| I-80 over Middle Wapsinonoc Creek | 1960 | 39,700 | Fair |
| I-80 over Stream | 1960 | 39,700 | Fair |
| I-80 over Stream | 1960 | 39,700 | Fair |
| I-80 over Drainage Ditch | 1959 | 36,000 | Fair |
| I-80 over Drainage Ditch | 1960 | 36,000 | Fair |
| I-80 over Little Elkhorn Creek | 1959 | 36,000 | Fair |
| WB I-80 over Abandon RR | 1962 | 19,500 | Fair |
| I 80 EB Ia 38 SB over Sugar Creek | 2024 | 19,000 | Good |
| I 80 WB Ia 38 NB over Sugar Creek | 2024 | 18,650 | Good |
| EB I-80 over Cedar River | 2009 | 18,600 | Good |
| I 80 WB over Cedar River | 2010 | 18,250 | Good |
| X 30 Baker Ave over I-80 | 2011 | 6,900 | Good |
| US 30 over Clear Creek | 1987 | 5,500 | Good |
| US 30 over Unnamed Stream | 2019 | 5,500 | Good |
| US 30 over Rock Creek | 1973 | 4,410 | Fair |
| US 30 over Mill Creek | 1974 | 3,540 | Fair |
| US 6 & Ia 38 over Otter Creek | 1959 | 3,520 | Fair |
| Main St over W Branch Wapsinonoc Crk | 1989 | 3,410 | Good |
| Ia 38 over Stream | 1956 | 3,360 | Fair |
| X-40 over I-80 | 1960 | 3,210 | Fair |
| Ia 38 over Crooked Creek | 1959 | 3,110 | Fair |
| Main St over Drainage Ditch | 1978 | 3,067 | Good |
| 5TH St over Big Elkhorn Creek | 1987 | 3,050 | Good |
| F58 Ia 927 over Small Stream | 2017 | 3,050 | Good |
| US 30 over Drainage Ditch | 1955 | 2,790 | Good |
| US 30 over Yankee Run | 1955 | 2,790 | Fair |
| US 30 over Yankee Run | 1955 | 2,790 | Fair |
| Ia 38 over Branch Rock Creek | 1996 | 2,600 | Good |
| FM over Wapsinonoc Creek | 1956 | 2,480 | Fair |
| X30 Baker Ave over Wapsinonoc Creek | 2019 | 2,480 | Good |
| Ia 38 over I-80 | 1960 | 2,410 | Fair |
| 1ST Avenue over Big Elkhorn Creek | 1997 | 2,310 | Fair |
| US 6 & Ia 38 over I-80 | 1959 | 2,280 | Fair |
| Ia 130 over Stream | 2008 | 2,040 | Good |
| Ia 130 over Sugar Creek | 2013 | 2,040 | Good |
| FM over Cedar River | 1966 | 1,860 | Poor |
| Ia 130 over Stream | 1987 | 1,800 | Good |
| FM over Rock Creek | 1996 | 1,660 | Good |
| FM over Rock Creek | 1967 | 1,660 | Poor |
| SR Y26 over I-80 | 1959 | 1,580 | Fair |
| FM over Wapsinonoc Creek | 1960 | 1,488 | Fair |
| Ia 38 over Drainage Ditch | 2020 | 1,360 | Good |
| 210TH St over Rock Run Creek | 2000 | 1,350 | Fair |
| FM over Rock Creek | 1959 | 1,350 | Poor |
| FM over Rock Run Creek | 2008 | 1,350 | Good |
| FM over Rock Run Creek | 1996 | 1,300 | Good |
| F 44 over Drainage Ditch | 1951 | 1,220 | Fair |
| Union Ave over East Sugar Creek | 2000 | 970 | Fair |
| Union Ave over Sugar Creek | 2000 | 970 | Good |
| F28 (baker Ave) over Gower Creek | 2012 | 968 | Good |
| FM over Gower Creek | 1997 | 968 | Good |
| FM over Cedar River | 1971 | 950 | Poor |
| Ia 130 over Drainage Ditch | 1996 | 900 | Good |
| Ia 130 over Stream | 1996 | 900 | Good |
| FM over Nicholson Creek | 1960 | 836 | Poor |
| F44 290TH St over Small Stream | 1952 | 810 | Fair |
| F44 290TH St over Wapsinonoc Creek | 2021 | 810 | Good |
| College St over W Branch Wapsinonoc Crk | 2019 | 778 | Good |
| FM over Pioneer Creek | 1994 | 770 | Fair |
| FM over Plum Creek | 1957 | 740 | Fair |
| FM over Small | 2004 | 740 | Good |
| FM over Yankee Run Creek | 1957 | 740 | Poor |
| FM over Small Stream | 1993 | 710 | Fair |
| F44 290TH St over Cedar River | 1948 | 620 | Poor |
| FM X-46 over I-80 | 1960 | 620 | Fair |
| Y14 Hoover Hwy over Yankee Run Creek | 2015 | 560 | Good |
| F44 290TH St over Small Stream | 1951 | 550 | Fair |
| F44 290TH St over Small Stream | 1951 | 550 | Fair |
| FM Y-14 over I-80 | 1959 | 550 | Fair |
| FM over Mill Creek | 1956 | 550 | Poor |
| FM over Mill Creek | 1958 | 550 | Poor |
| FM over Wapsipinicon River | 1969 | 520 | Poor |
| Hoover Hwy over Lizard Creek | 2011 | 480 | Good |
| Y14 Hoover Hwy over Rock Creek | 2016 | 480 | Good |
| Parkside Drive over Wapsinonoc Creek | 1970 | 400 | Fair |
| 8TH St over Drainage | 2023 | 386 | Good |
| FM over Crooked Creek | 1989 | 330 | Fair |
| FM over Yankee Run | 1940 | 330 | Poor |
| Adams Ave over US 30 | 2020 | 280 | Good |
| 5TH St over Drainage | 1940 | 232 | Poor |
| FM over Crooked Creek | 1923 | 230 | Poor |
| FM over Sugar Creek | 1958 | 230 | Fair |
| Second Street over Wapsinonoc Creek | 1976 | 230 | Fair |
| FM over Nicholson Creek | 1975 | 210 | Fair |
| FM over I-80 | 1960 | 190 | Fair |
| FM over Mud Creek | 1986 | 190 | Fair |
| Stone Mill Rd over Rock Creek | 2011 | 190 | Good |
| FM over Rock Creek | 1945 | 170 | Poor |
| FM over W Br Wapsipinicon Creek | 2009 | 160 | Good |
| 220TH St over Rock Run Creek | 1975 | 140 | Good |
| 310TH St over Wapsinonoc Creek | 1992 | 130 | Good |
| FM over Br Cedar River | 2008 | 130 | Good |
| Local over Mill Creek | 1992 | 130 | Good |
| 160TH St over Stream | 1955 | 120 | Fair |
| Buckeye Rd over W Br Wapsinonoc Creek | 1981 | 120 | Fair |
| Buckeye Rd over Wapsinonoc Creek | 1975 | 120 | Fair |
| FM over Baldwin Creek | 1975 | 120 | Fair |
| FM over Pedee Creek | 1965 | 110 | Poor |
| FM over Small | 1980 | 110 | Poor |
| 300TH St over Small | 2007 | 105 | Good |
| 140TH St over Br Yankee Run | 2006 | 100 | Fair |
| 330TH St over Small Stream | 2013 | 100 | Good |
| Muscatine Rd over Sugar Creek | 1935 | 100 | Poor |
| 300TH St over Middle Br Wapsinonoc CR | 2005 | 92 | Good |
| 155TH St over Yankee Run | 1995 | 90 | Poor |
| 320TH St over E Br Wapsinonoc CR | 1975 | 90 | Poor |
| 320TH St over E Br Wapsinonoc CR | 2013 | 90 | Good |
| FM over Rock Creek | 1991 | 90 | Good |
| FM over Rock Run Creek | 2004 | 90 | Good |
| FM over Sugar CR | 1945 | 90 | Fair |
| Local over Creek | 2004 | 90 | Good |
| Taylor Ave over Yankee Run Creek | 2018 | 90 | Good |
| 155TH St over Br of Yankee Run Creek | 2008 | 86 | Good |
| Orange St over Drainage Ditch | 2005 | 82 | Fair |
| Local over Stream | 1975 | 81 | Fair |
| 310TH St over Br Big Elkhorn CR | 2019 | 80 | Good |
| Charles Ave over Br Clear CR | 2011 | 80 | Good |
| F46 310TH St over Br Wapsinonoc Creek | 2020 | 80 | Good |
| FM over Br Big Elkhorn Ck | 1978 | 80 | Fair |
| FM over I-80 | 1960 | 80 | Good |
| FM over Sugar Creek | 1946 | 80 | Fair |
| Local over Clear Creek | 1939 | 80 | Fair |
| City Street over W Br Wapsinonoc Creek | 1997 | 77 | Good |
| Cemetary Rd over Cedar River | 1930 | 72 | Poor |
| Local over Nicholson Creek | 2003 | 72 | Good |
| 210TH St over Br Sugar CR | 2007 | 71 | Good |
| 210TH St over Sugar CR | 2016 | 71 | Good |
| 220TH St over Rock Run Creek | 1975 | 71 | Fair |
| 230 Th St over Stream | 2007 | 71 | Good |
| 230TH St over Rock Creek | 2006 | 71 | Good |
| 230TH St over Stream | 1999 | 71 | Fair |
| 230TH St over Stream | 1950 | 71 | Poor |
| Adams Ave over Clear Creek | 1981 | 71 | Fair |
| Local Rd over Clear Creek | 1946 | 71 | Poor |
| Red Star Rd over Sugar Creek | 2021 | 71 | Good |
| Taylor Ave over Yankee Run Creek | 2008 | 71 | Good |
| Vermont Ave over Rock Creek | 2011 | 71 | Good |
| Charles Ave over Br Clear CR | 2016 | 70 | Good |
| Charles Ave over Clear Creek | 2005 | 70 | Fair |
| Delta Ave over Baldwin Creek | 2014 | 70 | Good |
| FM over Gower Creek | 1994 | 70 | Good |
| FM over Masons Creek | 1953 | 70 | Fair |
| FM over Rock Creek | 2008 | 70 | Good |
| FM over Sugar Creek | 2002 | 70 | Good |
| FM over Wapsinicon River | 2010 | 70 | Good |
| FM over West Rock Creek | 1979 | 70 | Fair |
| Old Muscatine Rd over Otter Creek | 2023 | 70 | Good |
| Pine Ave over I-80 | 1960 | 70 | Fair |
| X 60(OCEAN Ave) over Sugar Creek | 2010 | 70 | Good |
| 310TH St over Little Elkhorn CR | 2000 | 61 | Good |
| 200TH over Sugar Creek | 1985 | 60 | Fair |
| 230TH St over Small | 2005 | 60 | Fair |
| 230TH St over Stream | 2007 | 60 | Good |
| 240TH St over Sugar Creek | 1995 | 60 | Good |
| 270TH St over Rock Creek | 2010 | 60 | Good |
| 273RD St over Rock Creek | 1978 | 60 | Good |
| Adams Ave over Stream | 1923 | 60 | Poor |
| FM over Mill Creek | 2004 | 60 | Good |
| FM over Mill Creek | 2003 | 60 | Good |
| FM over Nicholson Creek | 1998 | 60 | Good |
| FM over Rock Creek | 1975 | 60 | Fair |
| FM over Rock Creek | 1958 | 60 | Poor |
| FM over Sugar Creek | 1997 | 60 | Fair |
| FM over Sugar Creek | 2007 | 60 | Good |
| FM over West Rock Creek | 1974 | 60 | Fair |
| Franklin Ave over M Br Wapsipinonoc Creek | 2010 | 60 | Good |
| Garfield Rd over Stream | 1990 | 60 | Fair |
| Kelley Ave over Small | 2009 | 60 | Good |
| Monroe Ave. over Sibles Creek | 2003 | 60 | Fair |
| Vermont Ave over Small | 2005 | 60 | Fair |
| Washington Ave over Lizard Creek | 2023 | 60 | Good |
| X 42 Indian Ave over Wapsinonoc Creek | 2019 | 60 | Good |
| FM over Big Elkhorn CR | 2006 | 51 | Fair |
| Local over Small | 1979 | 51 | Poor |
| 110TH St over Sibles Creek | 1945 | 50 | Fair |
| 165TH St over Br of Sugar Creek | 2009 | 50 | Good |
| 240TH St over Br Gower CR | 1924 | 50 | Poor |
| 320TH St over Stream | 2017 | 50 | Good |
| Charles Ave over Gower Creek | 1977 | 50 | Fair |
| F16 18TH St over Baldwin Creek | 2022 | 50 | Good |
| FM over Sugar Creek | 1960 | 50 | Fair |
| FM over W Rock Creek | 2001 | 50 | Good |
| FM over Wapsinonoc Creek | 2010 | 50 | Good |
| FM over Wasipinicon Creek | 2009 | 50 | Good |
| Green Rd over Rock Run CR | 1920 | 50 | Poor |
| King Ave over Rock CR | 1946 | 50 | Poor |
| Local over Sugar Creek | 1986 | 50 | Fair |
| Quincy Ave over Br Mill CR | 1925 | 50 | Poor |
| Stone Mill Rd over Rock Run Creek | 1974 | 50 | Poor |
| Vermont Ave over I-80 | 1959 | 50 | Fair |
| Local over Otter CR | 1960 | 46 | Fair |
| 143RD St over Clear Creek | 2023 | 45 | Good |
| 180TH St over Small Stream | 2002 | 45 | Good |
| 180TH St over Sugar Creek | 1976 | 45 | Poor |
| 250TH St over Sugar Creek | 1989 | 45 | Fair |
| Dixon Ave over Baldwin Creek | 2002 | 45 | Good |
| FM over Sugar Creek | 1975 | 45 | Fair |
| Local over Br Pioneer CR | 1998 | 45 | Good |
| Park Rd over Rock Creek | 1985 | 45 | Fair |
| Rose Ave over Small | 2009 | 45 | Good |
| 205TH St over Rock Creek | 1996 | 40 | Fair |
| 205TH St over Rock Creek | 2014 | 40 | Good |
| 205TH Street over Rock CR | 2005 | 40 | Good |
| 255TH St over Crooked Creek | 1965 | 40 | Poor |
| FM over Sugar Creek | 2001 | 40 | Fair |
| FM over Wapsinonoc Creek | 1994 | 40 | Fair |
| Franklin Ave over Pioneer Creek | 2006 | 40 | Good |
| Grant Ave over Small | 1998 | 40 | Good |
| Monroe Ave over Stream | 2006 | 40 | Fair |
| Roosevelt Ave over Mill CR | 2005 | 40 | Good |
| 300TH St over Small | 2005 | 35 | Good |
| 325TH St over Little Elkhorn Creek | 2011 | 35 | Good |
| 330TH St over E Br Wapsinonoc Creek | 1996 | 35 | Fair |
| Charles Ave over W Br Wapsinonoc CR | 1925 | 35 | Poor |
| FM over Elkhorn Creek (little) | 1915 | 35 | Poor |
| Local over Br Big Elkhorn Creek | 2004 | 35 | Good |
| Local over Rock Creek | 1986 | 35 | Fair |
| Local over Small | 1979 | 35 | Fair |
| Local over W Br Wapsinonoc Creek | 1979 | 35 | Poor |
| Spicer Ave over Rock Creek | 2016 | 35 | Good |
| 110TH Street over Branch of Pioneer Creek | 2003 | 34 | Fair |
| 250TH St over Sugar Creek | 2018 | 34 | Good |
| 300TH St over E Br Wapsinonoc CR | 2006 | 34 | Fair |
| Fox Ave over Rock Run Creek | 1991 | 34 | Good |
| Grant Ave over Pioneer Creek | 1976 | 34 | Poor |
| King Ave over Rock Creek | 2012 | 34 | Good |
| Local over Baldwin Creek | 1958 | 34 | Fair |
| Local over Mill Creek | 2004 | 34 | Good |
| Local over Rock Creek | 2009 | 34 | Good |
| Local over West Rock Creek | 1996 | 34 | Good |
| Monroe Ave over Crooked Creek | 1975 | 34 | Fair |
| Taylor Ave over Rock Creek | 1991 | 34 | Good |
| Washington Ave over Small Stream | 2017 | 34 | Good |
| Local over Sugar Creek | 1978 | 31 | Fair |
| 300TH St over Crooked CR | 2007 | 30 | Fair |
| E 63 (110TH) over Mill Creek | 2012 | 30 | Good |
| FM over Rock Run Creek | 2008 | 30 | Good |
| Local over Rock Creek | 1915 | 30 | Poor |
| Local over Small Stream | 1995 | 30 | Good |
| Local over Small Stream | 1991 | 30 | Good |
| Plum Ave over Sugar CR | 1960 | 30 | Fair |
| 250TH St over Small | 2010 | 26 | Good |
| 280TH St over Middle Br Wapsinonoc CR | 1950 | 26 | Poor |
| Baker Ave over Coon Creek | 2001 | 26 | Good |
| Hayes Ave over Br Rock Run CR | 1900 | 26 | Poor |
| Hayes Ave over Rock Run CR | 2008 | 26 | Good |
| Hayes Ave over Rock Run Creek | 1930 | 26 | Poor |
| Kelly Ave over Rock Creek | 1989 | 26 | Fair |
| Local over Br Lizard Creek | 1997 | 26 | Fair |
| Local over Br Mill Creek | 1990 | 26 | Good |
| Local over Little Elkhorn CR | 2002 | 26 | Fair |
| Local over Otter CR | 1975 | 26 | Fair |
| Taylor Ave over Stream | 2006 | 26 | Good |
| Taylor Ave over Sugar Creek | 2023 | 26 | Good |
| Taylor Rd over Stream | 1999 | 26 | Fair |
| 130TH St over Mill CR | 1930 | 20 | Poor |
| 180TH Street over Stream | 2006 | 20 | Good |
| 270TH St over Crooked CR | 1930 | 20 | Poor |
| 320TH St over Middle Br Wapsinonoc CR | 1930 | 20 | Poor |
| Cedar/johnson over Wapsinonoc Creek | 1996 | 20 | Good |
| Echo Ave over Masons Creek | 2006 | 20 | Good |
| Eureka Ave over Middle Br Wapsinonoc CR | 1895 | 20 | Poor |
| Eureka Ave over Small | 1979 | 20 | Fair |
| FM over East Sugar Creek | 1914 | 20 | Poor |
| Harding Ave over Br Rock Creek | 1997 | 20 | Fair |
| Indian Ave over Pioneer Creek | 1976 | 20 | Poor |
| Local over Little Elkhorn Creek | 2001 | 20 | Fair |
| Local over Otter Creek | 1993 | 20 | Fair |
| Spicer Ave over Small | 1999 | 20 | Fair |
| Spicer Ave over Stream | 1915 | 20 | Poor |
| Spicer Ave over Stream | 1991 | 20 | Good |
| Vermont Ave over Rock CR | 2000 | 20 | Good |
| 150TH St over Br Rock CR | 1920 | 15 | Poor |
| 205TH St over Rock CR | 1917 | 15 | Poor |
| 247TH St over Rock Run Creek | 1974 | 15 | Fair |
| 320TH St over Stream | 1940 | 15 | Fair |
| Co Line Rd over Br Mill CR | 2012 | 15 | Good |
| Grant Ave over Small | 1976 | 15 | Poor |
| Harding Ave over Small | 1997 | 15 | Fair |
| Local over Creek | 1974 | 15 | Fair |
| Local over Crooked Creek | 1996 | 15 | Fair |
| Local over Crooked Creek | 1935 | 15 | Poor |
| Local over Small Stream | 1991 | 15 | Poor |
| Newton Ave over Crooked CR | 1974 | 15 | Poor |
| Newton Ave over Crooked Creek | 2017 | 15 | Good |
| Rose Ave over Small | 1979 | 15 | Poor |
| Yankee Ave over Plum Creek | 1976 | 15 | Poor |
| 170TH St over Rock CR | 1975 | 11 | Fair |
| 270TH St over Br W Br Wapsinonoc CR | 2010 | 11 | Fair |
| 300TH St (lwc) over Crooked CR | 1998 | 11 | Fair |
| 330TH St over Stream | 1930 | 11 | Poor |
| Cedar\jones Rd over Br Pioneer CR | 1992 | 11 | Poor |
| Cedar\jones Rd over Small | 1980 | 11 | Poor |
| Cider Ave over Coon CR | 1998 | 11 | Good |
| Echo Ave over Nicholson Creek | 1960 | 11 | Good |
| Indian Ave over W Rock CR | 1918 | 11 | Poor |
| Local over Br Little Elkhorn CR | 1946 | 11 | Fair |
| 135TH St over Small | 2015 | 5 | Good |
| 160TH St over Small | 1904 | 5 | Fair |
| Eureka Ave over Middle Br Wapsininoc CR | 1904 | 5 | Poor |