| Ia 9 over Stream | 1967 | 3,670 | Fair |
| Ia 51 over Hecher Creek | 1967 | 2,690 | Good |
| Ia 51 over Yellow River | 1967 | 2,690 | Good |
| Front St over Clear Creek | 1985 | 2,418 | Good |
| Ia 76 over Drainage Ditch | 1996 | 2,370 | Good |
| Ia 76 over Yellow River | 1980 | 2,370 | Fair |
| Ia 9 over Mississippi River | 1931 | 2,200 | Poor |
| Ia 26 over Enterprise Creek | 1995 | 1,540 | Good |
| Ia 26 over Hayes Lake | 1998 | 1,540 | Good |
| Ia 26 over Indian Creek | 1935 | 1,540 | Fair |
| Ia 26 over Upper Iowa River | 1997 | 1,540 | Good |
| Ia 9 over Clear Creek | 1979 | 1,500 | Fair |
| Ia 9 over Clear Creek | 1978 | 1,500 | Good |
| Ia 51 over Branch Yellow River | 1967 | 1,440 | Fair |
| Ia 51 over N Fork Yellow River | 1967 | 1,440 | Fair |
| FM over Yellow River | 1962 | 1,375 | Fair |
| X52 over Cota Creek | 1987 | 999 | Fair |
| Local Rd over Paint Creek | 1986 | 982 | Fair |
| Ia 76 over Bear Creek | 1955 | 980 | Fair |
| Ia 76 over Mineral Creek | 1929 | 980 | Fair |
| Ia 76 over Stream | 1955 | 980 | Fair |
| Ia 76 over Upper Iowa River | 1955 | 980 | Fair |
| FM over Branch Yellow River | 1999 | 933 | Poor |
| FM over Yellow River | 1970 | 933 | Fair |
| Ia 76 over Stream | 1977 | 860 | Good |
| Ia 76 over Waterloo Creek | 1929 | 860 | Fair |
| Ia 76 over Waterloo Creek | 1929 | 860 | Fair |
| FM over Village Creek | 1981 | 707 | Fair |
| Local over Upper Iowa River | 2004 | 690 | Good |
| X20 over Small | 2004 | 690 | Fair |
| 4TH St over Clear Creek | 2003 | 675 | Good |
| FM over Branch Village Creek | 1947 | 668 | Fair |
| A26 Iowa River Dr over Br Upper Iowa River | 2018 | 660 | Good |
| A26 Iowa River Dr over Branch Iowa River | 2022 | 648 | Good |
| FM over Branch Upper Iowa River | 1930 | 648 | Fair |
| FM over Branch Williams Creek | 1958 | 589 | Fair |
| FM over Branch Williams Creek | 1958 | 589 | Fair |
| FM over Branch Williams Creek | 1958 | 589 | Fair |
| FM over Williams Creek | 1958 | 589 | Fair |
| FM over Yellow River | 1968 | 589 | Fair |
| FM over Branch Village Creek | 1925 | 570 | Fair |
| X52-greatrvr Rd over Drainage Ditch | 2013 | 570 | Fair |
| FM over Wexford Creek | 1970 | 530 | Poor |
| FM over Oil Springs | 1980 | 520 | Fair |
| FM over Branch Williams Creek | 1958 | 511 | Fair |
| FM over Village Creek | 1958 | 462 | Fair |
| FM over Paint Creek | 1964 | 442 | Fair |
| FM over Branch Yellow River | 1959 | 422 | Fair |
| FM over Branch Yellow River | 1959 | 422 | Fair |
| FM over Branch Yellow River | 1959 | 422 | Fair |
| W60 Old Stage Rd over Branch Yellow River | 1959 | 422 | Fair |
| B25 Chestnut St over Cota Creek | 2021 | 420 | Good |
| FM over Branch Yellow River | 1922 | 373 | Poor |
| Yellow River Dr over Stream | 1967 | 373 | Fair |
| Dorchesterdr over Small Natural Stream | 1954 | 344 | Fair |
| A26 Bearcreekdr over Bear Creek | 2012 | 310 | Good |
| Local Rd over Village Creek | 2003 | 295 | Good |
| Local over Waterloo Creek | 1983 | 295 | Fair |
| Local Rd over Br Miss River | 1978 | 294 | Poor |
| FM over Clear Creek | 1962 | 200 | Poor |
| Green Valley Rd over Village Creek | 2018 | 200 | Good |
| FM over Br Upper Iowa River | 1952 | 196 | Fair |
| Local over Village Creek | 1966 | 157 | Poor |
| Makee Drive over Village Creek | 2022 | 157 | Good |
| Makee Drive over Village Creek | 2022 | 157 | Good |
| FM over Paint Creek | 1990 | 147 | Fair |
| Dorchesterdr over Drainage Ditch | 1954 | 137 | Fair |
| FM over Branch Paint Creek | 1960 | 137 | Fair |
| FM over Paint Creek | 1957 | 137 | Fair |
| FM over Paint Creek | 1957 | 137 | Poor |
| X6A Mays Prairie over French Creek | 2018 | 137 | Good |
| FM over Branch Yellow River | 2001 | 128 | Good |
| Local Rd over Teeple Creek | 1960 | 128 | Fair |
| Local over Yellow River | 1954 | 128 | Poor |
| White Pine Road over Branch Paint Creek | 2020 | 128 | Good |
| South Road over Clear Creek | 2017 | 121 | Good |
| Local over Paint Creek | 1900 | 120 | Poor |
| N Folk Hollow Rd over Norfolk Creek | 2017 | 120 | Good |
| Local over Branch Village Creek | 1940 | 108 | Fair |
| Local over Village Creek | 1974 | 108 | Fair |
| Local over Yellow River | 1953 | 108 | Fair |
| FM over Yellow River | 2010 | 100 | Good |
| Linton Dr over Branch Yellow River | 2005 | 100 | Good |
| FM over Br Yellow River | 2001 | 98 | Good |
| Yellow Rvr Rd over Norfolk Creek | 2015 | 98 | Good |
| Local over Paint Creek | 1992 | 97 | Good |
| Local over Village Creek | 2003 | 97 | Good |
| FM over Branch Village Creek | 2003 | 88 | Good |
| Local over Br Yellow River | 1975 | 88 | Fair |
| Local over Lewis Jones Creek | 1975 | 88 | Fair |
| Swebakken Rd over Paint Creek | 2004 | 80 | Good |
| Yellow Rvr Sf over Paint Creek | 1960 | 80 | Fair |
| FM over French Creek | 1958 | 79 | Fair |
| FM over Yellow River | 2001 | 79 | Good |
| Local over Branch Paint Creek | 1995 | 78 | Fair |
| Local over Paint Creek | 1961 | 78 | Fair |
| FM over Branch Yellow River | 1959 | 70 | Poor |
| Ferris Mill Rd over Br Upper Iowa River | 2017 | 70 | Good |
| Local Rd over Br Suttle Creek | 1900 | 70 | Poor |
| Local Rd over Suttle Creek | 1996 | 70 | Fair |
| Local over Br Waterloo Creek | 1954 | 70 | Fair |
| Local over Branch Paint Creek | 1996 | 70 | Fair |
| Local over Hickory Creek | 1982 | 70 | Fair |
| Local over Upper Iowa River | 1991 | 70 | Good |
| FM over Bear Creek | 1954 | 69 | Fair |
| FM over Br Upper Iowa River | 1997 | 69 | Fair |
| FM over Branch Bear Creek | 2000 | 69 | Fair |
| FM over Branch Yellow River | 1958 | 69 | Fair |
| FM over Paint Creek | 2002 | 69 | Fair |
| FM over Paint Creek | 1990 | 69 | Good |
| FM over Patterson Creek | 1938 | 69 | Poor |
| FM over Upper Iowa River | 1974 | 69 | Fair |
| Brady Dr over Br Paint Creek | 2012 | 60 | Good |
| Local Rd over Teeple Creek | 1900 | 60 | Poor |
| Local over Paint Creek | 1915 | 60 | Poor |
| Local over Paint Creek | 2004 | 60 | Good |
| Local over Patterson Creek | 1941 | 60 | Fair |
| Local over Branch Paint Creek | 1995 | 59 | Fair |
| Local over Branch Upper Iowa River | 2003 | 59 | Good |
| Local over Paint Creek | 2002 | 59 | Good |
| Local over Silver Creek | 1958 | 59 | Poor |
| Local over Upper Iowa River | 1986 | 59 | Fair |
| Smithfield Drive over Branch Yellow River | 2021 | 59 | Good |
| FM over Upper Iowa River | 1994 | 49 | Good |
| Local Rd over Br Yellow River | 1977 | 49 | Fair |
| Local Rd over Cota Creek | 1991 | 49 | Fair |
| Local Rd over Hickory Creek | 1900 | 49 | Fair |
| Local over Br Patterson Creek | 1977 | 49 | Fair |
| Local over Br Upper Iowa River | 1963 | 49 | Fair |
| Local over Br Village Creek | 1962 | 49 | Fair |
| Local over Yellow River | 1993 | 49 | Fair |
| Williams Crk Rd over Williams Creek | 2015 | 49 | Good |
| Local over Br Upper Iowa River | 1956 | 45 | Fair |
| Bethel Rd over Williams Creek | 2015 | 44 | Good |
| FM over Br Village Creek | 1961 | 44 | Fair |
| FM over Br Village Creek | 1988 | 44 | Fair |
| FM over Village Creek | 1966 | 44 | Fair |
| Local Rd over Village Creek | 1965 | 44 | Fair |
| Local over Village Creek | 1965 | 44 | Fair |
| Local over Village Creek | 1960 | 44 | Fair |
| Luster Heights Rd over Small Stream | 2000 | 40 | Fair |
| English Bench Road over Br Upper Iowa River | 2020 | 39 | Good |
| FM over Branch Yellow River | 1959 | 39 | Fair |
| Irish Hollow Rd over Br Upper Iowa River | 2013 | 39 | Good |
| Local Rd over Br Yellow River | 1966 | 39 | Fair |
| Local Rd over Lewis Jones Creek | 2002 | 39 | Good |
| Local Rd over Yellow River | 1954 | 39 | Fair |
| Local over Branch Waterloo Creek | 1960 | 39 | Fair |
| Local over Hickory Creek | 1982 | 39 | Good |
| Local over Paint Creek | 1997 | 39 | Fair |
| Local over Village Creek | 1974 | 39 | Fair |
| Local over Clear Creek | 1995 | 33 | Fair |
| Local over Paint Creek | 1975 | 33 | Fair |
| Local over Village Creek | 1952 | 33 | Fair |
| Local over Village Creek | 2005 | 33 | Good |
| Local over Drainage | 2006 | 30 | Good |
| Local Rd over Teeple Creek | 1988 | 29 | Good |
| Local Rd over Trout Run | 1965 | 29 | Fair |
| Local over Br Patterson Creek | 1915 | 29 | Fair |
| Local over Br Yellow River | 1964 | 29 | Fair |
| Local over Branch Yellow River | 2001 | 29 | Good |
| Local over Branch Yellow River | 1962 | 29 | Fair |
| Local over Patterson Creek | 1977 | 29 | Fair |
| Local over Small Stream | 2000 | 29 | Good |
| Local over Weyford Creek | 1960 | 29 | Poor |
| Bee Rd over Waterloo Creek | 1960 | 26 | Fair |
| Living Springs Rd over Yellow River | 2022 | 26 | Good |
| Local over Br Clear Creek | 2001 | 26 | Fair |
| Local over Clear Creek | 1979 | 26 | Fair |
| Local over Cota Creek | 1982 | 26 | Fair |
| Local over Paint Creek | 2001 | 26 | Good |
| Local over Penny Springs | 1985 | 26 | Fair |
| Local over Small Stream | 1975 | 26 | Fair |
| Local over Yellow River | 1900 | 26 | Poor |
| FM over Village Creek | 1968 | 25 | Fair |
| Local over Waterloo Creek | 2006 | 25 | Good |
| Village Creek Dr over Branch Village Creek | 1959 | 25 | Fair |
| Doehler Dr over Br Village Creek | 2000 | 20 | Good |
| Local Rd over Br Lewis Jones Creek | 2002 | 20 | Good |
| Local Rd over Br Yellow River | 2002 | 20 | Good |
| Local over Bear Creek | 2000 | 20 | Good |
| Local over Br Lewis Jones Creek | 2003 | 20 | Good |
| Local over Br Waterloo Creek | 1953 | 20 | Fair |
| Clear Creek Wma over Clear Creek | 1900 | 15 | Fair |
| Local over Br Clear Creek | 1978 | 15 | Fair |
| Local over Br Upper Ia River | 1961 | 15 | Fair |
| Local over Br Upper Iowa River | 1937 | 15 | Fair |
| Local over Silver Creek | 1960 | 15 | Fair |
| Mineral Creek D over Mineral Creek | 2013 | 15 | Good |
| Local Rd over Br Yellow River | 1941 | 11 | Poor |
| Local over Br Yellow River | 1991 | 11 | Fair |
| Donahue Rd over Paint Creek | 1900 | 10 | Fair |
| Local over Village Creek | 1900 | 10 | Poor |
| Local Farm Lane over Br Williams Creek | 1975 | 5 | Fair |
| Local over Br Coon Creek | 1977 | 5 | Fair |
| Local over Clear Creek | 1915 | 5 | Poor |
| Local over Paint Creek | 1976 | 5 | Fair |