| Ia 9 over Trout Creek | 1969 | 14,900 | Fair |
| Ia 9 over Division St | 1969 | 8,900 | Fair |
| College Dr over Upper Iowa River | 1987 | 8,868 | Fair |
| Ia 9 over Trout Creek | 1969 | 5,400 | Fair |
| US 52 over Dry Run | 1963 | 4,230 | Fair |
| US 52 over Stream & Twin Springs Rd | 1963 | 4,230 | Fair |
| Ia 9 over Dry Run Creek | 1945 | 3,880 | Fair |
| US 52 over Upper Iowa River | 1963 | 3,340 | Fair |
| Ia 24 over Stream | 2008 | 2,970 | Good |
| Ia 24 over Turkey River Overflow | 2006 | 2,970 | Good |
| Ia 24 over Turkey River | 2006 | 2,860 | Good |
| Ia 24 over Goddard Creek | 2006 | 2,810 | Good |
| Ia 150 over Broachamp Creek | 1994 | 2,590 | Good |
| US 52 over Silver Creek | 1974 | 2,580 | Fair |
| Trout Run Rd over Creek | 2013 | 2,553 | Good |
| Ia 9 over Smith Creek | 1969 | 2,310 | Fair |
| Ia 24 over Goddard Creek | 1932 | 2,250 | Fair |
| Ia 150 over Stream | 1988 | 2,210 | Fair |
| Ia 150 over Stream | 1988 | 2,180 | Good |
| Ia 24 over Little Turkey River | 2013 | 1,940 | Good |
| A6W River Rd over Drainage | 1985 | 1,856 | Fair |
| Fifth Ave over Upper Iowa River | 2005 | 1,774 | Good |
| FM over Canoe Creek | 2002 | 1,581 | Good |
| Ia 139 over Stream | 1995 | 1,560 | Fair |
| Ia 139 over Stream | 1990 | 1,560 | Good |
| Ia 139 over Upper Iowa River | 1990 | 1,560 | Good |
| Co Rd B16 over Turkey River | 2009 | 1,522 | Good |
| Pole Line Rd over Drainage Ditch | 2021 | 1,449 | Good |
| FM over Stream | 2002 | 1,375 | Good |
| FM over Stream | 1959 | 1,375 | Fair |
| FM over Trout River | 2002 | 1,375 | Good |
| FM over Stream | 1958 | 1,169 | Fair |
| Local over Drainage | 1931 | 1,090 | Fair |
| Old Stage Rd over Creek | 2001 | 1,051 | Fair |
| FM over Trout River | 1956 | 953 | Poor |
| W 42 over Creek | 2013 | 933 | Good |
| FM over Trout Creek | 1962 | 894 | Fair |
| W20 Pole Line Rd over Upper Iowa River | 2022 | 891 | Good |
| 5TH St over Upper Iowa River | 1983 | 830 | Good |
| Ia 139 over Elliot Creek | 1954 | 830 | Good |
| Local over Trout Creek | 2003 | 805 | Good |
| Trout Run Rd over Small Stream | 2016 | 805 | Good |
| FM over Creek | 1973 | 795 | Fair |
| FM over North Bear Creek | 1993 | 786 | Fair |
| A 46 over Turkey River | 2018 | 766 | Good |
| FM over Turkey River | 1956 | 766 | Fair |
| FM over Yellow River N Fork | 1962 | 740 | Fair |
| FM over Small Creek | 1986 | 697 | Poor |
| FM over Trout River | 1958 | 697 | Poor |
| Main St over Turkey River | 2009 | 669 | Good |
| FM over Turkey River | 1955 | 658 | Fair |
| FM over Turkey River Branch | 1962 | 658 | Fair |
| W 14 over Turkey River Branch | 2000 | 658 | Good |
| Co Rd V68 over Small Creek | 2009 | 649 | Good |
| Main St over Small Natural Stream | 1940 | 649 | Poor |
| FM over Canoe Creek | 1959 | 580 | Good |
| North Winn Rd over Canoe Creek | 1959 | 570 | Good |
| FM over Creek | 1962 | 560 | Fair |
| FM over Pine Creek | 1962 | 560 | Fair |
| FM over Silver Creek | 1973 | 560 | Fair |
| A 18 over Creek | 2013 | 550 | Good |
| William St-2nd over Dry Run Creek | 1960 | 541 | Fair |
| FM over Yellow River | 1955 | 520 | Fair |
| FM over Small Stream | 2007 | 501 | Good |
| FM over Turkey River | 1957 | 491 | Fair |
| FM over Yellow River | 1964 | 491 | Fair |
| FM over Upper Iowa River | 2005 | 471 | Good |
| V 64 over Creek | 1957 | 471 | Fair |
| Local over Small | 1988 | 442 | Good |
| Local over Upper Iowa River | 1988 | 442 | Good |
| FM over Ten Mile Creek Branch | 1968 | 410 | Fair |
| FM over Ten Mile Creek | 2005 | 393 | Fair |
| FM over Upper Iowa River | 1986 | 363 | Fair |
| Main St over Wonder Creek | 1956 | 360 | Fair |
| FM over Walnut Creek (ten Mile) | 1950 | 344 | Fair |
| Pole Line Rd over Small Stream | 1950 | 344 | Fair |
| Sumner St over Dry Run Creek | 1970 | 339 | Fair |
| FM over Upper Iowa River | 1937 | 324 | Poor |
| FM over Upper Iowa River Branch | 1987 | 324 | Good |
| Local Road over Creek | 2008 | 323 | Good |
| Pleasant Ave over Ia 9 | 1969 | 309 | Fair |
| FM over Canoe Creek | 1992 | 304 | Good |
| 337TH St over Canoe Creek Branch | 1971 | 265 | Fair |
| FM over Canoe Creek Branch | 1971 | 265 | Fair |
| FM over Upper Iowa River | 1967 | 265 | Fair |
| FM over Upper Iowa River | 1976 | 265 | Good |
| FM over Drainage | 1990 | 236 | Good |
| FM over S. Bear Creek | 1975 | 236 | Good |
| FM over Ten Mile Creek | 1952 | 236 | Fair |
| FM over Small Creek | 2004 | 226 | Fair |
| Local over Upper Iowa River | 1985 | 207 | Poor |
| FM over Krumm Creek | 1981 | 206 | Fair |
| FM over Upper Iowa River | 1999 | 206 | Good |
| 236TH Ave over Silver Creek | 1928 | 187 | Poor |
| Middle Sattre Rd over Canoe Creek | 2006 | 187 | Good |
| Middle Sattre Rd over Creek | 1976 | 187 | Fair |
| A14 over Pine Creek | 2016 | 157 | Good |
| Little Church Rd over Turkey River | 1977 | 148 | Good |
| FM over Canoe Creek | 1935 | 147 | Fair |
| FM over North Bear Creek | 1952 | 137 | Poor |
| FM over Trout Creek | 1995 | 137 | Good |
| FM over Trout Creek Branch | 1995 | 137 | Good |
| FM over Turkey River | 1979 | 128 | Good |
| Local Road over Dry Run Creek | 2007 | 128 | Good |
| Meadowlark Rd over Creek | 1976 | 128 | Poor |
| FM over Creek | 1961 | 120 | Fair |
| FM over Pine Creek | 1962 | 120 | Fair |
| Rogers Creek Rd over Rogers Creek | 2012 | 120 | Good |
| 123RD St over Turkey River | 1936 | 118 | Fair |
| FM over Running Creek | 1978 | 118 | Fair |
| FM over Upper Iowa River | 2003 | 118 | Good |
| FM over Upper Iowa River Branch | 1971 | 118 | Fair |
| Local over Pine Creek | 1938 | 118 | Poor |
| Local over Ten Mile Creek | 1900 | 118 | Poor |
| 244TH Ave over Upper Iowa River | 1924 | 108 | Poor |
| FM over Trout Run Creek Branch | 1943 | 108 | Good |
| Local Road over Creek | 1900 | 108 | Poor |
| FM over Dry Creek | 1957 | 98 | Fair |
| FM over Paint Creek | 1941 | 98 | Fair |
| FM over Turkey River | 1985 | 98 | Fair |
| Local over Creek | 1900 | 97 | Poor |
| Local over Silver Creek | 1939 | 97 | Fair |
| Local over Small Creek | 1981 | 97 | Good |
| Local over Turkey River | 2003 | 97 | Good |
| FM over Creek | 1969 | 90 | Fair |
| 360TH St over Small Stream | 2000 | 88 | Fair |
| FM over Minor Creek | 1970 | 88 | Poor |
| FM over Wonder Creek | 1970 | 88 | Fair |
| Local Road over Bohemian Creek | 1922 | 88 | Poor |
| Local Road over Bohemian Creek | 1962 | 88 | Poor |
| Local over Creek | 1900 | 88 | Poor |
| Local over Small | 1978 | 88 | Fair |
| 295TH Ave over Small Creek | 2011 | 79 | Good |
| FM over Small Creek | 2005 | 79 | Good |
| FM over Upper Iowa River | 1961 | 79 | Fair |
| FM over Upper Iowa River Branch | 1962 | 79 | Fair |
| 107TH Ave over Creek | 1965 | 78 | Poor |
| 210TH Ave over Creek | 2014 | 78 | Good |
| 240TH St over Creek | 2020 | 78 | Good |
| Local Road over Creek | 2003 | 78 | Fair |
| Local Road over Creek | 1962 | 78 | Poor |
| Local Road over Creek | 1990 | 78 | Fair |
| Local Road over Humpal Creek | 1900 | 78 | Fair |
| Local over Canoe Creek | 2001 | 78 | Good |
| Local over Creek | 1980 | 78 | Fair |
| Local over Creek | 1965 | 78 | Fair |
| Local over Creek | 1977 | 78 | Fair |
| Local over North Bear Creek | 1900 | 78 | Fair |
| 180TH Ave over Creek | 2012 | 70 | Fair |
| Ferris Mill Rd over Creek | 1900 | 70 | Poor |
| Local Rd over Small | 1978 | 70 | Fair |
| Local Road over Coldwater Creek | 1970 | 70 | Fair |
| Local Road over Creek | 1995 | 70 | Fair |
| Local Road over Creek | 1966 | 70 | Fair |
| Local Road over Drainage | 1969 | 70 | Fair |
| Local Road over Humpal Creek | 1964 | 70 | Fair |
| Local over Canoe Creek | 1989 | 70 | Good |
| Local over Cold Water Creek | 1962 | 70 | Fair |
| Local over Creek | 2005 | 70 | Good |
| Local over Creek | 1985 | 70 | Good |
| Local over Creek | 1900 | 70 | Fair |
| Local over Creek | 1900 | 70 | Poor |
| Local over Mouth of Canoe | 1975 | 70 | Good |
| Local over Small Creek | 1976 | 70 | Fair |
| Local over Small Stream | 1974 | 70 | Fair |
| Local over Ten Mile Creek Branch | 1966 | 70 | Fair |
| Local over Upper Iowa River | 1900 | 70 | Poor |
| Local over Upper Iowa River | 1986 | 70 | Good |
| State Line Rd over Creek | 2015 | 70 | Good |
| 111TH Ave over Yellow River | 2015 | 69 | Good |
| 150TH St over Stream | 1892 | 69 | Poor |
| FM over Br. Turkey River | 1953 | 69 | Fair |
| FM over North Bear Creek | 1985 | 69 | Good |
| FM over Upper Iowa River | 1952 | 69 | Fair |
| Scenic River Rd over Upper Iowa River | 2021 | 60 | Good |
| Coldwater Creek Rd over Creek | 1978 | 59 | Poor |
| FM over Drainage Ditch | 1976 | 59 | Fair |
| FM over Tangen Creek | 1935 | 59 | Fair |
| FM over Tangen Creek | 1961 | 59 | Fair |
| FM over Trout Creek Branch | 1900 | 59 | Fair |
| Local Road over Creek | 1991 | 59 | Good |
| Local Road over Creek | 1977 | 59 | Poor |
| Local Road over Creek | 1900 | 59 | Fair |
| Local Road over Creek | 1900 | 59 | Fair |
| Local Road over Creek | 1939 | 59 | Fair |
| Local over Creek | 1965 | 59 | Fair |
| Local over Creek | 1965 | 59 | Fair |
| Local over Creek | 1997 | 59 | Good |
| Local over Small | 1978 | 59 | Fair |
| Local over Small Creek | 1979 | 59 | Good |
| Manawa Trail Rd over Canoe Creek | 1979 | 59 | Good |
| Town Line Rd over Creek | 1979 | 59 | Good |
| 185TH St over Creek | 2021 | 50 | Good |
| 307TH Ave over Creek | 2019 | 50 | Good |
| FM over Trout River | 1967 | 50 | Good |
| 133RD Ave over Trout River | 1967 | 49 | Good |
| 223RD Ave over Canoe Creek | 1972 | 49 | Good |
| 235TH Ave over Ten Mile Creek | 2013 | 49 | Good |
| FM over North Bear Creek | 1900 | 49 | Poor |
| FM over Pine Creek | 1985 | 49 | Good |
| Local Road over Canoe Creek | 1908 | 49 | Poor |
| Local Road over Canoe Creek | 1972 | 49 | Good |
| Local Road over Creek | 1900 | 49 | Fair |
| Local Road over Creek | 1991 | 49 | Good |
| Local Road over Creek | 1967 | 49 | Fair |
| Local Road over Pine Creek | 1965 | 49 | Fair |
| Local Road over Pine Creek | 1967 | 49 | Fair |
| Local Road over Ten Mile Creek | 2010 | 49 | Good |
| Local Road over Ten Mile Creek | 2010 | 49 | Good |
| Local Road over Ten Mile Creek | 1984 | 49 | Good |
| Local over Creek | 1980 | 49 | Fair |
| Local over Small Creek | 1985 | 49 | Good |
| Local over Upper Iowa River | 1900 | 49 | Poor |
| West Ravine Rd over Upper Iowa River | 2011 | 49 | Good |
| FM over Creek | 1967 | 45 | Good |
| Local over Ten Mile Creek | 1972 | 45 | Good |
| 210TH St over Unnamed Drainage | 2023 | 44 | Good |
| 361ST St over Drainage | 1997 | 44 | Good |
| Local Road over Coon Creek | 1992 | 44 | Good |
| Local Road over Creek | 1998 | 44 | Good |
| Local Road over Creek | 1971 | 44 | Fair |
| Local Road over Creek | 1953 | 44 | Fair |
| Local Road over Creek | 2002 | 44 | Good |
| Local Road over Creek | 1970 | 44 | Fair |
| Local Road over Turkey River | 1964 | 44 | Fair |
| Local Road over Wonder Creek | 1991 | 44 | Good |
| Local over Canoe Creek | 1985 | 44 | Good |
| Local over Creek | 1944 | 44 | Poor |
| Local over Creek | 1977 | 44 | Poor |
| Scenic River Rd over Creek | 1900 | 44 | Fair |
| Local Road over Creek | 1968 | 40 | Fair |
| 111TH Ave over N Fork of Yellow Rivr | 2000 | 39 | Good |
| FM over North Bear Creek | 1957 | 39 | Poor |
| FM over Upper Iowa River | 1913 | 39 | Poor |
| Little Church Rd over Turkey River | 2010 | 39 | Good |
| Local Road over Creek | 1900 | 39 | Fair |
| Local Road over Creek | 1957 | 39 | Fair |
| Local Road over Creek | 1900 | 39 | Poor |
| Local Road over Creek | 1900 | 39 | Poor |
| Local Road over Creek | 1976 | 39 | Fair |
| Local Road over Creek | 1966 | 39 | Fair |
| Local Road over Creek | 1900 | 39 | Poor |
| Local Road over Silver Creek | 1969 | 39 | Fair |
| Local Road over Turkey River | 1962 | 39 | Fair |
| Local over Creek | 1968 | 39 | Fair |
| Local over Creek | 1980 | 39 | Fair |
| Local over North Fork Yellow River | 1991 | 39 | Good |
| Local over Small | 1978 | 39 | Fair |
| Local over Small | 1978 | 39 | Fair |
| Local over Small Creek | 1981 | 39 | Good |
| Local over Small Stream | 1900 | 39 | Fair |
| Local over Yellow River | 1998 | 39 | Good |
| Local over Yellow River Branch | 1975 | 39 | Fair |
| Ranch Rd over Creek | 2011 | 39 | Good |
| FM over Running Creek | 1977 | 34 | Good |
| FM over Small | 1978 | 34 | Fair |
| 220TH St over Turkey River | 1900 | 33 | Fair |
| 230TH St over Creek | 2018 | 33 | Good |
| 335TH Ave over Bohemian Creek | 2013 | 33 | Good |
| Local Road over Creek | 1975 | 33 | Fair |
| Local Road over Creek | 2006 | 33 | Fair |
| Local Road over Creek | 1900 | 33 | Fair |
| Local Road over Dry Run Creek | 1971 | 33 | Fair |
| Local Road over Trout Creek | 1915 | 33 | Poor |
| Local Road over Turkey River | 1959 | 33 | Poor |
| Local over Dry Creek | 1988 | 33 | Fair |
| Local over Fitzgerald Creek | 1969 | 33 | Fair |
| Local over Small Stream | 1998 | 33 | Good |
| Swan Rd over Creek | 1900 | 33 | Fair |
| 107TH Ave over Yellow River | 2018 | 29 | Good |
| 236TH Ave over Creek | 1900 | 29 | Fair |
| 288TH Ave over Coldwater Creek | 2015 | 29 | Good |
| 360TH St over North Bear Creek | 2022 | 29 | Good |
| Bear Creek Rd over Bear Creek | 2017 | 29 | Good |
| Cattle Creek Rd over Upper Iowa River | 2019 | 29 | Good |
| Local Road over Creek | 1915 | 29 | Poor |
| Local Road over Creek | 1900 | 29 | Fair |
| Local Road over Creek | 1900 | 29 | Poor |
| Local Road over Creek | 1900 | 29 | Poor |
| Local Road over Creek | 1900 | 29 | Fair |
| Local Road over Creek | 1900 | 29 | Fair |
| Local Road over Trout Creek | 1900 | 29 | Fair |
| Local over Creek | 1900 | 29 | Fair |
| Local over Creek | 1973 | 29 | Fair |
| Local over North Fork Yellow River | 1984 | 29 | Fair |
| Local over North Fork Yellow River | 1913 | 29 | Fair |
| Local over Small Creek | 1979 | 29 | Good |
| Local over Small Running Creek | 1900 | 29 | Poor |
| Middle Hesper Rd over Creek | 1900 | 29 | Fair |
| 230TH St over Small Stream | 1974 | 26 | Fair |
| 275TH St over Unnamed Creek | 2019 | 26 | Good |
| Chimney Rock Rd over Creek | 1900 | 26 | Poor |
| Chimney Rock Rd over Upper Iowa River | 2020 | 26 | Good |
| Local Rd over Small | 1978 | 26 | Poor |
| Local Road over Canoe Creek | 1900 | 26 | Fair |
| Local Road over Creek | 2002 | 26 | Good |
| Local Road over Creek | 1900 | 26 | Poor |
| Local Road over Creek | 1900 | 26 | Poor |
| Local Road over Wonder Creek | 1998 | 26 | Good |
| Local over Creek | 1900 | 26 | Fair |
| Local over Small Creek | 1900 | 26 | Fair |
| Pine Creek Rd over Pine Creek | 2016 | 26 | Good |
| Scenic River Rd over Creek | 2015 | 26 | Good |
| Scenic River Rd over Creek | 1990 | 26 | Fair |
| Local over Bigalk Creek | 1987 | 25 | Good |
| Oneota Dr over Drainage Channel | 2019 | 25 | Good |
| 128TH Ave over North Bear Creek | 2006 | 20 | Good |
| 315TH Ave over Creek | 2019 | 20 | Good |
| Cattle Creek Rd over Creek | 1900 | 20 | Poor |
| Local Rd over Creek | 1996 | 20 | Good |
| Local Road over Coldwater Creek | 1994 | 20 | Good |
| Local Road over Creek | 2002 | 20 | Good |
| Local Road over Creek | 1900 | 20 | Fair |
| Local Road over Creek | 1964 | 20 | Fair |
| Local Road over Dry Run Creek | 2005 | 20 | Good |
| Local Road over Small Dry Run | 1976 | 20 | Good |
| Local Road over Upper Iowa River | 1904 | 20 | Poor |
| Local over Canoe Creek | 1924 | 20 | Poor |
| Local over Creek | 1980 | 20 | Poor |
| Local over Creek | 1980 | 20 | Good |
| Local over Small Creek | 1985 | 20 | Fair |
| 107TH St over Creek | 2016 | 15 | Good |
| 279TH Ave over Drainage | 1900 | 15 | Poor |
| Local Road over Creek | 1972 | 15 | Poor |
| Local Road over Creek | 1900 | 15 | Fair |
| 301ST St over Creek | 1943 | 11 | Fair |
| Local Legno over Creek | 1913 | 11 | Poor |
| Local Legno over Creek | 1961 | 11 | Fair |
| Local Road over Canoe Creek | 1900 | 11 | Fair |
| Local Road over Creek | 2003 | 11 | Good |
| Local Road over Creek | 1971 | 11 | Poor |
| Local Road over Creek | 1900 | 11 | Poor |
| Local over Small | 1978 | 11 | Poor |
| Local over Yellow River Branch | 1990 | 11 | Fair |
| Moneek Rd over Yellow River N Fork | 2014 | 11 | Good |
| Field Entr. over Side Ditch | 1995 | 10 | Fair |
| Local Legno over Canoe Creek | 2008 | 10 | Fair |
| Local Legno over Creek | 1960 | 5 | Fair |
| Local Road over Creek | 1900 | 5 | Poor |
| Local over Creek | 1979 | 5 | Good |
| Local over Creek | 1989 | 5 | Fair |
| Local over Creek | 1900 | – | Fair |