| Ave C over West Boyer River | 1985 | 7,347 | Fair |
| Ave C over Cc RR | 1999 | 7,158 | Fair |
| US 30 over Drainage Ditch | 1958 | 4,670 | Fair |
| US 30 & 59 over East Boyer River | 1962 | 4,500 | Fair |
| US 30 & 59 over over UP RR | 1962 | 4,500 | Fair |
| NB US 59 over Boyer River | 1967 | 4,400 | Fair |
| NB US 59 over over Cc RR | 1967 | 4,400 | Fair |
| US 30 & 59 over East Boyer River | 1962 | 4,400 | Fair |
| US 30 & 59 over over UP RR | 1962 | 4,400 | Fair |
| SB US 59 over Boyer River | 1967 | 4,300 | Fair |
| SB US 59 over over Cc RR | 1967 | 4,300 | Fair |
| US 59 & Ia 141 over Drainage Ditch | 1986 | 4,130 | Good |
| US 30 over Rocky Run | 2023 | 4,080 | Good |
| US 30 over Drainage Ditch | 1965 | 4,000 | Fair |
| Ia 39 over Buffalo Creek | 1977 | 3,550 | Fair |
| US 30 over Boyer River | 1959 | 3,520 | Fair |
| US 30 over Willow Creek | 1958 | 3,520 | Fair |
| US 30 over Stream | 1959 | 3,480 | Fair |
| US 30 over East Boyer River | 1997 | 3,270 | Fair |
| US 30 over over UP RR | 1972 | 3,270 | Fair |
| US 30 over Miller Creek | 1965 | 3,230 | Fair |
| US 59 & Ia 141 over over Abandon RR | 1970 | 3,230 | Fair |
| US 30 over Drainage Ditch | 2015 | 3,180 | Good |
| US 30 over Flasher Creek | 1965 | 3,180 | Fair |
| US 30 over N. Grove Creek | 1994 | 3,180 | Good |
| US 59 over East Soldier River | 1948 | 3,120 | Fair |
| US 30 over Boyer River | 1959 | 3,020 | Fair |
| US 30 over Scatter Creek | 1925 | 3,020 | Fair |
| US 59 over Drainage Ditch | 1968 | 2,830 | Fair |
| Ia 39 over Spangler Creek | 1985 | 2,710 | Fair |
| Ia 39 over Otter Creek | 1951 | 2,580 | Fair |
| Ia 141 over Elk Creek | 1990 | 1,960 | Good |
| FM Rt M-36 over East Boyer River | 1958 | 1,951 | Poor |
| Ia 141 over Emigrant Creek | 1992 | 1,890 | Fair |
| Ia 141 over Emigrant Creek | 1992 | 1,890 | Good |
| Ia 141 over Paradise Creek | 1991 | 1,890 | Fair |
| Ia 141 over Paradise Creek | 1992 | 1,890 | Good |
| Ia 141 over Stream | 1977 | 1,890 | Fair |
| Donna Reed Dr over over UP RR | 1935 | 1,846 | Poor |
| Ia 141 over Drainage Ditch | 1975 | 1,570 | Fair |
| Ia 141 over W.fork Nishnabotna River | 1988 | 1,570 | Fair |
| Ia 39 over East Otter Creek | 1951 | 1,540 | Fair |
| Ia 141 over Drainage Ditch | 1977 | 1,520 | Good |
| Ia 141 over East Soldier River | 1953 | 1,520 | Fair |
| Ia 141 over Drainage Ditch | 1977 | 1,490 | Fair |
| S Main St over East Boyer River | 1995 | 1,442 | Good |
| FM over Hickey Creek | 1963 | 816 | Fair |
| FM over W Fk W Nishnabotna River | 1963 | 816 | Fair |
| E16 D Ave over Small Stream | 2024 | 639 | Good |
| FM over Small Stream | 1967 | 627 | Poor |
| FM over Soldier River | 1957 | 627 | Good |
| FM over Small Stream | 1959 | 593 | Fair |
| E 16 D Ave over Big Creek | 2020 | 577 | Good |
| FM over Otter Creek | 1966 | 577 | Good |
| Maple St over Middle Soldier River | 2008 | 518 | Good |
| L51 150TH St over East Soldier River | 2023 | 499 | Good |
| FM over Porter Creek | 1970 | 488 | Fair |
| FM over Beaman Creek | 1958 | 468 | Good |
| FM over Boyer River | 1970 | 459 | Fair |
| FM over Wheeler Creek | 1968 | 459 | Fair |
| Co Rd over East Boyer River | 1958 | 443 | Poor |
| FM over Miller Creek | 1958 | 368 | Fair |
| FM over Middle Willow Creek | 1967 | 358 | Good |
| FM over Small Stream | 1950 | 358 | Fair |
| L51 140TH St over Willow Creek | 2015 | 358 | Good |
| FM over Buck Creek | 1962 | 349 | Fair |
| FM over Griffin Creek | 1962 | 349 | Fair |
| FM over Small Stream | 1962 | 349 | Fair |
| M64 380TH St over Small Stream | 1992 | 349 | Fair |
| FM over King Creek | 2007 | 309 | Good |
| FM over King Creek | 2007 | 309 | Good |
| Main St over East Boyer River | 1913 | 303 | Poor |
| FM over Boyer River | 1994 | 249 | Good |
| FM over Soldier River | 1971 | 219 | Good |
| FM over Trinkle Creek | 1977 | 219 | Good |
| FM over Welch Creek | 1991 | 219 | Good |
| FM over Boyer River | 1972 | 210 | Good |
| FM over Paradise Creek | 1972 | 210 | Fair |
| Morris St over King Creek | 1968 | 195 | Fair |
| FM over W Fk W Nishnabotna River | 1990 | 190 | Good |
| FM over Hocket Creek | 2004 | 180 | Good |
| FM over Malony Creek | 1985 | 180 | Fair |
| FM over Small Stream | 2004 | 180 | Good |
| FM over Small Stream | 1985 | 180 | Good |
| FM over W Fk W Nishnabotna River | 1975 | 180 | Fair |
| FM over Hockett Creek | 1980 | 170 | Good |
| FM over W Fk W Nishnabotna River | 2002 | 170 | Good |
| John St over W Fk W Nishnabotna River | 1997 | 161 | Good |
| Grace St over Boyer River | 1997 | 150 | Good |
| FM over Boyer River | 1975 | 131 | Good |
| Local over East Boyer River | 1967 | 125 | Poor |
| Local over Bear Creek | 1974 | 123 | Good |
| Co Rd over Boyer River | 1949 | 121 | Fair |
| FM over W Fk W Nishnabotna Rvr | 1969 | 120 | Good |
| Local over Paradise Creek | 1988 | 113 | Good |
| FM over East Boyer River | 1954 | 110 | Fair |
| FM over Middle Soldier River | 2007 | 110 | Good |
| Birch Ave over East Soldier River | 1999 | 104 | Good |
| Local over Boyer River | 2001 | 91 | Good |
| Local over East Boyer River | 2006 | 91 | Good |
| Local over Emmigrant Creek | 1976 | 91 | Good |
| E35 L Ave over Miller Creek | 2015 | 89 | Good |
| FM over Coon Creek | 1958 | 89 | Good |
| FM over East Boyer River | 1958 | 89 | Fair |
| FM over Small Stream | 1940 | 89 | Fair |
| 370TH St over Elk Creek | 2016 | 82 | Good |
| E 25 H Ave over East Boyer River | 2022 | 82 | Good |
| E Ave over Otter Creek | 2015 | 82 | Good |
| Local over Buffalo Creek | 1939 | 82 | Fair |
| Local over Norsky Creek | 2001 | 82 | Good |
| Local over Small Stream | 1994 | 82 | Good |
| Local over Walnut Creek | 1958 | 82 | Fair |
| FM over Rocky Run | 1974 | 79 | Fair |
| L Ave over Rocky Run | 2024 | 73 | Good |
| 340TH St over Honey Creek | 2012 | 72 | Good |
| Local over Coon Creek | 1978 | 72 | Fair |
| Local over Neddermeyer Creek | 2010 | 72 | Good |
| FM over Big Creek | 1976 | 71 | Good |
| FM over Clark Creek | 1958 | 71 | Fair |
| FM over East Soldier River | 1986 | 71 | Good |
| M38 Rocky Run over Rocky Run | 2005 | 71 | Good |
| Local over Small Stream | 2003 | 63 | Good |
| Local over Boyer River | 1958 | 62 | Good |
| Local over East Soldier River | 1990 | 62 | Good |
| Local over Hannah Creek | 1991 | 62 | Good |
| Local over Otter Creek | 1977 | 62 | Fair |
| Local over Small Stream | 1937 | 62 | Fair |
| Local over Small Stream | 1962 | 62 | Good |
| Local over Trinkle Creek | 1958 | 62 | Fair |
| FM over Otter Creek | 1989 | 60 | Good |
| FM over Small Stream | 1958 | 60 | Good |
| Local over Miller Creek | 1981 | 58 | Poor |
| Co Rd over Small Stream | 1960 | 54 | Poor |
| FM over Emigrant Creek | 1986 | 51 | Good |
| Local over Coon Creek | 1996 | 51 | Fair |
| Local over Malony Creek | 2007 | 51 | Good |
| Local over Small Stream | 1996 | 51 | Fair |
| E53 S Ave over Coon Creek | 2016 | 50 | Good |
| FM over Picayne Creek | 1981 | 50 | Good |
| FM over Small Stream | 1975 | 50 | Good |
| FM over Small Stream | 2010 | 50 | Good |
| FM over Small Stream | 1941 | 50 | Fair |
| FM over Welch Creek | 1992 | 50 | Good |
| FM over Willow Creek | 1988 | 50 | Good |
| Local over Small Stream | 1965 | 50 | Fair |
| Local over Trib East Soldier River | 2010 | 50 | Good |
| Local over Nishnabotna River | 1953 | 46 | Fair |
| Local over Small Stream | 2007 | 46 | Fair |
| Local over W Fk W Nishnabotna River | 1944 | 46 | Poor |
| FM over Beaman Creek | 1988 | 45 | Good |
| FM over Boyer River | 2002 | 45 | Good |
| Deloit Blvd over Small Stream | 2022 | 42 | Good |
| Local over Small Stream | 1953 | 42 | Fair |
| Local over Buck Creek | 1961 | 41 | Fair |
| Local over East Soldier River | 2010 | 41 | Fair |
| Local over Elk Creek | 2005 | 41 | Good |
| Local over Malony Creek | 2006 | 41 | Good |
| Local over Soldier River | 1951 | 41 | Poor |
| U Ave over Hickey Creek | 2011 | 41 | Good |
| E46 O Ave over Willow Creek | 2017 | 40 | Good |
| FM over Benton Creek | 2010 | 40 | Good |
| FM over East Boyer River | 1970 | 40 | Fair |
| FM over East Boyer River | 1994 | 40 | Good |
| FM over Middle Willow Creek | 1954 | 40 | Fair |
| FM over Middle Willow Creek | 1958 | 40 | Fair |
| FM over Neddemeyer Creek | 2005 | 40 | Good |
| FM over Otter Creek | 1976 | 40 | Good |
| FM over Rocky Run | 2004 | 40 | Good |
| FM over Soldier River | 1957 | 40 | Poor |
| 165TH St over Welch Creek | 2020 | 36 | Good |
| Railroad St over Buck Creek | 2023 | 36 | Good |
| 370TH St over Small Stream | 2012 | 35 | Fair |
| 390TH St over Small Stream | 2007 | 35 | Fair |
| B Ave over Wheeler Creek | 2013 | 35 | Good |
| G Ave over Hannah Creek | 2022 | 35 | Good |
| Local over Benton Creek | 1974 | 35 | Good |
| Local over Small Stream | 1965 | 35 | Fair |
| Local over W Fk W Nishnabotna River | 1949 | 35 | Poor |
| Local over Willow Creek | 1961 | 35 | Poor |
| FM over Walnut Creek | 1958 | 34 | Fair |
| Local over East Soldier River | 1957 | 34 | Poor |
| Local over Middle Willow Creek | 2009 | 34 | Fair |
| 120TH St over East Soldier River | 2016 | 30 | Good |
| 290TH St over Norsky Creek | 2015 | 30 | Good |
| 390TH St over Flemming Creek | 2016 | 30 | Good |
| B Ave over Beaman Creek | 2019 | 30 | Good |
| Local over Beaman Creek | 1951 | 30 | Fair |
| Local over Beaver Creek | 1975 | 30 | Good |
| Local over Beaver Creek | 2008 | 30 | Good |
| Local over Big Creek | 1949 | 30 | Poor |
| Local over Boyer River | 1971 | 30 | Poor |
| Local over East Soldier River | 1945 | 30 | Fair |
| Local over Hockett Creek | 1977 | 30 | Fair |
| Local over Miller Creek | 2003 | 30 | Fair |
| Local over Otter Creek | 2009 | 30 | Good |
| Local over Paradise Creek | 1978 | 30 | Fair |
| Local over Paradise Creek | 1983 | 30 | Fair |
| Local over Tucker Creek | 1960 | 30 | Fair |
| Local over W Fk W Nishnabotna River | 1945 | 30 | Poor |
| Local over W Fork Nishnabotna River | 2004 | 30 | Fair |
| Local over Willow Creek | 2001 | 30 | Fair |
| FM over Big Creek | 1958 | 29 | Fair |
| FM over Elk Creek | 1950 | 29 | Fair |
| 170TH St over Emigrant Creek | 2000 | 26 | Good |
| 180TH St over Beaver Creek | 2018 | 26 | Poor |
| 360TH St over Malony Creek | 2021 | 26 | Good |
| A Ave over Wheeler Creek | 2013 | 26 | Fair |
| B Ave over Porter Ceeek | 2019 | 26 | Good |
| F Ave over Big Creek | 2017 | 26 | Good |
| FM over Beaver Creek | 2006 | 26 | Good |
| FM over Big Creek | 1958 | 26 | Fair |
| FM over Buck Creek | 1994 | 26 | Good |
| G Ave over Big Creek | 2018 | 26 | Good |
| I Ave over Middle Soldier River | 2022 | 26 | Good |
| K Ave over Middle Soldier River | 2014 | 26 | Good |
| Local over Beaver Creek | 1962 | 26 | Fair |
| Local over Buck Creek | 2007 | 26 | Good |
| Local over King Creek | 1995 | 26 | Fair |
| Local over Small Stream | 1962 | 26 | Poor |
| Local over Small Stream | 1958 | 26 | Fair |
| Local over South Willow Creek | 2004 | 26 | Good |
| Local over W Fk W Nishnabotna River | 1938 | 26 | Good |
| Local over Willow Creek | 2005 | 26 | Good |
| W Ave over Willow Creek | 2023 | 26 | Good |
| W Avenue over Small Stream | 1958 | 26 | Fair |
| 200TH St over Small Stream | 2021 | 21 | Good |
| 320TH St over Creek | 1960 | 21 | Good |
| B Ave over Small Stream | 2013 | 21 | Fair |
| E46 200TH St over Paradise Creek | 2017 | 21 | Good |
| J Ave over Middle Soldier River | 2018 | 21 | Good |
| Local over Beaver Creek | 1971 | 21 | Fair |
| Local over Coon Creek | 1998 | 21 | Fair |
| Local over East Soldier River | 2010 | 21 | Good |
| Local over Emigrant Creek | 1985 | 21 | Fair |
| Local over Hockett Creek | 1900 | 21 | Fair |
| Local over Otter Creek | 1991 | 21 | Fair |
| Local over Small Drainage | 1976 | 21 | Fair |
| Local over Small Stream | 2001 | 21 | Fair |
| Local over Small Stream | 2004 | 21 | Fair |
| Local over Small Stream | 1965 | 21 | Poor |
| Local over Small Stream | 1962 | 21 | Fair |
| Local over Soldier River | 1951 | 21 | Fair |
| Local over Trinkle Creek | 1968 | 21 | Fair |
| Local over W Fk W Nishnabotna River | 1987 | 21 | Poor |
| Local over W Fk W Nishnabotna Rvr | 2004 | 21 | Fair |
| FM over Hockett Creek | 2006 | 20 | Fair |
| Local over East Soldier River | 1977 | 20 | Good |
| 250TH St over Big Creek | 2011 | 15 | Good |
| 350TH St over Beaman Creek | 2012 | 15 | Good |
| C Ave over Small Stream | 2021 | 15 | Good |
| Local over Beaman Creek | 1999 | 15 | Fair |
| Local over Boyer River | 1980 | 15 | Poor |
| Local over Buffalo Creek | 1991 | 15 | Fair |
| Local over Buffalo Creek | 1962 | 15 | Fair |
| Local over East Soldier River | 2008 | 15 | Fair |
| Local over Middle Soldier River | 2002 | 15 | Fair |
| Local over Miller Creek | 2008 | 15 | Fair |
| Local over Small Stream | 2005 | 15 | Fair |
| Local over Small Stream | 1996 | 15 | Fair |
| Local over Small Stream | 2006 | 15 | Fair |
| Local over South Willow Creek | 1976 | 15 | Fair |
| M56 370TH St over Miller Creek | 2017 | 15 | Good |
| R Ave over W Fk W Nishnabotna River | 2023 | 15 | Good |
| T Ave over Boeck Creek | 2005 | 15 | Good |
| W Ave over Small Stream | 2019 | 15 | Good |
| 120TH Street over Middle Willow Creek | 2023 | 11 | Fair |
| 140TH St over Middle Soldier River | 2014 | 11 | Good |
| 360TH St over Hockett Creek | 2019 | 11 | Good |
| FM over East Soldier | 2009 | 11 | Good |
| FM over Middle Willow Creek | 1950 | 11 | Fair |
| FM over South Willow Creek | 2006 | 11 | Good |
| Local over Bear Creek | 1993 | 11 | Fair |
| Local over Beaver Creek | 2006 | 11 | Good |
| Local over Boyer River | 1971 | 11 | Poor |
| Local over Buck Creek | 1973 | 11 | Fair |
| Local over Coon Creek | 1973 | 11 | Fair |
| Local over East Soldier River | 1940 | 11 | Fair |
| Local over Hay Creek | 1999 | 11 | Fair |
| Local over Hockett Creek | 1991 | 11 | Fair |
| Local over Middle Soldier River | 2007 | 11 | Good |
| Local over Miller Creek | 2002 | 11 | Fair |
| Local over Small Stream | 1965 | 11 | Fair |
| Local over Small Stream | 1983 | 11 | Fair |
| Local over Small Stream | 1900 | 11 | Fair |
| Local over W Fk W Nishnabotna River | 1998 | 11 | Good |
| Local over W Fk W Nishnabotna Rvr | 1964 | 11 | Fair |
| Local over Walnut Creek | 1956 | 11 | Fair |
| Local over Welch Creek | 1999 | 11 | Fair |
| N Ave over Paradise Creek | 2021 | 11 | Good |
| P Ave over Small Stream | 2000 | 11 | Fair |
| R Ave over Willow Creek | 2022 | 11 | Good |
| 210TH St over Small Stream | 2022 | 10 | Good |
| N Pine Ave over Emigrant Creek | 1966 | 10 | Fair |
| 310TH St over Porter Creek | 1940 | 5 | Fair |
| FM over Paradise Creek | 1988 | 5 | Good |
| FM over Willow Creek | 1950 | 5 | Fair |
| L Ave over Minor Drainage | 2013 | 5 | Good |
| Local over Beaver Creek | 2006 | 5 | Fair |
| Local over Buffalo Creek | 1960 | 5 | Fair |
| W Ave over Local Stream | 1960 | 5 | Fair |
| West Side Ave over East Boyer River | 2024 | 5 | Good |