| W Charles ST over Dry Run Creek | Poor | 44.0 ft | 2,673 | 1905 |
| Riverview Drive over Little Turkey River | Poor | 180.1 ft | 1,344 | 1954 |
| 1st AVE SW over Dry Run Creek | Poor | 35.1 ft | 1,273 | 1900 |
| Mill St. over Volga River | Poor | 220.1 ft | 959 | 1963 |
| Cedar RD over Mink Creek | Poor | 153.2 ft | 825 | 1957 |
| 10th ST SW over Otter Creek | Poor | 153.9 ft | 820 | 1963 |
| N Pine ST over Glovers Creek | Poor | 35.1 ft | 719 | 1914 |
| Center St. over Turkey River | Poor | 342.8 ft | 609 | 1953 |
| 40th ST over Hunter Creek | Poor | 35.1 ft | 471 | 1950 |
| D Ave. over Brush Creek | Poor | 145.0 ft | 442 | 1957 |
| Apple Rd. over Small Creek | Poor | 61.0 ft | 403 | 1968 |
| Juniper Rd. over Dry Branch Creek | Poor | 83.0 ft | 403 | 1964 |
| Juniper Rd. over Creek | Poor | 27.2 ft | 403 | 1962 |
| Scenic RD over Small Dry Run | Poor | 53.5 ft | 380 | 1920 |
| First ST over Volga River | Poor | 131.9 ft | 356 | 1955 |
| Great River Rd. over Turkey River | Poor | 339.9 ft | 314 | 1953 |
| Bush Rd. over Brush Creek | Poor | 127.0 ft | 275 | 1957 |
| Nature RD over Little Turkey River | Poor | 178.5 ft | 255 | 1960 |
| 2nd ST NE over Dry Run Creek | Poor | 30.8 ft | 224 | 1900 |
| W25 over Creek | Poor | 26.9 ft | 210 | 1968 |
| 242th St. over Unamed Creek | Poor | 63.0 ft | 148 | 1973 |
| Abbey Rd. over Beaver Creek | Poor | 52.2 ft | 128 | 1949 |
| Line ST over Drainage | Poor | 28.9 ft | 104 | 1910 |
| B Ave. over Bruce Creek | Poor | 57.4 ft | 88 | 1916 |
| 40th ST over Otter CR | Poor | 86.0 ft | 88 | 1917 |
| Echo Valley Rd. over Otter Creek | Poor | 83.0 ft | 88 | 1969 |
| Echo Valley RD over Unamed CR | Poor | 25.9 ft | 78 | 1964 |
| 80th ST over Volga River | Poor | 57.1 ft | 70 | 1953 |
| 80th St. over Unnamed CR | Poor | 29.9 ft | 70 | 1953 |
| X AVE over Unamed Creek | Poor | 27.9 ft | 70 | 1928 |
| 18th St. over Unnamed Creek | Poor | 34.1 ft | 69 | 1962 |
| 130th St. over Alexander Creek | Poor | 63.3 ft | 69 | 1950 |
| Quartz RD over Unnamed Creek | Poor | 22.0 ft | 59 | 1923 |
| Hamlet Rd. over Nutting CR | Poor | 50.9 ft | 59 | 1917 |
| J Ave. over Small Stream | Poor | 25.9 ft | 59 | 1980 |
| 147th St. over Unamed CR | Poor | 24.9 ft | 49 | 1917 |
| Eagle Rd. over Quinn CR | Poor | 86.9 ft | 49 | 1917 |
| 250th ST over Unnamed Creek | Poor | 68.9 ft | 49 | 1916 |
| V AVE over Stoe Creek | Poor | 80.1 ft | 44 | 1949 |
| 152th St. over The Coulee | Poor | 42.7 ft | 44 | 1924 |
| 170th ST over Coulee | Poor | 35.1 ft | 44 | 1915 |
| Jasper Rd. over Frog Hollow CR | Poor | 40.0 ft | 44 | 1958 |
| Granite Rd. over Nutting Creek | Poor | 49.9 ft | 44 | 1909 |
| P AVE over Unamed Creek | Poor | 33.1 ft | 44 | 1952 |
| J Ave. over Small | Poor | 21.0 ft | 44 | 1986 |
| 160th ST over L Wapsipinicon River | Poor | 125.0 ft | 43 | 1916 |
| 130th ST over Overflow L Volga R | Poor | 81.4 ft | 39 | 1916 |
| Dogwood Rd. over Mink CR | Poor | 53.1 ft | 39 | 1923 |
| B Ave. over Deep Creek | Poor | 56.1 ft | 39 | 2000 |
| 170th ST over Volga River | Poor | 58.1 ft | 39 | 1941 |
| 160th ST over Unamed Creek | Poor | 25.9 ft | 35 | 1970 |
| 20th St. over Hunter Creek | Poor | 47.9 ft | 34 | 1998 |
| 90th St. over Small Stream | Poor | 23.0 ft | 34 | 1990 |
| 160th ST over N Br Volga River | Poor | 85.6 ft | 34 | 1950 |
| 30th St. over Unamed CR | Poor | 25.9 ft | 33 | 1923 |
| J Ave. over E Br Buffalo CR | Poor | 75.1 ft | 33 | 1962 |
| 120th St. over Alexander CR | Poor | 24.0 ft | 33 | 1989 |
| Q AVE over Volga River | Poor | 76.1 ft | 33 | 1940 |
| X AVE over Unamed Creek | Poor | 24.0 ft | 33 | 1928 |
| 247th ST over Haugh Creek | Poor | 53.1 ft | 33 | 1920 |
| 200th ST over Volga River | Poor | 21.7 ft | 33 | 1914 |
| X AVE over Small | Poor | 25.9 ft | 33 | 1984 |
| F Ave. over Gundlach CR | Poor | 80.1 ft | 29 | 1921 |
| M Ave. over Volga River | Poor | 30.8 ft | 29 | 1939 |
| P Ave. over Volga River Br. | Poor | 63.0 ft | 29 | 1959 |
| 157th St. over Unnamed CR | Poor | 23.0 ft | 29 | 1998 |
| Grannis Rd. over Grannis CR | Poor | 67.9 ft | 29 | 1951 |
| 300th St. over Quinn Creek | Poor | 33.1 ft | 29 | 1997 |
| Otter Rd. over Creek | Poor | 71.9 ft | 29 | 1966 |
| 306th ST over Creek | Poor | 26.9 ft | 29 | 1988 |
| 306th ST over Small Dry Run | Poor | 24.9 ft | 29 | 1988 |
| U Ave. over Crane Creek | Poor | 102.0 ft | 29 | 1911 |
| W AVE over Dry Run Creek | Poor | 95.1 ft | 26 | 1996 |
| 50th ST over Small | Poor | 22.0 ft | 26 | 1984 |
| 20th St. over E Buffalo Creek | Poor | 62.0 ft | 25 | 1957 |
| 20th St. over Dry Run To E Buffalo CR | Poor | 30.8 ft | 20 | 1957 |
| R Ave. over Unamed CR | Poor | 53.1 ft | 20 | 1917 |
| 180th ST over Coulee | Poor | 24.9 ft | 20 | 1991 |
| 160th ST over Unnamed Creek | Poor | 23.0 ft | 20 | 1995 |
| Edge Rd. over Bell CR | Poor | 32.2 ft | 20 | 1954 |
| 240th ST over Haugh Creek | Poor | 29.9 ft | 20 | 1940 |
| Birch Rd. over Dibble Creek | Poor | 63.0 ft | 20 | 1917 |
| 300th ST over Nutting CR | Poor | 50.9 ft | 20 | 1917 |
| Jelly Rd. over Dry Br CR | Poor | 43.0 ft | 20 | 1917 |
| Rose Rd. over Otter CR | Poor | 60.0 ft | 15 | 1956 |
| 110th St. over Small Stream | Poor | 24.9 ft | 15 | 1988 |
| 110th St. over Unnamed Creek | Poor | 25.9 ft | 15 | 1988 |
| 78th ST over Unamed Creek | Poor | 49.9 ft | 15 | 1995 |
| 78th ST over Creek | Poor | 25.9 ft | 15 | 1988 |
| Fox Rd. over Volga River | Poor | 174.9 ft | 15 | 1905 |
| 185th ST over Volga River | Poor | 51.2 ft | 15 | 1957 |
| 170th Sty over Unnamed Creek | Poor | 40.0 ft | 15 | 1949 |
| 110th St. over Small | Poor | 23.0 ft | 15 | 1988 |
| 30th St. over Gundlach Creek | Poor | 76.8 ft | 11 | 1959 |
| 160th ST over Unamed Creek | Poor | 24.0 ft | 11 | 1920 |
| 175th ST over Volga River | Poor | 53.1 ft | 11 | 1955 |
| Entrance over Side Ditch Bridge | Poor | 26.9 ft | 10 | 1948 |
| Ia 150 over Otter Creek | Fair | 123.0 ft | 5,400 | 1979 |
| Ia 3 & 150 over Otter Creek | Fair | 43.3 ft | 3,930 | 1986 |
| Ia 150 over Unnamed Creek | Fair | 22.0 ft | 3,290 | 1928 |
| US 18 over Stream | Fair | 21.0 ft | 3,050 | 1963 |
| Ia 3 over Stream | Fair | 27.6 ft | 2,770 | 1988 |
| Ia 150 over Volga River | Fair | 353.0 ft | 2,700 | 1961 |
| Ia 150 over Alexander Creek | Fair | 32.2 ft | 2,660 | 1959 |
| Ia 3 & 150 over Stream | Fair | 123.0 ft | 2,580 | 1978 |
| Ia 3 & 150 over Otter Creek | Fair | 38.1 ft | 2,580 | 1955 |
| Ia 150 over Turkey River | Fair | 355.0 ft | 2,180 | 1969 |
| Ia 3 over Maquoketa River | Fair | 141.1 ft | 2,090 | 1959 |
| US 18 over Drainage Ditch | Fair | 54.1 ft | 1,880 | 1925 |
| Ia 3 over Little Wapsipinicon Rvr | Fair | 143.0 ft | 1,730 | 1959 |
| Ia 3 over Otter Creek | Fair | 83.0 ft | 1,730 | 1922 |
| Ia 187 over Bruce Creek | Fair | 40.0 ft | 1,560 | 1955 |
| Union ST over Small Stream | Fair | 47.9 ft | 1,518 | 1958 |
| Canoe RD over Turkey River | Fair | 324.5 ft | 1,483 | 1964 |
| Ia 150 over Stream | Fair | 37.1 ft | 1,460 | 1969 |
| Ia 150 over Stream | Fair | 103.0 ft | 1,460 | 1969 |
| Ia 150 over Stream | Fair | 35.1 ft | 1,460 | 1959 |
| Ia 150 over Stream | Fair | 44.9 ft | 1,460 | 1949 |
| Ia 93 over Stream | Fair | 29.9 ft | 1,440 | 1949 |
| Ia 3 over Stream | Fair | 28.9 ft | 1,400 | 1959 |
| Ia 3 over So Fork Maquoketa River | Fair | 82.0 ft | 1,400 | 1925 |
| Ia 3 over Drainage Ditch | Fair | 45.9 ft | 1,400 | 1959 |
| Ia 150 over Stream | Fair | 24.0 ft | 1,300 | 1959 |
| S Vine ST over Otter Creek | Fair | 65.9 ft | 1,042 | 1900 |
| 6th AVE SW over Dry Run Creek | Fair | 44.9 ft | 1,009 | 1976 |
| Y AVE over Creek | Fair | 32.2 ft | 962 | 1965 |
| Cedar Rd. over Otter Creek | Fair | 113.8 ft | 939 | 1964 |
| Golden Rd. over Unnamed CR | Fair | 21.0 ft | 913 | 1932 |
| 4th ST SW over Dry Run Creek | Fair | 27.9 ft | 907 | 1974 |
| W AVE over Small Stream | Fair | 33.1 ft | 795 | 1987 |
| Ia 93 over Coulee Creek | Fair | 143.0 ft | 790 | 1989 |
| Ia 93 over Volga River | Fair | 290.0 ft | 790 | 1989 |
| W AVE over Stoe Creek | Fair | 74.1 ft | 766 | 1963 |
| 2nd AVE SW over Dry Run Creek | Fair | 24.0 ft | 750 | 1900 |
| Ia 187 over Brush Creek | Fair | 127.0 ft | 700 | 1936 |
| W AVE over Crane Creek | Fair | 276.9 ft | 668 | 1954 |
| W AVE over Dry Run Creek | Fair | 128.0 ft | 668 | 1954 |
| N Main ST over Drainage | Fair | 28.9 ft | 599 | 1998 |
| Ia 56 over Otter Creek | Fair | 37.1 ft | 590 | 1951 |
| W.charles ST over Otter Creek | Fair | 184.1 ft | 571 | 1950 |
| Y AVE over Little Wapsi River | Fair | 179.1 ft | 570 | 1970 |
| G Ave. over Gundlach Creek | Fair | 126.6 ft | 520 | 1963 |
| W14 over Volga River | Fair | 78.1 ft | 491 | 1956 |
| Neon Rd. over Volga River | Fair | 102.4 ft | 471 | 1961 |
| W25 over Volga River | Fair | 183.1 ft | 471 | 1950 |
| C14 over Creek | Fair | 22.0 ft | 432 | 1926 |
| C14 over Coulee Creek | Fair | 26.9 ft | 432 | 1925 |
| Rose RD over Creek | Fair | 39.0 ft | 432 | 1963 |
| White Tail RD over Dry Run | Fair | 75.1 ft | 432 | 1970 |
| S Pine ST over Otter Creek | Fair | 120.1 ft | 397 | 1979 |
| Echo Valley Rd. over Otter Creek | Fair | 70.9 ft | 363 | 1971 |
| 100th ST over Stoe Creek | Fair | 103.0 ft | 344 | 1971 |
| 40th ST over Unnamed Creek | Fair | 24.0 ft | 314 | 1925 |
| Great River Rd. over Turkey River | Fair | 327.4 ft | 314 | 1978 |
| Town RD over Drainage Ditch | Fair | 25.9 ft | 310 | 1958 |
| Great River Rd. over Turkey River | Fair | 292.7 ft | 177 | 1979 |
| Willow Rd. over Unnamed Creek | Fair | 74.1 ft | 167 | 1929 |
| 210th ST over Volga River North Branch | Fair | 30.8 ft | 157 | 1997 |
| M Ave. over Coulee Creek | Fair | 86.9 ft | 97 | 1949 |
| C Ave. over Small | Fair | 27.9 ft | 88 | 1988 |
| T AVE over Unnamed CR | Fair | 23.0 ft | 79 | 1988 |
| 50th St. over Unamed Creek | Fair | 24.0 ft | 78 | 2002 |
| 40th St. over Unnamed Creek | Fair | 24.0 ft | 78 | 1987 |
| 30th St. over Hunter Creek | Fair | 36.1 ft | 78 | 1996 |
| Echo Valley Rd. over Unamed Creek | Fair | 39.0 ft | 78 | 1990 |
| Echo Valley Rd. over Otter CR | Fair | 80.1 ft | 78 | 1974 |
| 290th ST over Small Stream | Fair | 22.6 ft | 78 | 2020 |
| 110th St. over Little Volga R | Fair | 105.0 ft | 70 | 1969 |
| N Ave. over Unamed CR | Fair | 29.9 ft | 70 | 1928 |
| T AVE over Volga River | Fair | 42.0 ft | 70 | 1928 |
| 20th ST over Small Stream | Fair | 24.0 ft | 69 | 1990 |
| D Ave. over Dry Run To Bruce Creek | Fair | 25.9 ft | 59 | 1929 |
| R Ave. over Unnamed Creek | Fair | 48.9 ft | 59 | 1994 |
| 30th ST over Unamed CR | Fair | 34.1 ft | 59 | 1998 |
| Eagle Rd. over Fitzgerald CR | Fair | 43.0 ft | 59 | 1922 |
| S AVE over Creek | Fair | 33.1 ft | 59 | 1998 |
| Sunset RD over Little Turkey River | Fair | 253.6 ft | 59 | 1954 |
| S AVE over Small Stream | Fair | 33.1 ft | 59 | 1998 |
| D Ave. over Maquoketa River | Fair | 38.1 ft | 49 | 1952 |
| J AVE over Small | Fair | 26.9 ft | 49 | 1988 |
| 120th ST over Unnamed Creek | Fair | 28.9 ft | 49 | 1991 |
| 140th ST over Unamed Creek | Fair | 33.1 ft | 49 | 1998 |
| X AVE over Unamed Creek | Fair | 37.1 ft | 49 | 2003 |
| 247th ST over Dry Run To Crane Creek | Fair | 44.0 ft | 49 | 1998 |
| Spruce RD over Little Turkey River | Fair | 138.1 ft | 49 | 1964 |
| Maple RD over Small Stream | Fair | 25.9 ft | 49 | 1997 |
| Fox Rd. over Unnamed Creek | Fair | 22.0 ft | 44 | 1990 |
| Acorn Rd. over Mink CR | Fair | 52.2 ft | 44 | 1970 |
| 200th ST over Unamed Creek | Fair | 32.2 ft | 44 | 1997 |
| 275th St. over Unamed CR | Fair | 30.8 ft | 44 | 1996 |
| Major RD over Unnamed Creek | Fair | 32.2 ft | 44 | 1998 |
| I AVE over Small Stream | Fair | 22.0 ft | 44 | 2022 |
| 130th St. over Stream | Fair | 25.9 ft | 39 | 1950 |
| 180th ST over Unnamed Creek | Fair | 32.2 ft | 39 | 1994 |
| 180th ST over Unnamed Creek | Fair | 29.9 ft | 39 | 1995 |
| 80th St. over Brush Creek | Fair | 26.9 ft | 34 | 1929 |
| FM over Creek | Fair | 28.9 ft | 34 | 1995 |
| 70th ST over Unnamed Creek | Fair | 43.0 ft | 33 | 1995 |
| 90th St. over Otter Creek | Fair | 29.9 ft | 33 | 1995 |
| 110th ST over Unamed Creek | Fair | 33.1 ft | 33 | 1997 |
| Bear Rd. over Mink Creek | Fair | 58.1 ft | 33 | 1917 |
| 306th St. over Dibble CR | Fair | 62.0 ft | 33 | 1971 |
| 300th ST over Dry Run Creek | Fair | 42.0 ft | 33 | 1990 |
| Basswood RD over Quinn Creek | Fair | 21.0 ft | 33 | 1985 |
| Bear RD over Mink Creek | Fair | 24.0 ft | 33 | 2002 |
| Grannis Rd. over Grannis Creek | Fair | 39.0 ft | 29 | 1985 |
| 160th ST over Volga River | Fair | 40.0 ft | 29 | 1928 |
| Hornet Rd. over Unamed CR | Fair | 23.0 ft | 29 | 1989 |
| Q AVE over N Br Volga River | Fair | 35.1 ft | 29 | 1998 |
| Otter RD over Small Stream | Fair | 23.0 ft | 29 | 1990 |
| Xray RD over Small Stream | Fair | 21.0 ft | 29 | 2000 |
| New Donnan RD over The Coulee | Fair | 26.9 ft | 26 | 1925 |
| Q Ave. over Unnamed CR | Fair | 23.0 ft | 26 | 1951 |
| S AVE over Unamed Creek | Fair | 21.0 ft | 26 | 1926 |
| V AVE over Unamed Creek | Fair | 27.9 ft | 26 | 1997 |
| Unicorn RD over Unamed Creek | Fair | 38.1 ft | 26 | 2003 |
| K Ave. over Stream | Fair | 44.0 ft | 25 | 1928 |
| Birch Rd. over Creek | Fair | 32.2 ft | 25 | 1998 |
| Ironwood Rd. over Turkey River | Fair | 274.0 ft | 25 | 1965 |
| V AVE over Unamed Creek | Fair | 22.0 ft | 20 | 2008 |
| Grain Rd. over Unamed CR | Fair | 30.8 ft | 20 | 1998 |
| 180th ST over Unamed Creek | Fair | 29.9 ft | 20 | 1998 |
| Edge RD over Unamed Creek | Fair | 69.9 ft | 20 | 2020 |
| Dove Rd. over Otter Creek | Fair | 60.0 ft | 20 | 1972 |
| Unicorn RD over Small Stream | Fair | 27.9 ft | 20 | 2001 |
| 170th ST over Volga River | Fair | 43.0 ft | 15 | 1928 |
| Diamond Rd. over Bell CR | Fair | 83.0 ft | 15 | 1960 |
| F Ave. over Bell Creek | Fair | 43.0 ft | 15 | 1916 |
| Q AVE over Unamed Creek | Fair | 30.8 ft | 15 | 1926 |
| 240th ST over Unamed Creek | Fair | 37.1 ft | 15 | 2000 |
| Nest RD over Unamed Creek | Fair | 21.0 ft | 15 | 1998 |
| 200th Street over Coulee Creek | Fair | 26.9 ft | 15 | 2021 |
| Y AVE over Small Stream | Fair | 38.1 ft | 11 | 1989 |
| Xavier RD over Unnamed Creek | Fair | 23.0 ft | 11 | 2021 |
| Dogwood RD over Brush Creek | Fair | 40.0 ft | 10 | 2021 |
| 25th St. over Hunter CR | Fair | 34.1 ft | 5 | 1999 |
| Pk 678(volga R) over Frog Hollow Creek | Fair | 77.1 ft | 0 | 1957 |
| Ia 150 over Stream | Good | 24.0 ft | 3,290 | 1969 |
| US 18 over Glover Creek | Good | 29.9 ft | 3,110 | 1976 |
| US 18 over Turkey River | Good | 290.0 ft | 2,750 | 1988 |
| Ia 150 over Over Aband Rr | Good | 65.9 ft | 2,700 | 1961 |
| Ia 3 over Stream | Good | 35.1 ft | 2,350 | 1961 |
| US 18 over Haugh Creek | Good | 82.0 ft | 2,250 | 2016 |
| Ia 93 over Little Wapsipinicon Rvr | Good | 174.9 ft | 1,760 | 1989 |
| K Ave. over Unnamed CR To Volga CR | Good | 22.0 ft | 1,719 | 1989 |
| K Ave. over Little Volga | Good | 25.9 ft | 1,719 | 1998 |
| Outer Rd. over Over Abandon Rr | Good | 118.1 ft | 1,561 | 1973 |
| Ia 187 over Maquoketa River | Good | 129.9 ft | 1,540 | 2011 |
| Ia 150 over Little Volga River | Good | 177.2 ft | 1,390 | 1992 |
| W AVE over Unamed Creek | Good | 22.0 ft | 884 | 2004 |
| 6th AVE SW over Otter Creek | Good | 178.1 ft | 850 | 1978 |
| W AVE over Unnamed Creek | Good | 33.1 ft | 795 | 1969 |
| Ia 93 over Volga River | Good | 113.8 ft | 790 | 1989 |
| Ia 93 over N.br.volga River | Good | 138.1 ft | 790 | 1989 |
| Ia 93 over Br Volga River | Good | 32.2 ft | 790 | 1989 |
| Ia 93 over Volga River Overflow | Good | 125.0 ft | 790 | 1989 |
| W AVE over Unnamed Creek | Good | 40.0 ft | 786 | 1977 |
| W AVE over Creek | Good | 23.0 ft | 766 | 1981 |
| East ST over Brush Creek | Good | 29.9 ft | 739 | 1975 |
| W AVE over Haugh Creek | Good | 22.0 ft | 737 | 2005 |
| Main St. over Volga River | Good | 228.0 ft | 729 | 1988 |
| Rose RD over Small Stream | Good | 29.9 ft | 707 | 1984 |
| Vine RD over Small Natural Stream | Good | 98.4 ft | 638 | 1989 |
| Agate RD over Turkey River Over Flow | Good | 44.0 ft | 599 | 1996 |
| W14 R AVE over Volga River | Good | 113.2 ft | 501 | 2021 |
| R AVE over Br Volga River | Good | 40.0 ft | 471 | 2007 |
| 220th ST over Small Stream | Good | 25.9 ft | 440 | 2016 |
| Rose RD over Little Turkey River | Good | 254.6 ft | 432 | 1976 |
| W-14 over Unnamed Creek | Good | 45.9 ft | 410 | 1979 |
| Apple RD over Sandy Creek | Good | 79.1 ft | 410 | 1975 |
| Juniper RD over Turkey River | Good | 435.0 ft | 403 | 2009 |
| Echo Valley Rd. over Otter Creek | Good | 40.0 ft | 363 | 1971 |
| 100th ST over Little Wapsi River | Good | 144.0 ft | 344 | 1968 |
| Mill ST over Otter Creek | Good | 123.0 ft | 337 | 2011 |
| Great River Rd. over Turkey River | Good | 293.3 ft | 314 | 1987 |
| 210th St. over Unamed CR | Good | 34.4 ft | 304 | 1988 |
| 3rd ST SE over Unnamed Creek | Good | 37.7 ft | 232 | 2008 |
| Great River Rd. over Turkey River | Good | 288.1 ft | 226 | 1982 |
| 90th ST over Brush Creek | Good | 38.1 ft | 216 | 1993 |
| G Ave. over Bear Creek | Good | 40.0 ft | 206 | 1980 |
| Jade Road over Unnamed Creek | Good | 22.0 ft | 200 | 1988 |
| W55 Acorn RD over Beaver Creek | Good | 24.9 ft | 177 | 2022 |
| Local Co RD Ext over Unnamed Creek | Good | 40.0 ft | 176 | 1985 |
| Quail RD over Bass Creek | Good | 26.9 ft | 140 | 1955 |
| Linden ST over Otter Creek | Good | 87.9 ft | 131 | 1993 |
| Stone St. over Dibble Creek | Good | 111.9 ft | 130 | 2004 |
| W AVE over Crane Creek | Good | 216.9 ft | 128 | 1989 |
| C50 (40th St) over Unnamed Creek | Good | 24.6 ft | 108 | 2012 |
| 40th ST over Little Wapsi River | Good | 179.5 ft | 108 | 1997 |
| Pheasant RD over Bass Creek | Good | 24.9 ft | 88 | 2008 |
| T AVE over Trib To Volga River | Good | 20.0 ft | 78 | 2015 |
| 30th ST over Little Wapsi River | Good | 179.5 ft | 70 | 1991 |
| 30th ST over Unamed CR | Good | 30.8 ft | 70 | 2004 |
| L AVE over Volga River | Good | 93.2 ft | 70 | 2021 |
| N AVE over Little Volga River | Good | 40.0 ft | 70 | 2000 |
| FM over Crane Creek | Good | 221.1 ft | 69 | 1980 |
| Main ST over Brush Creek | Good | 103.0 ft | 62 | 2019 |
| 50th St. over Maquoketa | Good | 40.0 ft | 59 | 1976 |
| 50th St. over Unamed CR | Good | 43.0 ft | 59 | 1985 |
| 50th St. over Otter Creek | Good | 50.9 ft | 59 | 2008 |
| 50th ST over Little Wapsi River | Good | 179.5 ft | 59 | 2000 |
| 20th ST over Little Wapsi River | Good | 204.4 ft | 59 | 2006 |
| Beechnut RD over Unamed CR | Good | 27.2 ft | 59 | 2004 |
| Beechnut RD over Dibble CR | Good | 39.0 ft | 59 | 2009 |
| M AVE over Small | Good | 24.0 ft | 59 | 2018 |
| 20th ST over Principal | Good | 69.9 ft | 49 | 2016 |
| 80th ST over Otter Creek | Good | 39.0 ft | 49 | 2011 |
| 80th St. over Volga River | Good | 45.9 ft | 49 | 1983 |
| 80th ST over Small Creek | Good | 45.9 ft | 49 | 2019 |
| S AVE over Volga River | Good | 109.9 ft | 49 | 2016 |
| Pheasant RD over Bass Creek | Good | 53.8 ft | 49 | 1950 |
| Maple RD over Little Turkey River | Good | 246.1 ft | 49 | 1986 |
| Maple RD over Creek | Good | 24.9 ft | 49 | 2023 |
| M Ave. over Volga River | Good | 175.9 ft | 44 | 1992 |
| 200th ST over N Br Volga River | Good | 39.0 ft | 44 | 2006 |
| Crystal Rd. over Dibble CR | Good | 39.0 ft | 44 | 2012 |
| Pheasant RD over Turkey River | Good | 229.3 ft | 44 | 2004 |
| Willow RD over Little Turkey River | Good | 179.5 ft | 44 | 1999 |
| 306th ST over Little Turkey River | Good | 167.0 ft | 44 | 1989 |
| 275th ST over Littlle Turkey River | Good | 178.8 ft | 44 | 1974 |
| 30th ST over E Buffalo CR | Good | 83.3 ft | 39 | 2018 |
| 18th St. over W Buffalo Creek | Good | 90.6 ft | 39 | 1977 |
| Acorn RD over Volga River | Good | 171.9 ft | 39 | 2019 |
| 190th ST over Volga River | Good | 73.2 ft | 39 | 2023 |
| 180th ST over N Br Volga River | Good | 83.0 ft | 39 | 2018 |
| Orange RD over Turkey River | Good | 243.1 ft | 39 | 2005 |
| 280th ST over Dry Run Creek | Good | 70.5 ft | 39 | 2019 |
| 250th ST over Small Stream | Good | 24.9 ft | 39 | 1999 |
| 20th St. over Gundlach Creek | Good | 52.2 ft | 34 | 1985 |
| Heron Rd. over Volga River | Good | 216.9 ft | 34 | 1979 |
| 50th St. over Gundlach CR | Good | 76.8 ft | 33 | 1963 |
| 70th ST over Otter CR | Good | 77.1 ft | 33 | 1963 |
| U AVE over Stoe Creek | Good | 44.9 ft | 33 | 2007 |
| Q AVE over Unnamed Creek | Good | 49.9 ft | 33 | 2020 |
| I Ave. over Small Stream | Good | 24.0 ft | 33 | 1990 |
| A AVE over Sandy Creek | Good | 21.0 ft | 33 | 2021 |
| M Ave. over Volga River | Good | 26.9 ft | 29 | 1977 |
| Grannis RD over Grannis CR | Good | 40.0 ft | 29 | 2001 |
| N AVE over Creek | Good | 24.9 ft | 29 | 2010 |
| N AVE over Volga River | Good | 152.9 ft | 29 | 2010 |
| 245th ST over Creek | Good | 73.2 ft | 29 | 2018 |
| Local over Little Turkey River | Good | 246.1 ft | 29 | 1996 |
| Otter RD over Little Turkey River | Good | 204.4 ft | 29 | 1991 |
| Nickle RD over Unamed Creek | Good | 24.9 ft | 26 | 2008 |
| H AVE over Gundlach Creek | Good | 80.1 ft | 20 | 2023 |
| Outer RD over Unnamed Creek | Good | 24.9 ft | 20 | 2017 |
| 120th ST over Stoe Creek | Good | 44.9 ft | 20 | 2007 |
| Depot RD over Unnamed Creek | Good | 22.6 ft | 20 | 2021 |
| Y AVE over Small Stream | Good | 24.9 ft | 20 | 2022 |
| Spruce RD over Crane Creek | Good | 204.4 ft | 20 | 2002 |
| Hill Road over Unnamed Creek | Good | 21.0 ft | 20 | 2021 |
| 120th St. over Little Volga R | Good | 115.5 ft | 15 | 1996 |
| V Avenue over Unamed Creek | Good | 24.9 ft | 15 | 2006 |
| 78th ST over Little Wapsi River | Good | 204.4 ft | 15 | 2006 |
| Big Horn Rd. over Mink CR | Good | 101.0 ft | 15 | 2000 |
| Hornet RD over Otter Creek | Good | 116.1 ft | 15 | 1991 |
| 95th ST over Small Stream | Good | 22.0 ft | 11 | 2021 |
| 115th St. over Unnamed CR | Good | 23.0 ft | 11 | 1951 |
| Willow RD over Unnamed Creek | Good | 26.6 ft | 11 | 2021 |
| B60 Apple RD (sdb) over Road Creek | Good | 21.0 ft | 10 | 2014 |
| Frederick AVE over Dry Run Creek | Good | 41.0 ft | 0 | 1988 |
| Pk 678(volga R) over Frog Hollow Creek | Good | 134.8 ft | 0 | 1984 |