| 150th over Beaver Dam Creek | Poor | 100.1 ft | 687 | 1961 |
| B65 120th ST over Bailey Creek | Poor | 122.0 ft | 403 | 1956 |
| Vine ST over Rock Falls Creek | Poor | 30.8 ft | 324 | 1966 |
| 275th over Willow Creek | Poor | 65.0 ft | 91 | 1941 |
| Hickory AVE over Calmus Creek | Poor | 24.9 ft | 44 | 1917 |
| E-w 7th AVE N over Willow Creek | Poor | 45.9 ft | 26 | 1900 |
| Violet ST over Rock Falls Creek | Poor | 28.9 ft | 26 | 1900 |
| Finch over Waterway | Poor | 23.0 ft | 25 | 1965 |
| 200th over Creek | Poor | 22.0 ft | 21 | 1937 |
| Fir over Beaver Dam Creek | Poor | 102.0 ft | 21 | 1927 |
| 200th over E Br Beaver Dam Creek | Poor | 24.0 ft | 16 | 1965 |
| 180th over East Creek | Poor | 21.0 ft | 16 | 1937 |
| Killdeer over Beaver Dam Creek | Poor | 59.1 ft | 16 | 1900 |
| Quail over Beaver Dam Creek | Poor | 60.0 ft | 15 | 1913 |
| I-35 over Calmus Creek | Fair | 26.9 ft | 21,400 | 1970 |
| I-35 over Drainage Ditch | Fair | 27.9 ft | 17,700 | 1972 |
| I-35 over Drainage Ditch | Fair | 22.0 ft | 17,600 | 1971 |
| I 35 over Drainage Ditch | Fair | 22.0 ft | 17,600 | 1972 |
| I-35 over Willow Creek | Fair | 27.9 ft | 17,200 | 1971 |
| US 18 over Willow Creek | Fair | 35.1 ft | 14,400 | 1952 |
| NB I-35 over Over Imrl Rr | Fair | 179.1 ft | 11,100 | 1970 |
| I 35 SB over Main ST | Fair | 216.9 ft | 10,800 | 1970 |
| NB I-35 over Co RD (b-35) | Fair | 153.9 ft | 10,750 | 1972 |
| SB I-35 over Winnebago River | Fair | 247.0 ft | 10,500 | 1971 |
| 12th ST NW over Up Rr | Fair | 658.1 ft | 10,174 | 2005 |
| NB I-35 over 4th AVE S | Fair | 230.0 ft | 9,800 | 1970 |
| SB I-35 over 4th AVE S | Fair | 230.0 ft | 9,550 | 1970 |
| 19th ST SW over Cheslea Creek | Fair | 49.9 ft | 9,148 | 1931 |
| 13th ST NE over Winnebago River | Fair | 102.0 ft | 9,091 | 1938 |
| I 35 NB over 190th ST | Fair | 146.0 ft | 9,050 | 1972 |
| NB I-35 over Cerro Gordo County Trail | Fair | 179.1 ft | 9,000 | 1972 |
| SB I-35 over Beaver Dam Creek | Fair | 146.0 ft | 8,900 | 1972 |
| SB I-35 over Cerro Gordo County Trail | Fair | 179.1 ft | 8,850 | 1972 |
| NB I-35 over Bailey Creek | Fair | 98.1 ft | 8,800 | 1971 |
| SB I 35 over Bailey Creek | Fair | 98.1 ft | 8,650 | 1971 |
| I 35 NB over US 18 | Fair | 274.9 ft | 8,600 | 1971 |
| SB I-35 over US 18 | Fair | 274.9 ft | 8,400 | 1971 |
| S Monroe AVE over Willow Creek | Fair | 109.9 ft | 7,094 | 1963 |
| 1st ST NW over Willow Creek | Fair | 128.0 ft | 7,043 | 1978 |
| Ia 122 EB over Willow Creek | Fair | 53.1 ft | 6,850 | 1933 |
| Ia 122 WB over Willow Creek | Fair | 52.2 ft | 6,850 | 1970 |
| US 65 over Calamus Creek | Fair | 45.9 ft | 6,000 | 1970 |
| E State ST over Willow Creek | Fair | 64.0 ft | 5,897 | 1920 |
| US 18 WB over Winnebago River & Road | Fair | 298.9 ft | 5,500 | 1998 |
| US 18 WB over Little Lime Creek | Fair | 111.9 ft | 5,500 | 1997 |
| B35 255th ST over Crane Creek | Fair | 92.8 ft | 5,106 | 1977 |
| Iowa 122 over Ideal Creek | Fair | 44.9 ft | 4,930 | 1952 |
| US 65 over Blake Creek | Fair | 30.8 ft | 4,690 | 1955 |
| US 65 over Blake Creek | Fair | 47.6 ft | 4,690 | 1955 |
| US 65 over Blair Creek | Fair | 78.1 ft | 4,480 | 1975 |
| US 18 EB over Cerro Gordo County Trail | Fair | 173.9 ft | 4,450 | 1997 |
| N Illinois AVE over Winnebago River | Fair | 217.8 ft | 3,886 | 1970 |
| N. Pierce AVE over Willow Creek | Fair | 168.0 ft | 3,696 | 1957 |
| N Kentucky AVE over Winnebago River | Fair | 217.8 ft | 3,427 | 1962 |
| Eisenhower AVE over Willow Creek | Fair | 49.9 ft | 3,347 | 1949 |
| Mallard over Calmus Creek | Fair | 75.1 ft | 3,290 | 1964 |
| 6th ST SW over Cheslea Creek | Fair | 42.0 ft | 3,207 | 1962 |
| SB US 65 over Willow Creek | Fair | 131.9 ft | 3,200 | 1968 |
| NB US 65 over Willow Creek | Fair | 201.1 ft | 2,950 | 1970 |
| Co RD B30 over Over Ianr Rr | Fair | 232.0 ft | 2,750 | 1955 |
| 300th over Calmus Creek | Fair | 75.1 ft | 2,701 | 1968 |
| 1st ST NW over Chesalea Creek | Fair | 27.9 ft | 2,617 | 1955 |
| 15th ST SW over Cheslea Creek | Fair | 70.9 ft | 2,567 | 1980 |
| Co B-20 over I-35 | Fair | 297.9 ft | 2,318 | 1970 |
| N Carolina AVE over Winnebago River | Fair | 116.1 ft | 2,278 | 1914 |
| US 65 over West Fork Cedar River | Fair | 213.9 ft | 2,230 | 1957 |
| US 65 over Beaver Dam Creek | Fair | 24.0 ft | 2,230 | 1932 |
| Thrush over Winnebago River | Fair | 225.1 ft | 2,082 | 1962 |
| Broad ST over Beaver Creek | Fair | 125.0 ft | 1,978 | 1966 |
| 240th over Chesalea Creek | Fair | 24.9 ft | 1,571 | 2004 |
| 1st ST SW over Willow Creek | Fair | 109.9 ft | 1,512 | 1966 |
| Nettle AVE over Chesalea Creek | Fair | 28.9 ft | 1,394 | 1972 |
| Lake ST over Small Stream | Fair | 26.9 ft | 1,290 | 1900 |
| 2nd ST SW over Willow Creek | Fair | 100.1 ft | 1,097 | 1965 |
| Lark over Willow Creek | Fair | 38.1 ft | 1,061 | 1970 |
| Lark over Crane Creek | Fair | 44.9 ft | 1,061 | 1971 |
| 310th over Winnebago River | Fair | 168.0 ft | 992 | 1960 |
| No Shore DR over Stream | Fair | 55.1 ft | 953 | 1972 |
| Spring ST over Shell Rock River | Fair | 142.1 ft | 919 | 1929 |
| Thrush over Creek | Fair | 22.0 ft | 903 | 1932 |
| Grouse over Willow Creek | Fair | 24.9 ft | 884 | 1968 |
| N 20th St(prop) over Willow Creek | Fair | 171.9 ft | 829 | 1994 |
| S25 Grouse AVE over Beaver Dam Creek | Fair | 32.2 ft | 815 | 1986 |
| Balsam over Winnebago River | Fair | 173.9 ft | 815 | 1969 |
| N 40th ST over Willow Creek | Fair | 80.1 ft | 731 | 1970 |
| 26th St. S.w. over Cheslea Creek | Fair | 83.0 ft | 644 | 1989 |
| Killdeer over Calmus Creek | Fair | 39.0 ft | 628 | 1981 |
| 150th over Cold Water Creek | Fair | 28.9 ft | 609 | 1971 |
| Lark over Beaver Dam Creek | Fair | 75.1 ft | 589 | 1973 |
| B-15 over Beaver Creek | Fair | 129.9 ft | 579 | 1957 |
| Jonquil AVE over Willow Creek | Fair | 47.9 ft | 577 | 1997 |
| B15 330th ST over Spring Creek | Fair | 122.0 ft | 570 | 1957 |
| Co B-60 over I-35 | Fair | 317.9 ft | 471 | 1972 |
| 330th over Wharam Creek | Fair | 35.1 ft | 432 | 1983 |
| Killdeer over Winnebago River | Fair | 225.1 ft | 432 | 1984 |
| Co RD B-65 over I-35 | Fair | 278.9 ft | 363 | 1972 |
| Killdeer over Crane Creek | Fair | 25.9 ft | 361 | 1973 |
| 190th over Beaver Creek | Fair | 24.0 ft | 304 | 1961 |
| Lark over Bailey Creek | Fair | 75.1 ft | 275 | 1974 |
| Zinnia over Rock Creek | Fair | 34.1 ft | 265 | 1961 |
| I 35 SB Off Ramp over Beaver Dam Creek | Fair | 21.0 ft | 210 | 1972 |
| Vine over Beaver Creek | Fair | 67.9 ft | 187 | 1961 |
| 12th ST NW over Willow Creek | Fair | 55.1 ft | 150 | 1964 |
| Jonquil AVE over West Fork Beaver Dam CR | Fair | 38.1 ft | 147 | 1981 |
| Benjamin AVE over Cheslea Creek | Fair | 67.9 ft | 147 | 1982 |
| I-35 NB Off Rmp over Beaver Dam Creek | Fair | 22.0 ft | 130 | 1972 |
| S Birch DR over Stream | Fair | 34.1 ft | 104 | 1928 |
| Fir over Willow Creek | Fair | 33.1 ft | 82 | 1918 |
| Jonquil over W Br Beaver Dam Creek | Fair | 75.1 ft | 69 | 1955 |
| 170th over E Br Beaver Dam Creek | Fair | 40.0 ft | 69 | 1973 |
| Wheelerwood over Winnebago River | Fair | 89.9 ft | 69 | 1933 |
| 130th over Creek | Fair | 23.0 ft | 62 | 1913 |
| 315th over Rock Falls Creek | Fair | 29.9 ft | 62 | 1924 |
| 170th over Beaver Dam Creek | Fair | 76.1 ft | 59 | 1981 |
| 320th over Creek | Fair | 69.9 ft | 59 | 1955 |
| 250th over Winnebago River | Fair | 100.1 ft | 51 | 1923 |
| 130th over Beaver Dam Creek | Fair | 149.9 ft | 49 | 1959 |
| 130th over E Br Beaver Dam Creek | Fair | 71.9 ft | 49 | 1953 |
| 340th over Spring Creek | Fair | 49.9 ft | 47 | 1985 |
| Killdeer over W Fork Beaver Dam Creek | Fair | 33.1 ft | 41 | 1926 |
| Jonquil over Calmus Creek | Fair | 38.1 ft | 41 | 1974 |
| Apple over Winnebago Riv | Fair | 149.9 ft | 41 | 1953 |
| B-15 over I-35 | Fair | 293.0 ft | 39 | 1971 |
| 150th over Creek | Fair | 70.9 ft | 39 | 1950 |
| 340th over Rock Falls Creek | Fair | 30.8 ft | 39 | 1924 |
| Quail AVE over Creek | Fair | 25.9 ft | 35 | 1945 |
| Cerro Gordo ST over Small Stream | Fair | 23.0 ft | 34 | 1972 |
| Nettle over E Br Beaver Dam Creek | Fair | 39.0 ft | 30 | 1993 |
| 250th over Little Lime Creek | Fair | 67.9 ft | 30 | 1959 |
| Wren over Winnebago River | Fair | 149.9 ft | 30 | 1935 |
| 250th over Crane CR | Fair | 38.1 ft | 30 | 1941 |
| Nettle over Drainage | Fair | 56.1 ft | 30 | 2005 |
| 180th over E Br Beaver Dam Creek | Fair | 35.1 ft | 26 | 1965 |
| Eagle over Drainage Ditch #70 | Fair | 25.9 ft | 25 | 1983 |
| Apple over Galls Creek | Fair | 22.0 ft | 21 | 1954 |
| 320th ST over Wharam Creek | Fair | 23.0 ft | 21 | 1914 |
| Vine over Cold Water Creek | Fair | 75.1 ft | 16 | 1972 |
| Indigo over W Fork Beaver Dam Creek | Fair | 22.0 ft | 16 | 1940 |
| 110th over Cold Water Creek | Fair | 70.9 ft | 15 | 1948 |
| Finch over Creek | Fair | 66.9 ft | 15 | 1978 |
| Finch over Beaver Dam Creek | Fair | 23.0 ft | 15 | 1962 |
| 130th over Coldwater Creek | Fair | 44.9 ft | 11 | 1974 |
| 140th over Beaver Dam Creek | Fair | 49.9 ft | 11 | 1923 |
| 105th over Beaver Dam Creek | Fair | 162.1 ft | 11 | 1959 |
| 110th over W Branch Beaver Dam Crk | Fair | 69.9 ft | 11 | 1960 |
| 220th over Bad Lands Draw | Fair | 32.2 ft | 11 | 1978 |
| Wheelerwood over Winnebago River | Fair | 120.1 ft | 11 | 1952 |
| 130th over W Br Beaver Dam Creek | Fair | 78.1 ft | 10 | 1979 |
| 200th over Beaver Dam Creek | Fair | 33.1 ft | 5 | 1918 |
| Ia 122 over Cheslea Creek | Good | 40.0 ft | 18,800 | 2010 |
| I-35 over Drainage Ditch | Good | 22.0 ft | 18,100 | 1972 |
| SB I-35 over Imrl Rr | Good | 179.1 ft | 10,800 | 1970 |
| NB I-35 over Winnebago River | Good | 247.0 ft | 10,700 | 1970 |
| I 35 SB over B 35 (240th St) | Good | 153.9 ft | 10,500 | 1972 |
| NB I 35 over Main ST | Good | 216.9 ft | 9,800 | 1970 |
| NB I-35 over Beaver Dam Creek | Good | 146.0 ft | 9,050 | 1972 |
| SB I-35 over 190th ST | Good | 146.0 ft | 8,900 | 1972 |
| US 18 over Crane Creek | Good | 21.0 ft | 8,300 | 1998 |
| 12th ST NW over Willow Creek | Good | 97.1 ft | 8,292 | 2019 |
| Ia 122 over Winnebago River | Good | 195.9 ft | 6,800 | 1984 |
| 19th Street SW over Up Rr & Armory RD | Good | 607.9 ft | 6,588 | 2008 |
| US 65 over US 18 | Good | 233.9 ft | 5,800 | 1996 |
| US 18 EB over Winnebago River & Road | Good | 298.9 ft | 5,500 | 1998 |
| US 18 EB over Little Lime Creek | Good | 111.9 ft | 5,500 | 1997 |
| US 18 WB over Uprr | Good | 173.9 ft | 5,250 | 1999 |
| EB US 18 over Uprr | Good | 173.9 ft | 5,250 | 1999 |
| US 65 over Spring Creek | Good | 188.0 ft | 4,690 | 2009 |
| US 18 EB Ia 27 SB over Uprr | Good | 217.8 ft | 4,450 | 1997 |
| US 18 WB Ia 27 NB over Up Rr | Good | 214.9 ft | 4,450 | 1997 |
| US 18 WB over Cerro Gordo County Trail | Good | 173.9 ft | 4,450 | 1997 |
| NB US 65 over Winnebago River | Good | 221.1 ft | 3,300 | 1969 |
| SB US 65 over Winnebago River | Good | 223.1 ft | 3,250 | 2009 |
| S Penn AVE over Willow Creek | Good | 215.9 ft | 3,087 | 1981 |
| US 65 over E Branch Beaver Dam Crk | Good | 150.9 ft | 2,490 | 2020 |
| US 65 over E Branch Beaver Dam Crk | Good | 150.9 ft | 2,490 | 2020 |
| US 65 over E Branch Beaverdam Creek | Good | 214.9 ft | 2,490 | 2020 |
| US 65 over E Branch Beaver Dam Crk | Good | 153.2 ft | 2,230 | 2021 |
| 12th ST NE over Ideal Creek | Good | 90.9 ft | 2,128 | 2023 |
| Co RD S-56 over US 18 | Good | 233.9 ft | 1,895 | 1998 |
| Mallard AVE over US 18 | Good | 225.1 ft | 1,502 | 1998 |
| Nettle over Chesalea Creek | Good | 28.9 ft | 1,394 | 1972 |
| US 18 EB over I-35 | Good | 393.0 ft | 1,310 | 1998 |
| W Madison ST over E Br Beaver Dam Creek | Good | 73.8 ft | 1,280 | 2014 |
| 4th ST NE over Willow Creek | Good | 32.2 ft | 1,093 | 1961 |
| 1st ST over Drainage Ditch | Good | 75.1 ft | 1,049 | 2005 |
| 12th AVE S over Clear Creek | Good | 30.8 ft | 818 | 2016 |
| Lark AVE over US 18 | Good | 225.1 ft | 786 | 1998 |
| S18 Eagle AVE over Willow Creek | Good | 20.7 ft | 727 | 2019 |
| S56 Thrush AVE over Beaver Creek | Good | 24.9 ft | 697 | 2018 |
| SR B-43 over I-35 | Good | 276.9 ft | 687 | 1972 |
| 1st ST over Drainage Ditch | Good | 76.8 ft | 679 | 2018 |
| Willowbrook DR over Chesalea Creek | Good | 44.9 ft | 644 | 1989 |
| US 18 WB over I-35 | Good | 400.9 ft | 610 | 1998 |
| Ash ST over W Br Beaver Dam Creek | Good | 52.2 ft | 599 | 2018 |
| B20 300th ST over Spring Creek | Good | 127.0 ft | 589 | 2016 |
| 150th ST over Unnamed Creek | Good | 24.9 ft | 530 | 2010 |
| S Delaware AVE over Willow Creek | Good | 87.6 ft | 460 | 2011 |
| B43 210th ST over E Br Beaver Dam Creek | Good | 22.0 ft | 412 | 2006 |
| B65 Larch ST over Drainage Ditch | Good | 26.9 ft | 410 | 2022 |
| 300th Court over Wharam Creek | Good | 25.9 ft | 350 | 2018 |
| S56 Thrush AVE over Cold Water Creek | Good | 39.7 ft | 344 | 2016 |
| Pheasant over E Br Beaver Dam Creek | Good | 52.2 ft | 334 | 1980 |
| Pheasant over E Br Beaver Dam Creek | Good | 52.2 ft | 334 | 1983 |
| 19th ST SE over Mason Creek | Good | 49.2 ft | 281 | 2016 |
| Lark over West Fork Beaver Dam CR | Good | 39.0 ft | 275 | 1978 |
| 330th over Blair Creek | Good | 75.1 ft | 236 | 1966 |
| 5th ST So over Old Channel Creek | Good | 83.0 ft | 232 | 2009 |
| Yarrow over Cold Water Creek | Good | 90.9 ft | 206 | 2011 |
| 330th over Shell Rock River | Good | 175.9 ft | 196 | 2003 |
| Main ST over Beaver Creek | Good | 60.0 ft | 167 | 2021 |
| 285th ST over Small Stream | Good | 26.2 ft | 135 | 2016 |
| Indigo over Beaver Dam Creek | Good | 24.0 ft | 82 | 1998 |
| 340th over Shell Rock River | Good | 167.0 ft | 82 | 2010 |
| Spruce AVE over Rose Creek | Good | 114.2 ft | 79 | 2014 |
| Dogwood over Winnebago River | Good | 163.1 ft | 73 | 2006 |
| 278th over Shell Rock Creek | Good | 205.1 ft | 62 | 1965 |
| 295th over Shell Rock River | Good | 333.0 ft | 62 | 1985 |
| 140th over Creek | Good | 33.1 ft | 59 | 1978 |
| Jonquil over Small Creek | Good | 25.9 ft | 59 | 1981 |
| 320th over Rock Falls Creek | Good | 123.0 ft | 51 | 2008 |
| 295th over Gravel Creek | Good | 25.9 ft | 51 | 2003 |
| 290th ST over Ideal Creek | Good | 39.7 ft | 51 | 2021 |
| Local over Baileye Creek | Good | 128.0 ft | 51 | 1991 |
| Jonquil AVE over US 18 Reloc. | Good | 233.9 ft | 51 | 1998 |
| 330 TH over Rock Falls Creek | Good | 29.9 ft | 49 | 1971 |
| 155th over E Branch Beaver Dam Ck | Good | 80.1 ft | 47 | 1970 |
| Warbler over Little Lime Creek | Good | 100.1 ft | 47 | 2001 |
| 290th over Shell Rock River | Good | 201.1 ft | 47 | 1998 |
| 320th over Spring Creek | Good | 24.0 ft | 47 | 1984 |
| Dove over Willow Creek | Good | 102.0 ft | 47 | 1982 |
| 285th over Small Stream | Good | 29.9 ft | 47 | 2003 |
| Warbler AVE over US 18 | Good | 224.1 ft | 47 | 1997 |
| Ulmus over Beaver Creek | Good | 21.0 ft | 44 | 1970 |
| Nettle AVE over Creek | Good | 22.0 ft | 41 | 1955 |
| Yarrow over Beaver Creek | Good | 87.9 ft | 41 | 1992 |
| 190th over E Br Beaver Dam Creek | Good | 43.0 ft | 41 | 1982 |
| 340th over Rose Creek | Good | 125.0 ft | 41 | 2002 |
| Clay Banks over Little Lime Creek | Good | 76.1 ft | 39 | 1985 |
| 230th ST over Crane Creek | Good | 22.6 ft | 39 | 2012 |
| Indigo over W Br Beaver Dam Creek | Good | 78.1 ft | 35 | 1980 |
| 140th ST over W Branch Beaver Dam Crk | Good | 31.2 ft | 35 | 2016 |
| Ulmus over Creek | Good | 27.9 ft | 35 | 1967 |
| Indigo AVE over Calmus Creek | Good | 26.2 ft | 35 | 2020 |
| 180th ST over Beaver Dam Creek | Good | 25.9 ft | 34 | 2021 |
| Jonquil over Beaver Dam Creek | Good | 75.1 ft | 34 | 1978 |
| 120th ST over Drainage Ditch | Good | 44.0 ft | 34 | 2023 |
| 140th over E Br Beaver Dam Creek | Good | 82.0 ft | 30 | 1976 |
| Nettle over Beaver Dam Creek | Good | 152.9 ft | 30 | 1985 |
| 160th ST over Beaver Dam Creek | Good | 83.7 ft | 30 | 2023 |
| Heather over W Branch Beaver Dam Crk | Good | 83.0 ft | 30 | 2010 |
| 120th over Bailey Creek | Good | 89.9 ft | 30 | 2011 |
| 225th ST over Bad Lands Draw | Good | 25.9 ft | 30 | 2019 |
| Mallard AVE over Beaver Dam Creek | Good | 39.7 ft | 29 | 2012 |
| FM over I-35 | Good | 282.2 ft | 29 | 1972 |
| Warbler over Beaver Creek | Good | 88.9 ft | 26 | 1990 |
| 190th over Beaver Dam Creek | Good | 44.0 ft | 26 | 1972 |
| Cardinal over Winnebago River | Good | 150.9 ft | 26 | 1998 |
| 120th over Lillibridge Creek | Good | 44.9 ft | 25 | 1979 |
| 340th over Small Stream | Good | 25.9 ft | 25 | 1982 |
| Mallard over W Fork Beaver Dam Creek | Good | 41.0 ft | 21 | 1944 |
| Lark over Wharam Creek | Good | 74.1 ft | 21 | 2005 |
| 160th over Beemis Creek | Good | 32.2 ft | 15 | 1978 |
| Yarrow over Little Lime Creek | Good | 82.0 ft | 15 | 1979 |
| 310th ST over Stream | Good | 22.0 ft | 15 | 2021 |
| 140th ST over Cold Water Creek | Good | 29.9 ft | 11 | 2006 |
| Local over Cold Water Creek | Good | 111.9 ft | 11 | 2006 |
| 120th over Cold Water Creek | Good | 46.9 ft | 11 | 1985 |
| Ulmus over Files Ditch | Good | 24.9 ft | 10 | 1953 |