| Ia 2 over East Fork Grand River | 1985 | 1,750 | Fair |
| Ia 2 over Lotts Creek | 1985 | 1,750 | Good |
| Ia 2 over Walnut Creek | 1988 | 1,750 | Good |
| US 169 over Stream | 1938 | 1,730 | Fair |
| US 169 over Walnut Creek | 1985 | 1,730 | Fair |
| Ia 2 over Drainage Ditch | 1976 | 1,550 | Good |
| Ia 2 over E Fork Lotts Creek | 1985 | 1,550 | Good |
| Ia 25 over Stream | 1934 | 1,250 | Fair |
| Ia 2 over W Fork of Grand River | 1976 | 1,180 | Good |
| Ia 2 over Drainage Ditch | 1988 | 1,150 | Good |
| US 169 over Drainage Ditch | 1937 | 1,020 | Good |
| US 169 over Stream | 1977 | 1,020 | Good |
| US 169 over Sun Valley Creek | 1994 | 1,020 | Good |
| Ia 2 over Platte River | 1975 | 870 | Good |
| Hwy 66 over Crooked Creek | 1985 | 737 | Fair |
| Hwy 66 over Small Natural Stream | 1935 | 737 | Poor |
| Hwy 66 over W.fk Grand River | 1935 | 737 | Poor |
| US 169 over Middle Fork Grand River | 2021 | 500 | Good |
| FM over Platte River | 1969 | 379 | Fair |
| FM over Stream | 2005 | 379 | Fair |
| US 169 over Middle Fork Grand River | 1989 | 370 | Fair |
| FM over E Big Creek | 1973 | 349 | Fair |
| FM over Stream | 1968 | 349 | Poor |
| FM over E Fork Grand River | 2003 | 338 | Fair |
| Old Ia Hwy 25 over Small Stream | 1934 | 289 | Fair |
| Old Ia Hwy 25 over Small Stream | 1934 | 289 | Poor |
| P14 over Platte River | 2018 | 289 | Good |
| FM over Grand River | 1973 | 270 | Fair |
| FM over Lotts Creek | 1973 | 270 | Fair |
| FM over Small Stream | 2001 | 270 | Fair |
| FM over W Fk Grand River | 1979 | 270 | Fair |
| FM over Walnut Creek | 1992 | 270 | Fair |
| FM over Walnut Creek | 1992 | 270 | Good |
| FM over W Fork Grand River | 1956 | 219 | Poor |
| FM over Sun Valley Creek | 1994 | 190 | Fair |
| FM over Trail | 1940 | 190 | Poor |
| FM over W Fk Grand River | 1979 | 190 | Poor |
| 210TH Street over Small | 1945 | 170 | Fair |
| FM over Stream | 1953 | 170 | Poor |
| FM over Lotts Creek | 1966 | 159 | Fair |
| FM over Crooked Creek | 2001 | 120 | Good |
| FM over E Fork Grand River | 1957 | 120 | Poor |
| FM over Fletchall Creek | 1993 | 120 | Fair |
| FM over Plum Creek | 1954 | 120 | Poor |
| FM over Plum Creek | 1954 | 120 | Poor |
| FM over Stream | 1976 | 120 | Fair |
| FM over W Fork Grand | 1967 | 120 | Poor |
| FM over Walnut Creek | 1991 | 110 | Good |
| Local over Stream | 1998 | 110 | Fair |
| J13 Rinngoldunion over Stream | 2018 | 100 | Good |
| FM over Branch of Lotts Creek | 2009 | 89 | Good |
| FM over Branch of Lotts Creek | 1993 | 89 | Fair |
| FM over Gooseberry Creek | 1993 | 79 | Good |
| FM over Platte River | 1955 | 79 | Poor |
| County Rd over Platte River | 1983 | 75 | Good |
| FM over Branch Crooked Creek | 1957 | 71 | Poor |
| FM over Stream | 1941 | 71 | Poor |
| FM over W Fork Grand River | 1985 | 71 | Good |
| 210TH Ave over West Fork Grand River | 1957 | 67 | Fair |
| FM over Crooked Creek | 1992 | 60 | Good |
| FM over Platte River | 1955 | 60 | Poor |
| FM over Sand Creek | 1939 | 60 | Poor |
| FM over Stream | 1991 | 60 | Fair |
| FM over W Fork Grand River | 1950 | 60 | Poor |
| Local over W Fk Grand River | 1930 | 60 | Poor |
| Local over W Fork of Grand River | 2009 | 60 | Good |
| P68 over Stream | 2004 | 60 | Fair |
| FM over E Fork Grand River | 1957 | 50 | Fair |
| FM over Sun Valley Creek | 1961 | 50 | Poor |
| J20 130TH St over Stream | 2020 | 50 | Good |
| Local over Crooked Creek | 1957 | 50 | Fair |
| 130TH St over Plum Creek | 2011 | 45 | Good |
| 310TH St over Fletchall Creek | 2021 | 45 | Good |
| Local over Elk Creek | 1986 | 45 | Fair |
| Local over Mid Fk Grand River | 1988 | 45 | Poor |
| 270TH St over Middle Fork Grand River | 2020 | 40 | Good |
| FM over Platte River | 1962 | 40 | Poor |
| FM over Sand Creek | 1986 | 40 | Fair |
| Local over Stream | 1969 | 40 | Poor |
| Local over Stream | 1967 | 40 | Poor |
| Local over Stream | 1948 | 40 | Poor |
| Local over Wolf Creek | 1936 | 40 | Fair |
| FM over Gooseberry Creek | 2009 | 35 | Good |
| 190TH St over Wolf Creek | 2023 | 34 | Good |
| 200TH Street over Brush Creek | 2021 | 34 | Good |
| FM over Stream | 1963 | 34 | Fair |
| FM over W Fork Grand River | 1966 | 34 | Fair |
| Local over Small Stream | 1920 | 34 | Fair |
| Local over Stream | 1947 | 34 | Poor |
| Local over Stream | 1975 | 34 | Poor |
| Local over Stream | 1963 | 34 | Poor |
| Local over Sun Valley Creek | 1975 | 34 | Poor |
| Local over W Fork Grand River | 1986 | 34 | Good |
| Local over West Fork Grand River | 1984 | 34 | Fair |
| 190TH St over Crooked Creek | 2023 | 29 | Good |
| 255TH Ave over Stream | 2017 | 29 | Good |
| FM over E Fork Grand River | 1957 | 29 | Poor |
| FM over Lotts Creek | 2000 | 29 | Good |
| FM over Platte River | 1961 | 29 | Fair |
| Local over Br Middle Fk Grand River | 1940 | 29 | Poor |
| Local over E Fk Grand River | 1989 | 29 | Fair |
| Local over Lotts Creek | 1965 | 29 | Fair |
| Local over Platte River | 1955 | 29 | Poor |
| Local over Stream | 2001 | 29 | Good |
| Local over Stream | 1930 | 29 | Fair |
| Local over Stream | 1993 | 29 | Poor |
| Local over Stream | 1978 | 29 | Fair |
| Local over Stream | 1948 | 29 | Poor |
| Local over Stream | 1940 | 29 | Poor |
| Local over Turkey Creek | 2009 | 29 | Good |
| Ringgold-union St over E Fork Grand River | 2023 | 29 | Good |
| 190TH St over Turkey Creek | 2023 | 26 | Good |
| 250TH St over Ruder Creek | 2014 | 26 | Good |
| Local over E Fk Grand River | 1961 | 26 | Poor |
| Local over East Big Creek | 1951 | 26 | Poor |
| Local over Gooseberry Creek | 2006 | 26 | Good |
| Local over Platte River | 1969 | 26 | Fair |
| Local over Stream | 1953 | 26 | Fair |
| Local over Stream | 2003 | 26 | Fair |
| Local over W Fk Grand River | 1996 | 26 | Good |
| Local over Walnut Creek | 2006 | 26 | Good |
| P20 (125TH Ave) over Stream | 2013 | 26 | Good |
| SR P54 250TH Av over Stream | 2011 | 26 | Good |
| FM over Lotts Creek | 1941 | 25 | Fair |
| 200TH St over Gooseberry Creek | 1940 | 20 | Poor |
| FM over E Fork Grand River | 1959 | 20 | Poor |
| Local Rd over Lotts Creek | 1900 | 20 | Poor |
| Local over Gooseberry Creek | 1965 | 20 | Poor |
| Local over M Fk Grand River | 1981 | 20 | Poor |
| Local over M Fk Grand River | 1963 | 20 | Poor |
| Local over Stream | 1992 | 20 | Fair |
| Local over Stream | 1998 | 20 | Good |
| Local over Stream | 1999 | 20 | Good |
| Local over Stream | 1988 | 20 | Poor |
| Local over Stream | 1946 | 20 | Fair |
| Local over Stream | 1960 | 20 | Poor |
| Local over Unnamed Stream | 1957 | 20 | Poor |
| Local over Wolf Creek | 1940 | 20 | Poor |
| 180TH Ave over Plum Creek | 2020 | 15 | Good |
| 260TH St over Ruder Creek | 2007 | 15 | Good |
| FM over E Fk Grand River | 1958 | 15 | Poor |
| FM over E Fork Grand River | 1961 | 15 | Fair |
| Local over E Fk Grand River | 1970 | 15 | Poor |
| Local over Goosebury Creek | 1956 | 15 | Fair |
| Local over Lotts Creek | 1963 | 15 | Fair |
| Local over Lotts Creek | 1990 | 15 | Fair |
| Local over Lotts Creek | 1978 | 15 | Fair |
| Local over Lotts Creek | 1994 | 15 | Good |
| Local over Sand Creek | 1972 | 15 | Fair |
| Local over Sand Creek | 1958 | 15 | Poor |
| Local over Small Creek | 1982 | 15 | Poor |
| Local over Small Stream | 1990 | 15 | Fair |
| Local over Stream | 1954 | 15 | Fair |
| Local over Stream | 1993 | 15 | Poor |
| Local over Stream | 1941 | 15 | Fair |
| Local over Stream | 1932 | 15 | Fair |
| Local over Stream | 1916 | 15 | Poor |
| Local over Stream | 1930 | 15 | Poor |
| Local over Stream | 1930 | 15 | Poor |
| Local over Turkey Creek | 2004 | 15 | Fair |
| Local over Walnut Creek | 1956 | 15 | Poor |
| 115TH St over Trib to Sand Creek | 2021 | 11 | Good |
| FM over East Creek | 1958 | 11 | Poor |
| FM over Lotts Creek | 1957 | 11 | Poor |
| Local over Crooked Creek | 1950 | 11 | Poor |
| Local over E Fk Grand River | 1957 | 11 | Poor |
| Local over E Fk Grand River | 1958 | 11 | Fair |
| Local over Lotts Creek | 1961 | 11 | Poor |
| Local over Lotts Creek | 1940 | 11 | Poor |
| Local over M Fk Grand River | 2009 | 11 | Good |
| Local over Plum Creek | 1997 | 11 | Good |
| Local over Small Stream | 1951 | 11 | Poor |
| Local over Stream | 1994 | 11 | Fair |
| Local over Stream | 1959 | 11 | Poor |
| Local over Stream | 1949 | 11 | Poor |
| Local over Stream | 2002 | 11 | Fair |
| Local over Stream | 1957 | 11 | Poor |
| Local over Stream | 1993 | 11 | Good |
| Local over Stream | 1996 | 11 | Fair |
| Local over Stream | 1996 | 11 | Good |
| Local over Stream | 1943 | 11 | Poor |
| Local over Stream | 1941 | 11 | Fair |
| Local over Stream | 1957 | 11 | Poor |
| Local over W Fk Grand River | 2005 | 11 | Good |
| Local over Walnut Creek | 1964 | 11 | Poor |
| Local over Walnut Creek | 1946 | 11 | Fair |
| J20 130TH St over Side Ditch-sunvalleycree | 2002 | 10 | Good |
| 300TH Ave over Lotts Creek | 2013 | 5 | Good |
| 300TH Street over Stream | 2011 | 5 | Good |
| 310TH Ave over Stream | 2017 | 5 | Good |
| FM over Stream | 1955 | 5 | Fair |
| FM over Stream | 1955 | 5 | Poor |
| Local over Crooked Creek | 1952 | 5 | Fair |
| Local over E Big Creek | 1958 | 5 | Poor |
| Local over E Fk Grand River | 1962 | 5 | Poor |
| Local over E Fk Grand River | 1940 | 5 | Poor |
| Local over E Fk Grand River | 1936 | 5 | Fair |
| Local over E Fork Grand River | 1969 | 5 | Poor |
| Local over Gooseberry Creek | 1956 | 5 | Poor |
| Local over Lotts Creek | 1952 | 5 | Poor |
| Local over Lotts Creek | 1949 | 5 | Poor |
| Local over Plum Creek | 1997 | 5 | Good |
| Local over Stream | 1953 | 5 | Poor |
| Local over Stream | 1949 | 5 | Poor |
| Local over Stream | 1953 | 5 | Poor |
| Local over Stream | 1936 | 5 | Fair |
| Local over Stream | 1946 | 5 | Poor |
| Local over Stream | 1952 | 5 | Poor |
| Local over Stream | 1956 | 5 | Poor |
| Local over Stream | 1954 | 5 | Poor |
| Local over Stream | 1954 | 5 | Poor |
| Local over Stream | 1950 | 5 | Poor |
| Local over Sun Valley Creek | 2003 | 5 | Fair |
| Local over Sun Valley Creek | 1980 | 5 | Poor |
| Local over W Fk Grand River | 1940 | 5 | Poor |