| US 61 & Ia 22 over Mad Creek | 1984 | 18,300 | Good |
| US 61 over Hershey Ave | 2008 | 12,100 | Good |
| Isett Ave over Geneva Creek | 1980 | 11,716 | Fair |
| E 2ND St over Mad Creek | 1963 | 8,700 | Fair |
| Ia 38 over Mad Creek | 1972 | 8,200 | Fair |
| Washngton St. over Mad Creek | 1986 | 7,906 | Fair |
| 5TH St over Mad Creek | 2006 | 7,900 | Fair |
| Ia 38 over Mosquito Creek | 1972 | 5,300 | Fair |
| US 6 & Ia 38 over Iais RR | 1930 | 5,200 | Fair |
| US 6 & Ia 38 over Mud Creek | 1924 | 5,200 | Fair |
| US 61 NB over Pine Creek | 1990 | 5,200 | Good |
| US 61 SB over Pine Creek | 1997 | 5,200 | Good |
| Clay St over Mad Creek | 1957 | 4,858 | Fair |
| US 6 over West Wapsinonoc Creek | 2013 | 4,410 | Good |
| Ia 92 over Mississippi River & RR | 1972 | 3,820 | Fair |
| Ia 22 over Cedar River | 1987 | 3,650 | Good |
| Ia 22 over Pike Run Creek | 1987 | 3,650 | Fair |
| US 61 NB over Muscatine Slough | 2002 | 3,500 | Good |
| US 61 SB over Muscatine Slough | 2002 | 3,500 | Good |
| 200TH St over Mud Creek | 2008 | 3,100 | Good |
| F58 (hwy 927) over Mud Creek | 2013 | 3,100 | Good |
| FM over Wapsi Creek | 1971 | 3,080 | Poor |
| Ia 22 over Rock Creek | 1984 | 3,050 | Good |
| Ia 22 & 70 over Wapsinonoc Creek | 1988 | 2,830 | Good |
| Lake Park Blvd over Mad Creek | 1973 | 2,710 | Fair |
| Ia 70 over Goshen Ditch | 2007 | 2,660 | Good |
| Ia 70 over Wapsinonoc Creek | 1988 | 2,660 | Fair |
| Hwy 927 over Elkhorn Creek | 1929 | 2,340 | Poor |
| US 6 over Cedar River | 1972 | 1,770 | Fair |
| US 6 over E Br Wapsinonoc Creek | 1920 | 1,770 | Poor |
| US 6 over Goshen Ditch | 1981 | 1,770 | Fair |
| US 6 over Sugar Creek | 1973 | 1,770 | Fair |
| Ia 22 over Drainage Ditch | 1978 | 1,730 | Fair |
| Ia 22 over Drainage Ditch | 1984 | 1,730 | Good |
| Ia 22 over Drainage Ditch | 1984 | 1,730 | Good |
| Ia 22 over Stream | 1967 | 1,730 | Fair |
| Ia 22 over Sweetland Creek | 1978 | 1,730 | Fair |
| FM over Overflow From Sugar Crk | 1971 | 1,640 | Poor |
| Bidwell Rd over Geneva Creek | 1980 | 1,620 | Fair |
| FM over Mud Creek | 1972 | 1,600 | Poor |
| FM over Pine Creek | 1955 | 1,600 | Poor |
| FM over Mud Creek | 1971 | 1,580 | Poor |
| Ia 22 over Stream | 1967 | 1,560 | Fair |
| Ia 22 over Stream | 1984 | 1,560 | Fair |
| FM over Wapsinonoc Creek | 1981 | 1,510 | Poor |
| Ia 22 over Pine Creek | 1973 | 1,490 | Fair |
| Ia 22 over over RR Spur (dme RR) | 1996 | 1,490 | Good |
| FM over Mosquito Ck | 1978 | 1,260 | Poor |
| FM over Mosquito Creek | 1978 | 1,260 | Poor |
| FM over Cedar River | 1966 | 990 | Poor |
| FM over Little Mosquito Creek | 1964 | 990 | Poor |
| FM over Creek | 2001 | 890 | Good |
| FM over Small Stream | 2001 | 850 | Good |
| FM over Drainage Ditch 2 | 1969 | 840 | Poor |
| Ia 70 over Drainage Ditch | 1988 | 830 | Fair |
| 112TH St over Sugar Creek | 2000 | 733 | Good |
| FM over Mud Creek | 2002 | 620 | Good |
| FM over Smith Run | 1949 | 560 | Fair |
| FM over Cedar River | 1997 | 550 | Fair |
| FM over Dry Run | 1986 | 550 | Fair |
| FM over Gedney Lake | 1975 | 550 | Fair |
| FM over Pike Creek | 1986 | 550 | Fair |
| FM over Creek | 1970 | 490 | Fair |
| FM over Crane Creek | 1993 | 400 | Fair |
| Local over Mud Creek | 1983 | 383 | Fair |
| FM over Sweetland Creek | 1948 | 380 | Fair |
| Local over Lowe Run | 1928 | 380 | Poor |
| FM over Small Stream | 1950 | 320 | Fair |
| FM over Mud Creek | 1948 | 290 | Poor |
| Local over Otter Creek | 1996 | 280 | Good |
| Burlington Rd over Kincaid Creek | 2015 | 260 | Good |
| Local over Muscatine Slough | 1975 | 239 | Fair |
| 110TH St over Creek | 2010 | 227 | Good |
| 110TH St over Creek | 2011 | 227 | Good |
| FM over Creek | 1970 | 200 | Poor |
| FM over Pine Creek | 2008 | 200 | Good |
| Park Ave W over Mad Creek | 1924 | 184 | Poor |
| FM over Creek | 1954 | 180 | Fair |
| FM over Pine Creek | 1963 | 180 | Fair |
| 110TH St over Creek | 2018 | 176 | Good |
| Local over Wapsinonoc Creek | 1936 | 176 | Poor |
| FM over Creek | 2005 | 170 | Good |
| Local over Mud Creek | 1996 | 166 | Good |
| Local over Mud Creek | 1967 | 155 | Fair |
| FM over Big Slough Drainage Dit. | 1968 | 150 | Fair |
| Saulsbury Rd over Chicken Creek | 2013 | 145 | Good |
| FM over Hockeys Slough | 1977 | 130 | Fair |
| F70 155TH St over Small Creek | 2019 | 110 | Good |
| FM over Dd 2 | 2004 | 110 | Good |
| FM over Goshien Drainage Ditch | 2010 | 110 | Good |
| FM over Wapsinonoc Creek | 1982 | 110 | Fair |
| Local over Creek | 1956 | 104 | Fair |
| Local over Mud Creek | 1988 | 104 | Fair |
| N Isett Ave over Small Creek | 2019 | 100 | Good |
| 120TH St over Creek | 2020 | 91 | Good |
| 135TH St over Branch of Mud Creek | 2023 | 91 | Good |
| Douglas Ave over Pike Drainage Ditch | 2021 | 91 | Good |
| Local over Pike Run | 2004 | 91 | Good |
| Lindle Ave over Creek | 2017 | 82 | Good |
| Local over Creek | 1996 | 82 | Good |
| York Ave over Mud Creek | 2022 | 82 | Good |
| FM over Sweetland Creek | 1937 | 80 | Fair |
| FM over West Branch Mud Creek | 1960 | 80 | Poor |
| Local over Creek | 1958 | 80 | Fair |
| Local over Creek | 2004 | 80 | Good |
| Local over Creek | 1948 | 73 | Fair |
| FM over Creek | 2005 | 70 | Good |
| Local over Drainage Ditch 13 | 1968 | 62 | Fair |
| Local over Wapsipinicon Creek | 1975 | 62 | Fair |
| FM over Pine Creek | 1949 | 60 | Fair |
| FM over Pine Creek | 1955 | 60 | Poor |
| FM over Wapsie Creek | 1967 | 60 | Fair |
| Local over Creek | 1967 | 60 | Fair |
| Local over Yellow Creek | 2004 | 60 | Good |
| N Isett Ave over Little Mosquito Creek | 2024 | 53 | Good |
| Local over Dd 2 | 2010 | 51 | Good |
| Local over Pine Creek | 1941 | 51 | Poor |
| FM over Mud Creek | 1939 | 50 | Poor |
| Local over Big Slough Creek | 1985 | 50 | Fair |
| Local over Creek | 1960 | 50 | Poor |
| Local over Big Slough Creek | 1989 | 47 | Fair |
| Local over Mud Creek | 1954 | 47 | Poor |
| 180TH St over Pine Creek | 2016 | 45 | Good |
| Bancroft Ave over Big Slough Creek | 1937 | 45 | Poor |
| Local over Branch Big Slough Creek | 1985 | 45 | Fair |
| Local over Harvey Ditch | 1937 | 45 | Fair |
| Local over Drainage | 1971 | 41 | Fair |
| Local over Pike Creek | 1900 | 41 | Poor |
| FM over Big Slough Creek | 1980 | 40 | Fair |
| Local over Creek | 1970 | 40 | Fair |
| Local over Pike Run Creek | 2003 | 40 | Good |
| Local over Creek | 1956 | 35 | Poor |
| 150TH St over Little Mosquito Creek | 2023 | 30 | Good |
| Local over Creek | 1955 | 30 | Fair |
| Local over Wapsinonoc Creek | 2006 | 30 | Good |
| Local over Drainage | 1947 | 26 | Fair |
| Holly Ave over Goshen Drainage Ditch | 2023 | 25 | Good |
| Local over Creek | 1942 | 21 | Poor |
| FM over Honey Creek | 2003 | 20 | Good |
| Local over Creek | 1951 | 15 | Fair |
| Local over Drainage Ditch 2 | 2004 | 15 | Good |
| Local over Small | 1978 | 15 | Poor |
| Farm Entrance over Drainage Ditch(sdb) | 1920 | 10 | Poor |
| X 54 over Sugar Creek | 1971 | 10 | Fair |