| Local over Creek | Poor | 37.1 ft | 41 | 1983 |
| Local over Dd | Poor | 32.2 ft | 41 | 1925 |
| Local over Dd | Poor | 34.1 ft | 41 | 1900 |
| FM over Creek | Poor | 34.1 ft | 39 | 1988 |
| Local over Beaver Creek | Poor | 52.2 ft | 39 | 1984 |
| Local over South Fork Iowa River | Poor | 85.0 ft | 39 | 1939 |
| Local over Tipton Creek | Poor | 91.9 ft | 35 | 1989 |
| FM over Creek | Poor | 126.0 ft | 34 | 1960 |
| Local over Minerva Creek | Poor | 52.2 ft | 30 | 1984 |
| Local over Tipton Creek | Poor | 69.9 ft | 30 | 1984 |
| Local over Honey Creek | Poor | 59.1 ft | 30 | 1988 |
| Local over Honey Creek | Poor | 46.9 ft | 29 | 1982 |
| Local over Beaver Creek | Poor | 87.9 ft | 29 | 1985 |
| Local over Iowa River (south Fork) | Poor | 104.0 ft | 29 | 1956 |
| Local over South Fork | Poor | 46.9 ft | 29 | 1919 |
| Local over Creek | Poor | 46.9 ft | 26 | 1986 |
| Local over Honey Creek | Poor | 60.0 ft | 26 | 1986 |
| Local over Tilton Creek | Poor | 34.1 ft | 26 | 1981 |
| Local over Drainage | Poor | 44.9 ft | 26 | 1976 |
| FM over Dd | Poor | 58.1 ft | 25 | 1963 |
| Local over Honey Creek | Poor | 77.1 ft | 21 | 1953 |
| Local over Honey Creek | Poor | 32.2 ft | 21 | 1980 |
| Local over Creek | Poor | 35.1 ft | 21 | 1991 |
| Local over Small Stream | Poor | 42.0 ft | 20 | 1987 |
| Local over Tipton Creek | Poor | 120.1 ft | 20 | 1900 |
| Local over Tipton Creek | Poor | 57.1 ft | 20 | 1985 |
| Local over Stream | Poor | 50.9 ft | 16 | 1981 |
| Local over Honey Creek | Poor | 78.1 ft | 16 | 1919 |
| Local over Creek | Poor | 28.9 ft | 16 | 1977 |
| Local over Creek | Poor | 32.2 ft | 16 | 1989 |
| Local over Honey Creek | Poor | 70.9 ft | 16 | 1963 |
| Local over Tipton Creek | Poor | 52.2 ft | 16 | 1987 |
| Local over Beaver Creek | Poor | 129.9 ft | 15 | 1958 |
| FM over Beaver Creek | Poor | 45.9 ft | 15 | 1982 |
| Local over Creek | Poor | 46.9 ft | 15 | 1978 |
| Local over Ia River | Poor | 97.1 ft | 11 | 1965 |
| FM over Creek | Poor | 52.2 ft | 5 | 1985 |
| Washington ST over Iowa River | Fair | 379.9 ft | 6,251 | 1934 |
| US 20 EB over D 35 (elm St) | Fair | 184.1 ft | 4,900 | 2003 |
| Ia 175 over Iowa River | Fair | 451.1 ft | 3,370 | 1984 |
| HWY 941 over Iowa River | Fair | 219.2 ft | 2,701 | 1979 |
| HWY 941 over Iowa River | Fair | 146.0 ft | 2,357 | 1932 |
| Ia 175 over Beaver Creek | Fair | 170.9 ft | 2,260 | 1990 |
| US 65 over Up Rr | Fair | 118.1 ft | 2,020 | 1936 |
| Ia 57 over W Branch Cedar River | Fair | 54.1 ft | 1,940 | 1960 |
| US 65 over Little Beaver Creek | Fair | 92.8 ft | 1,720 | 1976 |
| River ST over Iowa River | Fair | 180.1 ft | 1,698 | 1922 |
| FM over Creek | Fair | 55.1 ft | 1,493 | 1970 |
| Ia 175 over Honey Creek | Fair | 98.1 ft | 1,320 | 1991 |
| HWY 359 over S Fork Iowa River | Fair | 169.9 ft | 1,286 | 1958 |
| FM over Iowa River | Fair | 288.1 ft | 1,061 | 1981 |
| HWY 215 over S Fork Iowa River | Fair | 297.9 ft | 894 | 1949 |
| HWY 215 over Small Natural Stream | Fair | 30.8 ft | 894 | 1947 |
| Pierce ST over Rock Run | Fair | 29.9 ft | 672 | 1980 |
| HWY 299 over S Fork Iowa River | Fair | 185.0 ft | 609 | 1939 |
| FM over Creek | Fair | 75.1 ft | 442 | 1982 |
| Fremont ST over Rock Run | Fair | 40.0 ft | 424 | 1940 |
| Main ST over Iowa River | Fair | 162.1 ft | 387 | 1936 |
| Local over Honey Creek | Fair | 87.9 ft | 340 | 1987 |
| FM over Creek | Fair | 36.1 ft | 285 | 1967 |
| Local over Creek | Fair | 49.9 ft | 285 | 1995 |
| Mildred AVE over Wildcat Glen | Fair | 69.9 ft | 253 | 1933 |
| FM over Tipton Creek | Fair | 86.0 ft | 236 | 1968 |
| FM over Creek | Fair | 44.0 ft | 177 | 1970 |
| FM over Drainage Ditch | Fair | 33.1 ft | 177 | 1970 |
| FM over Creek | Fair | 24.0 ft | 147 | 1921 |
| FM over Creek | Fair | 49.9 ft | 104 | 1988 |
| Local over Creek | Fair | 49.9 ft | 98 | 1991 |
| Local over Creek | Fair | 32.2 ft | 91 | 1979 |
| FM over S. Fork Iowa River | Fair | 204.1 ft | 88 | 1978 |
| Local over Iowa River | Fair | 216.9 ft | 88 | 1978 |
| FM over Iowa River | Fair | 213.9 ft | 79 | 1976 |
| FM over Iowa River | Fair | 213.9 ft | 79 | 1979 |
| 290th ST over Creek | Fair | 55.1 ft | 69 | 2000 |
| Hidden Vally DR over Elk Run | Fair | 92.8 ft | 66 | 1977 |
| FM over Stream | Fair | 49.9 ft | 59 | 1997 |
| FM over Iowa River | Fair | 243.1 ft | 59 | 1978 |
| FM over Bear Creek | Fair | 126.0 ft | 59 | 1900 |
| H Avenue over US 20 | Fair | 263.1 ft | 59 | 1990 |
| Local over Honey Creek | Fair | 111.9 ft | 51 | 1981 |
| Local over Creek | Fair | 50.9 ft | 51 | 1991 |
| Local over Creek | Fair | 42.0 ft | 51 | 1989 |
| Local over Honey Creek | Fair | 74.1 ft | 51 | 1985 |
| Local over Iowa River | Fair | 215.9 ft | 51 | 1977 |
| FM over Iowa River | Fair | 213.9 ft | 47 | 1982 |
| Local over South Fork Iowa River | Fair | 125.0 ft | 47 | 1980 |
| Local over Minerva Creek | Fair | 40.0 ft | 47 | 1994 |
| FM over Beaver Creek | Fair | 75.1 ft | 44 | 1942 |
| FM over Iowa River | Fair | 215.9 ft | 44 | 1977 |
| Local over Creek | Fair | 44.9 ft | 41 | 1956 |
| Local over Iowa River | Fair | 243.1 ft | 41 | 1983 |
| Local over Bear Creek | Fair | 30.8 ft | 35 | 1979 |
| Local over South Fork Iowa River | Fair | 125.0 ft | 35 | 1985 |
| Local over Honey Creek | Fair | 87.9 ft | 34 | 1981 |
| FM over Small | Fair | 80.1 ft | 34 | 1983 |
| Local over Tipton Creek | Fair | 115.2 ft | 30 | 2003 |
| Local over Elk Creek | Fair | 46.9 ft | 30 | 1981 |
| Local over Dd | Fair | 32.2 ft | 30 | 1988 |
| Local over Creek | Fair | 47.9 ft | 30 | 1987 |
| FM over Creek | Fair | 30.8 ft | 29 | 1979 |
| Local over Tipton Creek | Fair | 78.1 ft | 29 | 1988 |
| Local over Honey Creek | Fair | 52.2 ft | 26 | 1980 |
| Local over Ia River | Fair | 82.0 ft | 26 | 1957 |
| Local over Small Stream | Fair | 52.2 ft | 26 | 1987 |
| Local over So.fk. Iowa River | Fair | 62.0 ft | 26 | 1990 |
| FM over Creek | Fair | 49.9 ft | 25 | 1992 |
| Local over Tipton Creek | Fair | 70.9 ft | 25 | 1900 |
| Jj Avenue over US 20 | Fair | 263.1 ft | 25 | 1990 |
| Local over South Fork Iowa River | Fair | 150.9 ft | 21 | 1986 |
| Local over Creek | Fair | 30.8 ft | 20 | 1990 |
| Local over Minerva Creek | Fair | 36.1 ft | 20 | 1989 |
| FM over Bear Creek | Fair | 42.0 ft | 20 | 1986 |
| Local over Creek | Fair | 44.0 ft | 20 | 1959 |
| Local over Drainage Ditch | Fair | 49.9 ft | 16 | 1994 |
| Local over Iowa River (south Fork) | Fair | 128.0 ft | 16 | 1989 |
| Local over South Fork | Fair | 53.1 ft | 16 | 1981 |
| FM over Bear Creek | Fair | 40.0 ft | 15 | 1985 |
| Local over Honey Creek | Fair | 100.1 ft | 15 | 1988 |
| Local over Creek | Fair | 37.1 ft | 15 | 1988 |
| Local over Honey Creek | Fair | 52.2 ft | 15 | 1983 |
| Local over Creek | Fair | 34.1 ft | 11 | 1995 |
| Local over Dd | Fair | 39.0 ft | 5 | 1990 |
| US 20 over Drainage | Good | 24.9 ft | 9,800 | 2003 |
| US 20 over Drainage | Good | 33.1 ft | 9,200 | 2003 |
| US 20 over Iowa River | Good | 1639.1 ft | 9,200 | 2003 |
| US 65 over Iowa River | Good | 293.6 ft | 7,800 | 2011 |
| US 65 over Beaver Creek | Good | 22.0 ft | 5,300 | 1976 |
| US 20 WB over D 35 (elm St) | Good | 184.1 ft | 4,900 | 2003 |
| US 20 EB over Beaver Creek | Good | 133.9 ft | 4,850 | 2003 |
| US 20 WB over Beaver Creek | Good | 133.9 ft | 4,850 | 2003 |
| WB US 20 over S. Fk Iowa River | Good | 170.9 ft | 4,650 | 1990 |
| WB US 20 over Over Up Rr | Good | 211.9 ft | 4,650 | 1990 |
| US 20 EB over Uprr | Good | 211.9 ft | 4,650 | 1999 |
| EB US 20 over South Fork Iowa River | Good | 170.9 ft | 4,650 | 1999 |
| US 20 EB over Iowa River Rr | Good | 217.8 ft | 4,500 | 2003 |
| U.s. 20 WB over Iowa River Rr | Good | 217.8 ft | 4,500 | 2003 |
| EB US 20 over Co RD S-27 | Good | 175.9 ft | 4,450 | 1990 |
| WB US 20 over Co RD S-27 | Good | 175.9 ft | 4,450 | 1990 |
| US 20 EB over US 65 | Good | 270.0 ft | 4,100 | 2003 |
| US 20 WB over US 65 | Good | 266.1 ft | 4,100 | 2003 |
| Ia 175 over Stream | Good | 24.9 ft | 3,280 | 1994 |
| Ia 175 over Little Beaver Creek | Good | 40.0 ft | 2,260 | 1961 |
| Ia 57 over Cc Rr | Good | 373.0 ft | 2,150 | 2013 |
| US 65 over S. Fork Iowa River | Good | 132.9 ft | 1,970 | 2007 |
| Main ST over Iowa River | Good | 168.0 ft | 1,858 | 2023 |
| US 65 over Honey Creek | Good | 154.2 ft | 1,820 | 2008 |
| Ia 175 over So Fork Iowa River | Good | 255.9 ft | 1,770 | 1981 |
| Ia 175 over Roberts Creek | Good | 21.0 ft | 1,700 | 1972 |
| S 56 over Pine Creek | Good | 62.0 ft | 1,650 | 1991 |
| S 56 over Elk Creek | Good | 110.9 ft | 1,650 | 2016 |
| US 65 & Ia 175 over Tipton Creek | Good | 190.0 ft | 1,620 | 2003 |
| S 56 over US 20 | Good | 304.1 ft | 1,453 | 2003 |
| US 65 over Minerva Creek | Good | 83.0 ft | 1,330 | 1985 |
| Ia 175 over Branch Honey Creek | Good | 28.9 ft | 1,320 | 1991 |
| D20 HWY 941 over S Fork Iowa River | Good | 103.0 ft | 943 | 2014 |
| HWY 941 (d20) over Drainage Ditch | Good | 23.0 ft | 943 | 2012 |
| D20 HWY 941 over Drainage Ditch | Good | 29.9 ft | 943 | 2015 |
| Sdb over Dowd Creek | Good | 82.0 ft | 766 | 2009 |
| D35 over US 20 | Good | 224.1 ft | 717 | 2003 |
| FM over Doud Creek | Good | 89.9 ft | 697 | 2010 |
| River RD over Elk Run Creek | Good | 41.3 ft | 390 | 2023 |
| S57 over Honey Creek | Good | 130.9 ft | 344 | 2022 |
| S27 over Tipton Creek | Good | 110.9 ft | 285 | 2021 |
| River AVE over Iowa River | Good | 226.0 ft | 257 | 1983 |
| FM over Minerva Creek | Good | 32.2 ft | 236 | 1998 |
| D 25 over Creek | Good | 34.1 ft | 177 | 2014 |
| FM over Drainage Ditch | Good | 125.0 ft | 177 | 2005 |
| Local over Creek | Good | 50.9 ft | 147 | 2002 |
| T Avenue over US 20 | Good | 224.1 ft | 108 | 2003 |
| 260th ST over Beaver Creek | Good | 130.9 ft | 91 | 2019 |
| V Avenue over US 20 | Good | 279.9 ft | 88 | 2003 |
| Local over Dd | Good | 55.1 ft | 82 | 2005 |
| D55 290th ST over Drainage | Good | 101.0 ft | 69 | 2016 |
| FM over Creek | Good | 49.9 ft | 69 | 1991 |
| M AVE over Honey Creek | Good | 103.0 ft | 62 | 2000 |
| X AVE over Pine Creek | Good | 29.9 ft | 51 | 2021 |
| Local over Beaver Creek | Good | 125.0 ft | 51 | 2003 |
| M AVE over South Fork Of Iowa River | Good | 130.9 ft | 47 | 2021 |
| D Avenue over US 20 | Good | 268.0 ft | 44 | 1990 |
| Local over Iowa River | Good | 125.0 ft | 39 | 1995 |
| FM over Beaver Creek | Good | 49.9 ft | 39 | 1996 |
| Local over Small Stream | Good | 49.9 ft | 35 | 1999 |
| FM over Ia River | Good | 128.0 ft | 34 | 2001 |
| Local over Creek | Good | 55.1 ft | 34 | 2005 |
| Local over Bear Creek | Good | 55.1 ft | 30 | 2004 |
| Local over Small Stream | Good | 44.0 ft | 30 | 1994 |
| Local over Bear Creek | Good | 49.9 ft | 30 | 1991 |
| Local over S.fk Iowa River | Good | 153.9 ft | 30 | 1990 |
| Local over Tipton Creek | Good | 100.1 ft | 30 | 1989 |
| Local over Small Stream | Good | 49.9 ft | 30 | 1992 |
| T AVE over Honey Creek | Good | 141.1 ft | 29 | 2023 |
| Rr AVE over Honey Creek | Good | 132.9 ft | 29 | 2011 |
| H AVE over Minerva Creek | Good | 52.2 ft | 26 | 2013 |
| 330th ST over Minerva Creek | Good | 103.0 ft | 26 | 2014 |
| D55 290th ST over Drainage | Good | 81.0 ft | 25 | 2017 |
| Local over Creek | Good | 49.9 ft | 25 | 1996 |
| Local over Creek | Good | 125.0 ft | 25 | 2006 |
| F AVE over Minerva Creek | Good | 53.1 ft | 25 | 2013 |
| 295th ST over Creek | Good | 49.9 ft | 21 | 2000 |
| 260th ST over Bear Creek | Good | 81.0 ft | 21 | 2017 |
| Local over Creek | Good | 48.9 ft | 21 | 1995 |
| Local over Creek | Good | 58.1 ft | 16 | 2001 |
| Local over Tipton Creek | Good | 100.1 ft | 11 | 1991 |
| 205th ST over Beaver Creek | Good | 30.8 ft | 11 | 2012 |
| Local over Minerva Creek | Good | 55.1 ft | 10 | 2004 |
| Local over Creek | Good | 49.9 ft | 10 | 1992 |
| L AVE over Tipton Creek | Good | 125.0 ft | 5 | 2007 |
| Local over Creek | Good | 49.9 ft | 5 | 2002 |
| Local over Creek | Good | 50.9 ft | 5 | 1999 |