| FM 340th ST over Little Sioux River | Poor | 203.1 ft | 2,573 | 1963 |
| FM 350th ST over Spring Creek | Poor | 78.1 ft | 1,806 | 1963 |
| FM 130th AVE over Ocheyedan River | Poor | 203.1 ft | 1,287 | 1971 |
| FM 280th AVE over Pickeral Run | Poor | 128.0 ft | 459 | 1993 |
| FM 480th ST over Little Sioux River | Poor | 378.0 ft | 369 | 1954 |
| FM 300th ST over Big Muddy Creek | Poor | 103.0 ft | 369 | 1963 |
| FM 280th ST over Little Sioux River | Poor | 174.9 ft | 270 | 1966 |
| FM 310th AVE over Ditch No.60 | Poor | 78.1 ft | 259 | 1967 |
| FM 160th AVE over Willow Creek | Poor | 70.9 ft | 190 | 1962 |
| 210th AVE over Little Sioux River | Poor | 180.1 ft | 62 | 1915 |
| 105th AVE over Henry Creek | Poor | 75.1 ft | 41 | 1965 |
| 355th ST over Little Sioux River | Poor | 180.1 ft | 41 | 1905 |
| 110th AVE over Willow Creek | Poor | 34.1 ft | 30 | 1928 |
| 470th ST over Little Sioux River | Poor | 212.9 ft | 26 | 1907 |
| 280th AVE over Elk Creek | Poor | 34.1 ft | 11 | 1917 |
| 290th ST over Stream | Poor | 52.2 ft | 5 | 1913 |
| US 71 over Br Of Little Meadow Crk | Fair | 42.0 ft | 11,400 | 1990 |
| US 18 over Lost Island Outlet | Fair | 105.0 ft | 4,270 | 1931 |
| US 18 over Drainage Ditch | Fair | 28.9 ft | 4,270 | 1965 |
| US 18 over Little Sioux Overflow | Fair | 42.0 ft | 4,170 | 1931 |
| US 71 over Willow Creek | Fair | 70.9 ft | 3,940 | 1923 |
| 350th ST over Little Sioux River | Fair | 223.1 ft | 2,584 | 1976 |
| US 18 over Little Sioux River | Fair | 179.1 ft | 2,560 | 1930 |
| FM 350th ST over Ocheyedan River | Fair | 223.1 ft | 1,806 | 1973 |
| FM 320th ST over Dd #28 | Fair | 29.9 ft | 1,228 | 1996 |
| FM 240th AVE over Drainage Ditch #28 | Fair | 44.0 ft | 1,228 | 1987 |
| Ia 10 over Little Sioux River | Fair | 355.0 ft | 1,030 | 1970 |
| FM 310th AVE over L Trumbull Outlet | Fair | 78.1 ft | 968 | 1970 |
| FM 350th ST over Drainage | Fair | 21.0 ft | 908 | 1972 |
| Railway ST over Elk Creek | Fair | 25.9 ft | 884 | 1996 |
| FM 350th ST over Big Meadow Creek | Fair | 128.0 ft | 878 | 1963 |
| 350th ST over Overflow Meadow Creek | Fair | 63.0 ft | 878 | 1976 |
| FM 190th AVE over Prairie Creek | Fair | 78.1 ft | 818 | 1964 |
| FM 400th ST over Willow Creek | Fair | 75.1 ft | 797 | 1968 |
| Ia 10 over Drainage Ditch | Fair | 42.7 ft | 700 | 1932 |
| FM 130th AVE over Willow Creek | Fair | 78.1 ft | 619 | 1964 |
| FM 100th AVE over Stream | Fair | 21.0 ft | 529 | 1972 |
| FM 440th ST over Small | Fair | 33.1 ft | 469 | 1988 |
| FM 300th ST over Drainage Ditch | Fair | 128.0 ft | 469 | 1963 |
| FM 300th ST over Little Meadow Ck | Fair | 26.9 ft | 369 | 1989 |
| FM 100th AVE over Br Ocheyedan R | Fair | 103.0 ft | 359 | 1967 |
| FM 280th ST over Stoney Creek | Fair | 128.0 ft | 270 | 1965 |
| FM 170th AVE over Willow Creek | Fair | 70.9 ft | 219 | 1963 |
| 340th ST over Stony Creek | Fair | 128.0 ft | 185 | 2003 |
| FM 150th AVE over Willow Creek | Fair | 128.0 ft | 180 | 1973 |
| 140th AVE over Ocheyedan River | Fair | 178.1 ft | 153 | 1963 |
| 330th ST over Stream | Fair | 32.2 ft | 123 | 1900 |
| 240th AVE over Little Meadows | Fair | 26.9 ft | 123 | 1999 |
| 230th AVE over Dd #28 | Fair | 32.2 ft | 123 | 1979 |
| FM 280th AVE over Pickerel Run | Fair | 26.9 ft | 120 | 1990 |
| 340th ST over Big Meadow Creek | Fair | 103.0 ft | 105 | 1981 |
| 290th AVE over Stream | Fair | 21.0 ft | 103 | 1994 |
| 225th AVE over Small Stream | Fair | 22.0 ft | 81 | 1978 |
| FM 320th ST over Big Meadow Creek | Fair | 78.1 ft | 80 | 1978 |
| 190th AVE over Willow Creek | Fair | 115.2 ft | 72 | 1978 |
| 330th ST over Stream | Fair | 128.0 ft | 72 | 2005 |
| 250th AVE over Little Muddy Creek | Fair | 26.9 ft | 72 | 1996 |
| FM 260th AVE over Overflow Little Sioux | Fair | 128.0 ft | 71 | 1966 |
| FM 260th AVE over Montgomery Creek | Fair | 38.1 ft | 71 | 1978 |
| FM 260th AVE over Little Sioux River | Fair | 253.0 ft | 71 | 1969 |
| 455th ST over Montgomery Creek | Fair | 24.9 ft | 62 | 2002 |
| 250th AVE over Prairie Creek | Fair | 89.9 ft | 62 | 1990 |
| 280th ST over Stream | Fair | 25.9 ft | 60 | 2000 |
| 180th AVE over Willow Creek | Fair | 90.9 ft | 50 | 1979 |
| FM 280th ST over Big Meadow Creek | Fair | 78.1 ft | 50 | 1977 |
| FM 290th AVE over Pickeral Run #37 | Fair | 23.0 ft | 50 | 1995 |
| FM 270th AVE over Meadow Creek | Fair | 78.1 ft | 50 | 1968 |
| 370th ST over Stream | Fair | 23.0 ft | 47 | 2001 |
| 490th ST over Montgomery Creek | Fair | 33.1 ft | 46 | 1990 |
| 190th AVE over Stream | Fair | 23.0 ft | 46 | 1999 |
| 300th AVE over Stream | Fair | 23.0 ft | 46 | 1999 |
| FM 200th AVE over Willow Creek | Fair | 115.2 ft | 45 | 1989 |
| 460th ST over Stream | Fair | 22.0 ft | 41 | 1994 |
| 330th ST over Stony Creek | Fair | 125.0 ft | 41 | 1965 |
| FM 390th ST over Little Sioux River | Fair | 418.0 ft | 40 | 1986 |
| 390th ST over Overflow Little Sioux R | Fair | 128.0 ft | 40 | 1955 |
| FM 160th AVE over Ocheyedan River | Fair | 128.0 ft | 40 | 1981 |
| FM 320th ST over Drainage Dist #37 Ditch | Fair | 78.1 ft | 34 | 1978 |
| 470th ST over Montgomery Creek | Fair | 29.9 ft | 30 | 1998 |
| 380th ST over Prairie Ck | Fair | 78.1 ft | 30 | 1977 |
| 370th AVE over Stream | Fair | 22.0 ft | 30 | 2000 |
| 310th ST over Meadow Creek | Fair | 34.1 ft | 30 | 1999 |
| 290th ST over Little Sioux River | Fair | 173.9 ft | 30 | 1978 |
| 225th ST over Willow Creek | Fair | 103.0 ft | 26 | 1978 |
| 110th AVE over Henry Creek | Fair | 22.0 ft | 26 | 1965 |
| 270th ST over Stony Creek | Fair | 103.0 ft | 26 | 1976 |
| 180th AVE over Prairie Creek | Fair | 24.0 ft | 21 | 2008 |
| 310th ST over Little Muddy Creek | Fair | 24.9 ft | 21 | 1991 |
| FM 320th AVE over Dd #22 | Fair | 29.9 ft | 20 | 2003 |
| 270th ST over Big Meadow Ck | Fair | 90.9 ft | 20 | 1976 |
| 450th ST over Stream | Fair | 30.8 ft | 15 | 1949 |
| 330th AVE over D.d#60 | Fair | 21.0 ft | 15 | 2011 |
| 290th ST over Stoney Creek | Fair | 67.9 ft | 15 | 2004 |
| 420th ST over Elk Creek | Fair | 54.1 ft | 11 | 1978 |
| 420th ST over Willow Creek | Fair | 78.1 ft | 11 | 1978 |
| 300th AVE over Stream | Fair | 24.0 ft | 11 | 2000 |
| US 18 & 71 over Little Sioux River | Good | 459.0 ft | 16,900 | 2006 |
| US 71 over Prairie Creek | Good | 100.7 ft | 4,770 | 2017 |
| US 18 over Little Sioux River | Good | 538.1 ft | 4,170 | 2010 |
| US 18 over Ocheydon River Overflow | Good | 83.0 ft | 2,990 | 1987 |
| US 18 over Ocheyedan River | Good | 150.9 ft | 2,990 | 2014 |
| FM 240th AVE over Little Sioux River | Good | 318.9 ft | 2,623 | 1991 |
| 200 AVE over Ocheyedan River | Good | 243.1 ft | 2,273 | 2012 |
| FM 190th AVE over Ocheyedan River | Good | 243.1 ft | 1,277 | 2002 |
| N18 340th AVE over Lost Island Lake | Good | 58.1 ft | 838 | 2021 |
| Ia 10 over Drainage Ditch | Good | 24.9 ft | 700 | 1976 |
| M50 240th AVE over Prairie Creek | Good | 37.1 ft | 447 | 2022 |
| FM 440th ST over Willow Creek | Good | 120.1 ft | 399 | 2009 |
| B63 (480th St) over Montgomery Creek | Good | 35.4 ft | 369 | 2014 |
| N18 330th AVE over Pool-mud Lake | Good | 29.9 ft | 350 | 2018 |
| B53 5th ST over Little Sioux River | Good | 422.6 ft | 339 | 2021 |
| N14 310th AVE over Elk Creek | Good | 28.9 ft | 264 | 2022 |
| FM 430th ST over Elk Creek | Good | 30.8 ft | 240 | 2004 |
| FM 240th AVE over Little Muddy Creek | Good | 78.1 ft | 240 | 1987 |
| 225th AVE over Prairie Creek | Good | 35.1 ft | 223 | 2022 |
| FM 170th AVE over Small Waterway | Good | 20.0 ft | 219 | 1993 |
| 1st ST South over Pickeral Run | Good | 112.9 ft | 171 | 2021 |
| Local RD over Small | Good | 22.0 ft | 112 | 2003 |
| 330th ST over Little Meadow Creek | Good | 75.1 ft | 103 | 1975 |
| 340th ST over Little Meadow Creek | Good | 86.9 ft | 103 | 1981 |
| 330th ST over Big Meadow Creek | Good | 89.9 ft | 81 | 1990 |
| 310th ST over Little Sioux River | Good | 223.1 ft | 81 | 1986 |
| 150th AVE over Stoney Creek | Good | 116.1 ft | 81 | 1994 |
| 150th AVE over Stream | Good | 22.0 ft | 62 | 2000 |
| Pk 658(wanata) over Little Sioux River | Good | 207.0 ft | 58 | 1972 |
| 390th ST over Prairie Creek | Good | 24.0 ft | 50 | 2008 |
| FM 190th AVE over Little Sioux River | Good | 204.1 ft | 50 | 1992 |
| 420th ST over Stream | Good | 21.0 ft | 46 | 2005 |
| 340th ST over Pickerel Run | Good | 78.1 ft | 46 | 1991 |
| 140th AVE over Stony Creek | Good | 128.0 ft | 46 | 1978 |
| 370th ST over Stream | Good | 23.0 ft | 41 | 1998 |
| 160th AVE over Spring Creek | Good | 128.0 ft | 40 | 1981 |
| 100th AVE over Willow Creek | Good | 29.9 ft | 35 | 1996 |
| 290th ST over Meadow Creek | Good | 56.1 ft | 35 | 2002 |
| FM 160th AVE over Stony Creek | Good | 113.8 ft | 34 | 1990 |
| 495th ST over Little Sioux River | Good | 263.1 ft | 30 | 2005 |
| 260th AVE over Big Meadow Creek | Good | 78.1 ft | 30 | 2000 |
| 340th ST over Ocheyedan River | Good | 140.1 ft | 30 | 2008 |
| 270th AVE over Montgomery Creek | Good | 75.1 ft | 26 | 1993 |
| 300th ST over Stoney Creek | Good | 117.1 ft | 26 | 2005 |
| 310th ST over Stony Creek | Good | 112.9 ft | 26 | 2020 |
| 460th ST over Stream | Good | 20.0 ft | 21 | 2005 |
| 390th ST over Prarie Creek | Good | 20.0 ft | 21 | 2006 |
| 320th AVE over Stream | Good | 24.0 ft | 21 | 2007 |
| 300th ST over Ocheydan River | Good | 143.4 ft | 21 | 2015 |
| 430th ST over Willow Creek | Good | 73.2 ft | 15 | 2020 |
| 345th ST over Stream | Good | 29.9 ft | 15 | 2002 |
| 120th AVE over Willow Creek | Good | 24.0 ft | 11 | 2011 |
| 400th ST over Willow Creek | Good | 24.0 ft | 11 | 2011 |
| 200th AVE over Prairie Creek | Good | 33.1 ft | 11 | 2003 |
| 300th ST over Little Sioux River | Good | 191.9 ft | 11 | 1996 |
| SR M22 over Side Ditch | Good | 26.9 ft | 10 | 1959 |
| 400th ST over Stream | Good | 21.0 ft | 5 | 2014 |
| 390th ST over Willow Creek | Good | 20.0 ft | 5 | 2008 |