| FM over Willow Creek | Poor | 44.0 ft | 279 | 1964 |
| Local over Ginger Creek | Poor | 32.2 ft | 62 | 1952 |
| Local over Mill Creek | Poor | 102.0 ft | 50 | 1924 |
| Local over Grass Waterway | Poor | 23.0 ft | 50 | 1954 |
| Local over Lamkin Creek | Poor | 38.1 ft | 35 | 1945 |
| FM over Waterman Creek | Poor | 32.2 ft | 34 | 2003 |
| Local Sec RD over Willow CR | Poor | 21.0 ft | 26 | 1919 |
| Local Sec RD over Willow Creek | Poor | 86.0 ft | 26 | 1935 |
| Local over W Br Mill Creek | Poor | 30.8 ft | 26 | 1925 |
| Local over Floyd River | Poor | 127.0 ft | 26 | 1900 |
| Local over Barry Creek | Poor | 23.0 ft | 21 | 1938 |
| Local Sec RD over Ginger CR | Poor | 41.0 ft | 15 | 1900 |
| Local over Mill Creek | Poor | 81.0 ft | 15 | 1935 |
| Local over Willow Creek | Poor | 28.9 ft | 11 | 1900 |
| Sec RD over Jordan Creek | Poor | 33.1 ft | 0 | 1916 |
| Sec RD over Waterman CR | Poor | 77.1 ft | 0 | 1915 |
| US 18 over Branch Little Floyd Rvr | Fair | 22.0 ft | 4,530 | 1958 |
| US 18 over Drainage Ditch | Fair | 25.9 ft | 4,530 | 1958 |
| US 18 over Little Floyd River | Fair | 122.0 ft | 4,230 | 1957 |
| US 18 over Stream | Fair | 24.9 ft | 3,640 | 1959 |
| US 18 over Stream | Fair | 26.6 ft | 3,530 | 1958 |
| US 18 over Drainage Ditch | Fair | 39.4 ft | 3,210 | 1957 |
| US 59 & Ia 10 over Willow Creek | Fair | 38.1 ft | 1,460 | 1971 |
| Northwest BLVD over Floyd River | Fair | 212.9 ft | 1,296 | 1982 |
| FM over Stofferan Creek | Fair | 36.1 ft | 1,277 | 1976 |
| US 59 over Mill Creek | Fair | 36.1 ft | 1,170 | 1973 |
| US 59 over Dry Run | Fair | 128.0 ft | 1,170 | 1973 |
| US 59 over Branch Floyd River | Fair | 92.8 ft | 1,170 | 1976 |
| Ia 10 over Dry Run | Fair | 103.0 ft | 1,130 | 1969 |
| FM over Mill Creek Branch | Fair | 44.9 ft | 1,087 | 1959 |
| FM over W Branch Mill Creek | Fair | 33.1 ft | 1,087 | 1959 |
| FM over Mill Creek | Fair | 115.2 ft | 1,087 | 1984 |
| FM over Waterman Creek | Fair | 122.0 ft | 1,057 | 1937 |
| FM over Stofferan Creek | Fair | 22.0 ft | 968 | 1971 |
| FM over Jordan Creek | Fair | 22.0 ft | 948 | 1969 |
| FM over Dry Run | Fair | 103.0 ft | 917 | 1961 |
| FM over Mill Creek | Fair | 152.9 ft | 917 | 1961 |
| FM over Small Un-named Creek | Fair | 25.9 ft | 917 | 1992 |
| FM over Mud Creek | Fair | 30.8 ft | 878 | 2002 |
| FM over Willow Creek | Fair | 32.2 ft | 828 | 1972 |
| FM over Mccreath Creek | Fair | 28.9 ft | 797 | 1953 |
| FM over Little Floyd River | Fair | 128.0 ft | 609 | 1963 |
| FM over Mill Creek | Fair | 151.9 ft | 538 | 1979 |
| FM over Floyd River | Fair | 177.2 ft | 518 | 1962 |
| FM over Small Un-named Creek | Fair | 22.0 ft | 509 | 1969 |
| FM over Wolf Creek | Fair | 29.9 ft | 469 | 1966 |
| FM over Little Floyd River | Fair | 78.1 ft | 409 | 1968 |
| Oriole AVE over Grass Waterway | Fair | 24.9 ft | 409 | 1965 |
| FM over Waterman Creek | Fair | 37.1 ft | 309 | 1977 |
| FM over Little Waterman Creek | Fair | 24.3 ft | 300 | 1955 |
| FM over Willow Creek | Fair | 128.0 ft | 259 | 2003 |
| FM over Floyd River | Fair | 174.9 ft | 240 | 1962 |
| FM over Waterman Creek | Fair | 178.1 ft | 210 | 1961 |
| FM over Mud Creek | Fair | 43.0 ft | 210 | 1900 |
| FM over Engels Creek | Fair | 25.9 ft | 199 | 1925 |
| FM over Ginger Creek | Fair | 30.8 ft | 180 | 1928 |
| FM over Whiskey Creek | Fair | 35.1 ft | 159 | 1990 |
| Local Sec RD over Mud Creek | Fair | 35.1 ft | 103 | 1934 |
| Local over Mud Creek | Fair | 65.9 ft | 72 | 1950 |
| FM over Mill Creek | Fair | 152.9 ft | 71 | 1970 |
| FM over Mud Creek | Fair | 103.0 ft | 71 | 1968 |
| FM over No Folk Floyd River | Fair | 35.1 ft | 71 | 1994 |
| Local over Small Un-named Creek | Fair | 24.9 ft | 62 | 1974 |
| Local over Lange Creek | Fair | 58.1 ft | 62 | 1954 |
| Local Sec RD over Lange Creek | Fair | 36.1 ft | 62 | 1954 |
| Local Sec RD over Mill Creek | Fair | 85.0 ft | 62 | 1940 |
| FM over Drainage Way | Fair | 43.0 ft | 60 | 1946 |
| FM over Small Un-named Creek | Fair | 23.0 ft | 50 | 1939 |
| Local over Dry Run | Fair | 44.9 ft | 50 | 1947 |
| Local Sec RD over Mud Creek | Fair | 50.9 ft | 50 | 1939 |
| Local Sec RD over Mud Creek | Fair | 50.9 ft | 50 | 1939 |
| Local over Sweeney Creek | Fair | 68.9 ft | 50 | 2013 |
| FM over Little Floyd River | Fair | 125.0 ft | 50 | 1968 |
| Local RD over Little Floyd River | Fair | 41.0 ft | 50 | 1959 |
| Local over Mill Creek | Fair | 152.9 ft | 46 | 1970 |
| 330th ST over Little Floyd River | Fair | 68.9 ft | 46 | 2011 |
| Local over Little Floyd River | Fair | 103.0 ft | 46 | 1975 |
| FM over Henry Creek | Fair | 63.0 ft | 45 | 1950 |
| FM over Floyd River | Fair | 78.1 ft | 45 | 1969 |
| Local over Waterman Creek | Fair | 183.1 ft | 41 | 1950 |
| Local Sec RD over Willow CR | Fair | 35.1 ft | 41 | 2001 |
| Local Sec RD over Nelson Creek | Fair | 43.0 ft | 41 | 1941 |
| Local Sec RD over Barry Creek | Fair | 53.1 ft | 41 | 1900 |
| Local over Barry Creek | Fair | 25.9 ft | 41 | 1980 |
| Local over Mccreath Creek | Fair | 21.0 ft | 41 | 1980 |
| Local over Mill Creek | Fair | 43.0 ft | 41 | 1939 |
| Local over Small Un-named Creek | Fair | 25.9 ft | 35 | 1973 |
| Local over Mill Creek | Fair | 81.0 ft | 35 | 1924 |
| Local Sec RD over Waterman Creek | Fair | 43.0 ft | 35 | 1955 |
| Local over Floyd River | Fair | 177.2 ft | 35 | 1954 |
| FM over Whiskey Creek | Fair | 42.0 ft | 34 | 1927 |
| FM over Small Un-named Creek | Fair | 42.0 ft | 34 | 1935 |
| Local Sec RD over Nelson CR | Fair | 43.0 ft | 30 | 1935 |
| Local over Lake Creek | Fair | 35.1 ft | 30 | 2006 |
| Local over Sewer Creek | Fair | 46.9 ft | 30 | 1983 |
| Local over Little Waterman Creek | Fair | 57.1 ft | 30 | 1952 |
| Local over Waterman Creek | Fair | 122.0 ft | 30 | 1952 |
| Local over Waterman Creek | Fair | 151.9 ft | 30 | 1952 |
| Local over Little Waterman Creek | Fair | 35.1 ft | 30 | 1940 |
| Local over So Br Little Floyd River | Fair | 23.0 ft | 30 | 1937 |
| Local over W Br Mill Creek | Fair | 38.1 ft | 30 | 1947 |
| Local over Ocheyedan River | Fair | 183.1 ft | 30 | 1933 |
| FM over Small Un-named Creek | Fair | 34.1 ft | 30 | 1996 |
| FM over Waterman Creek | Fair | 26.9 ft | 30 | 2004 |
| Local Sec RD over Lange Creek North | Fair | 35.1 ft | 26 | 1998 |
| Local Sec RD over Waterman Creek | Fair | 152.9 ft | 26 | 1951 |
| Local over Lake Creek | Fair | 30.8 ft | 26 | 1979 |
| Local Sec RD over Dry Run | Fair | 68.9 ft | 26 | 1935 |
| Local Sec RD over Stofferan Creek | Fair | 67.3 ft | 26 | 2010 |
| Local Sec RD over Grass Waterway | Fair | 20.0 ft | 26 | 1900 |
| Local Sec RD over Roetzel Creek | Fair | 33.1 ft | 26 | 1925 |
| Local over Waterman Creek | Fair | 122.0 ft | 26 | 1933 |
| Oak Hill AVE over Little Floyd River | Fair | 152.2 ft | 26 | 2020 |
| Local over Floyd River | Fair | 123.0 ft | 26 | 1939 |
| 290th ST over Floyd River | Fair | 68.9 ft | 26 | 2018 |
| Local over Floyd River Overflow | Fair | 41.0 ft | 26 | 1933 |
| Local over Wolf Creek | Fair | 35.1 ft | 26 | 1900 |
| Local over W Br Whiskey Creek | Fair | 30.8 ft | 21 | 1978 |
| Local over Lake Creek | Fair | 35.1 ft | 21 | 1992 |
| 410th ST over Johnson Creek | Fair | 67.9 ft | 21 | 2019 |
| Local over Mill Creek | Fair | 104.0 ft | 21 | 1989 |
| Redwing AVE over Floyd River | Fair | 69.9 ft | 21 | 2005 |
| Local over Engels Creek | Fair | 32.2 ft | 21 | 1932 |
| FM over Ocheyedan River Overflow | Fair | 104.0 ft | 20 | 1951 |
| Local Sec RD over Murray CR | Fair | 62.0 ft | 15 | 1900 |
| Local over Nelson CR | Fair | 52.2 ft | 15 | 1938 |
| FM over Deep Creek | Fair | 35.1 ft | 15 | 1934 |
| Local Sec RD over Mccreath CR | Fair | 42.0 ft | 15 | 1940 |
| Local Sec RD over Roetzel Creek | Fair | 43.0 ft | 15 | 1950 |
| Local over Little Waterman CR | Fair | 33.1 ft | 15 | 1925 |
| Local over W Br Mill Creek | Fair | 30.8 ft | 15 | 1928 |
| Local over Floyd River | Fair | 68.9 ft | 15 | 2009 |
| Pierce AVE over W Br Mill Creek | Fair | 24.0 ft | 15 | 1966 |
| Local over Willow CR | Fair | 78.1 ft | 11 | 1978 |
| Monroe AVE over Deep Creek | Fair | 45.9 ft | 11 | 2007 |
| Ia 60 over Engels Creek | Good | 43.0 ft | 5,300 | 2006 |
| US 18 over Waterman Creek | Good | 204.4 ft | 3,530 | 2020 |
| Ia 60 SB over Floyd River | Good | 307.1 ft | 2,650 | 2004 |
| Ia 60 NB over Floyd River | Good | 303.1 ft | 2,650 | 2004 |
| Ia 60 SB over Dme Rr | Good | 291.0 ft | 2,600 | 2005 |
| Ia 60 NB over Dme Rr | Good | 291.0 ft | 2,600 | 2005 |
| Ia 10 over Mud Creek | Good | 123.0 ft | 1,770 | 2023 |
| Ia 60 SB over US 18 | Good | 252.0 ft | 1,735 | 2004 |
| Ia 60 NB over U.s. 18 | Good | 252.0 ft | 1,735 | 2004 |
| US 59 & Ia 10 over Nelson Creek | Good | 33.1 ft | 1,460 | 1991 |
| US 59 over Mill Creek | Good | 25.9 ft | 1,420 | 1973 |
| FM over Little Floyd River | Good | 153.9 ft | 1,337 | 1987 |
| FM over Lamkin Creek | Good | 38.1 ft | 1,337 | 1976 |
| US 59 over Dry Run | Good | 128.0 ft | 1,170 | 1973 |
| FM over Dry Run | Good | 28.9 ft | 1,168 | 1998 |
| Ia 10 over Mill Creek | Good | 146.0 ft | 1,130 | 1969 |
| FM over Little Waterman Creek | Good | 103.0 ft | 1,117 | 1969 |
| FM over Murray Creek | Good | 22.0 ft | 880 | 1987 |
| FM over Willow Creek | Good | 24.9 ft | 878 | 1955 |
| FM over Mill Creek | Good | 165.0 ft | 828 | 2000 |
| Fas Major B-40 over Roetzel Creek | Good | 22.0 ft | 828 | 2006 |
| FM over Waterman Creek | Good | 152.9 ft | 797 | 1953 |
| 330th Street over Ia 60 | Good | 274.9 ft | 619 | 2005 |
| FM over Willow Creek | Good | 128.0 ft | 609 | 1987 |
| Ia 10 over Little Sioux River | Good | 390.1 ft | 590 | 1989 |
| FM over Floyd River | Good | 180.1 ft | 530 | 1989 |
| Monroe AVE over Floyd River Overflow | Good | 83.0 ft | 518 | 2020 |
| FM over Small Un-named Creek | Good | 21.0 ft | 509 | 1988 |
| FM over Floyd River | Good | 134.8 ft | 489 | 1986 |
| FM over Little Floyd River | Good | 90.9 ft | 489 | 1992 |
| FM over Willow Creek | Good | 33.1 ft | 478 | 2010 |
| FM over So Br Little Floyd River | Good | 32.2 ft | 459 | 2009 |
| FM over Mill Creek | Good | 103.0 ft | 459 | 1971 |
| FM over Waterman Creek | Good | 103.0 ft | 409 | 1963 |
| FM over Unnamed Stream | Good | 32.2 ft | 409 | 1980 |
| Oriole AVE over So Br Little Floyd River | Good | 116.1 ft | 409 | 1989 |
| FM over Waterman Creek | Good | 22.0 ft | 309 | 1965 |
| FM over Plessis Creek | Good | 36.1 ft | 309 | 1964 |
| Nest Avenue over Ia 60 | Good | 285.1 ft | 259 | 2004 |
| FM over Small Un-named Creek | Good | 21.0 ft | 240 | 1998 |
| Oriole AVE over Johnson Creek | Good | 24.9 ft | 210 | 2015 |
| FM over Floyd River | Good | 179.1 ft | 199 | 2004 |
| FM over Mill Creek | Good | 190.9 ft | 159 | 2008 |
| Monroe AVE over Ia 60 | Good | 234.9 ft | 100 | 2005 |
| 350th ST over Waterman Creek | Good | 132.9 ft | 72 | 2017 |
| Local over Waterman Creek | Good | 103.0 ft | 72 | 1983 |
| Local over Epping Creek | Good | 37.1 ft | 72 | 1985 |
| 420th ST over Barry Creek | Good | 68.9 ft | 71 | 2011 |
| FM over Floyd River | Good | 103.0 ft | 71 | 2001 |
| Local over Small Un-named Creek | Good | 30.8 ft | 62 | 1978 |
| Local over Waterman Creek | Good | 128.0 ft | 62 | 1982 |
| 330th ST over Small Un-named Creek | Good | 35.1 ft | 62 | 2004 |
| FM over Dry Run | Good | 90.9 ft | 60 | 2001 |
| Local RD over Nelson Creek | Good | 21.0 ft | 50 | 1990 |
| FM over Johnson Creek | Good | 24.9 ft | 50 | 2000 |
| FM over Mill Creek | Good | 146.0 ft | 50 | 1985 |
| Local over Small Un-named Creek | Good | 28.9 ft | 50 | 1991 |
| Local Sec RD over Waterman Creek | Good | 90.9 ft | 50 | 1988 |
| White AVE over Sewer Creek | Good | 36.1 ft | 50 | 2000 |
| Local over Floyd River | Good | 89.9 ft | 50 | 1986 |
| Polk AVE over Mill Creek | Good | 132.9 ft | 46 | 2021 |
| Local over So Br Little Floyd River | Good | 24.9 ft | 46 | 2001 |
| Local over West Branch Mill Creek | Good | 24.0 ft | 46 | 1966 |
| Nest AVE over Lamkin Creek | Good | 92.8 ft | 46 | 2014 |
| Nest AVE over Little Floyd River | Good | 152.9 ft | 46 | 2012 |
| FM over Waterman CR | Good | 178.1 ft | 45 | 2005 |
| Silver AVE over Nelson Creek | Good | 67.9 ft | 45 | 2016 |
| FM over Lange CR | Good | 78.1 ft | 45 | 1967 |
| Olive AVE over Mud Creek | Good | 35.1 ft | 41 | 2012 |
| 340th ST over Waterman Creek | Good | 132.9 ft | 41 | 2021 |
| Local over Little Floyd River | Good | 103.0 ft | 41 | 1992 |
| Local over Little Floyd River | Good | 36.1 ft | 41 | 1992 |
| Silver AVE over Willow Creek | Good | 67.9 ft | 40 | 2017 |
| Local over Cole Creek | Good | 28.9 ft | 35 | 1998 |
| Local over Jordan Creek | Good | 24.0 ft | 35 | 1995 |
| Redwood AVE over Dry Run | Good | 92.8 ft | 35 | 2023 |
| Local over Little Waterman Creek | Good | 69.9 ft | 35 | 1952 |
| Warbler AVE over Little Waterman CR | Good | 113.8 ft | 35 | 2019 |
| Local over So Br Little Floyd River | Good | 103.0 ft | 35 | 1975 |
| Tanager AVE over Waterman Creek | Good | 29.9 ft | 35 | 2022 |
| Local over Floyd River | Good | 42.0 ft | 35 | 2008 |
| 420th ST over Mccreath Creek | Good | 67.9 ft | 34 | 2015 |
| Sorrel AVE over Willow Creek | Good | 67.9 ft | 30 | 2017 |
| Local Sec RD over Drainage Way | Good | 35.1 ft | 30 | 2008 |
| Local Sec RD over Deep CR | Good | 24.9 ft | 30 | 1989 |
| Local Sec RD over Small Un-named Creek | Good | 35.1 ft | 30 | 2006 |
| 440th ST over Dry Run | Good | 34.1 ft | 30 | 2012 |
| Starling AVE over Dry Run | Good | 42.0 ft | 30 | 2018 |
| Polk AVE over Dry Run Creek | Good | 92.8 ft | 30 | 2021 |
| Polk AVE over So Br Little Floyd River | Good | 67.9 ft | 30 | 2015 |
| Local over Plessis Creek | Good | 21.0 ft | 30 | 1999 |
| Local over Floyd River | Good | 128.0 ft | 30 | 1981 |
| Local over Sweeney Creek | Good | 36.1 ft | 30 | 1995 |
| Starling AVE over Willow Creek | Good | 67.9 ft | 26 | 2014 |
| 450th ST over Mud Creek | Good | 49.9 ft | 26 | 2011 |
| Local Sec RD over Lange Creek South | Good | 35.1 ft | 26 | 2001 |
| B46 420th ST over Waterman Creek | Good | 152.9 ft | 26 | 2022 |
| Warbler AVE over Jordan Creek | Good | 67.9 ft | 26 | 2016 |
| FM over Small Un-named Creek | Good | 29.9 ft | 26 | 1969 |
| Local Sec RD over Sewer Creek | Good | 32.2 ft | 26 | 1991 |
| Local over Wolf Creek | Good | 36.1 ft | 26 | 1991 |
| Wilson AVE over Waterman Creek | Good | 152.2 ft | 21 | 2020 |
| Local Sec RD over Dry Run | Good | 35.1 ft | 21 | 1949 |
| 410th ST over Mill Creek | Good | 122.0 ft | 21 | 2012 |
| Local over Little Waterman Creek | Good | 30.8 ft | 21 | 2006 |
| Sorrel AVE over Dry Run | Good | 34.1 ft | 21 | 2017 |
| Local over Floyd River | Good | 32.2 ft | 21 | 1982 |
| 300th ST over Plessis Creek | Good | 49.9 ft | 21 | 2017 |
| Local over Floyd River | Good | 128.0 ft | 21 | 1995 |
| Local over Engels Creek | Good | 37.1 ft | 21 | 1981 |
| Wilson AVE over Small Unnamed Creek | Good | 21.0 ft | 21 | 2016 |
| FM over Ocheyedan River | Good | 227.0 ft | 20 | 1979 |
| 480th ST over Willow Creek | Good | 70.9 ft | 15 | 2018 |
| Local Sec RD over Mccreath CR | Good | 34.1 ft | 15 | 2001 |
| Local Sec RD over Barry Creek | Good | 36.1 ft | 15 | 1976 |
| Local over Mill Creek | Good | 103.0 ft | 15 | 1988 |
| Van Buren AVE over Waterman Creek | Good | 97.4 ft | 15 | 2020 |
| Local over Waterman Creek | Good | 57.1 ft | 15 | 1978 |
| Local over Floyd River | Good | 78.1 ft | 15 | 1987 |
| Local over Murray Creek | Good | 25.9 ft | 11 | 1991 |
| Sorrell AVE over Ginger Creek | Good | 37.1 ft | 11 | 2016 |
| Polk AVE over Mill Creek | Good | 132.9 ft | 11 | 2022 |
| Local over Small Un-named Creek | Good | 28.9 ft | 11 | 1991 |
| Local over Willow Creek | Good | 35.1 ft | 11 | 2004 |
| Local over Mill Creek | Good | 30.8 ft | 11 | 1998 |
| 500th ST over Dog Creek | Good | 32.2 ft | 10 | 2009 |
| Local Sec RD over Lange Creek South | Good | 21.0 ft | 5 | 1969 |
| Local over So Br Little Floyd River | Good | 35.1 ft | 5 | 2002 |