| US 61 over Drainage Ditch | 1967 | 8,100 | Good |
| Y53 200TH Ave over Prairie Creek | 2022 | 7,205 | Good |
| US 61 NB over S Fork Maquoketa River | 1967 | 5,100 | Fair |
| US 61 SB over S Fork Maquoket River | 1998 | 5,100 | Fair |
| NB US 61 over Prairie Creek | 1967 | 4,600 | Fair |
| SB US 61 over Prairie Creek | 1996 | 4,600 | Good |
| US 61 NB over Farmers Creek | 1966 | 4,050 | Fair |
| US 61 NB over Farmers Creek | 1966 | 4,050 | Good |
| US 61 NB over N Fork Maquoketa River | 1967 | 4,050 | Fair |
| US 61 NB over Tarecod Creek | 1967 | 4,050 | Fair |
| US 61 SB over Farmers Creek | 1998 | 4,050 | Good |
| US 61 SB over Farmers Creek | 1996 | 4,050 | Good |
| US 61 SB over N Fork Maquoketa River | 1996 | 4,050 | Good |
| US 61 SB over Tare Cod Creek | 1996 | 4,050 | Good |
| NB US 61 over Ia 64 | 1997 | 3,550 | Good |
| SB US 61 over Ia 64 | 1997 | 3,550 | Good |
| Summit St over US 61 | 1997 | 3,277 | Fair |
| South Main St over U.S. 61 | 1996 | 3,211 | Fair |
| US 52 over Dme RR | 1996 | 3,100 | Good |
| US 52 over Spruce Creek | 1986 | 3,100 | Fair |
| US 52 over Stream | 1986 | 3,100 | Good |
| US 52 over Tete Des Morts Creek | 1986 | 3,100 | Fair |
| US 52 over Cp Rr/mill Creek | 2009 | 2,640 | Good |
| Ia 64 over South Copper Creek | 1984 | 2,350 | Fair |
| US 52 over Dme RR | 1993 | 2,330 | Good |
| Ia 64 over Deep Creek | 1984 | 2,290 | Good |
| Ia 64 over Drainage Ditch | 1981 | 2,200 | Fair |
| US 52 & Ia 64 over Mississippi R Overflow | 2018 | 2,150 | Good |
| US 52 & Ia 64 over Mississippi River | 2017 | 2,150 | Good |
| Ia 64 over Bear Creek | 1982 | 2,090 | Fair |
| Ia 64 over Big Bear Creek | 1982 | 2,090 | Good |
| Ia 62 over Maquoketa River | 1957 | 2,030 | Fair |
| Ia 62 over Mill Creek | 1976 | 1,930 | Good |
| Ia 64 over Grants Creek | 1984 | 1,890 | Good |
| Ia 64 over Prairie Creek | 1976 | 1,800 | Fair |
| Summit St over over Aband RR | 1973 | 1,785 | Fair |
| FM over So Fk Maquoketa River | 1999 | 1,730 | Good |
| US 52 over Duck Creek | 1978 | 1,590 | Fair |
| US 52 over Pleasant Creek | 1978 | 1,500 | Fair |
| Ia 64 over Stream | 1976 | 1,200 | Fair |
| FM over Maquoketa River | 1966 | 1,170 | Fair |
| Ia 62 over Brush Creek | 1960 | 1,100 | Fair |
| Ia 62 over Little Mill Creek | 1976 | 1,100 | Good |
| FM over Copper Creek | 1974 | 1,070 | Fair |
| FM over S Copper Creek | 1974 | 1,070 | Poor |
| Ia 64 over No Branch Elk Creek | 1984 | 930 | Good |
| US 52 over Beaver Creek | 1984 | 930 | Good |
| US 52 over Stream | 1978 | 930 | Fair |
| US 52 over Twin Springs Creek | 1978 | 930 | Good |
| US 52 over Br of Coons Creek | 1978 | 920 | Good |
| US 52 over Maquoketa River | 1956 | 920 | Fair |
| US 52 over Pincham Hollow Creek | 1978 | 920 | Fair |
| FM over Spruce Creek | 1982 | 670 | Fair |
| D61 over Lytles Creek | 2016 | 660 | Good |
| FM over Creek | 1985 | 630 | Fair |
| FM over Small Stream | 1998 | 630 | Fair |
| Division St over Beers Creek | 2018 | 629 | Good |
| FM over Maquoketa River | 1956 | 610 | Fair |
| Bellevuecascade Rd over Lost Creek | 1983 | 590 | Fair |
| FM over Creek | 1991 | 570 | Fair |
| FM over Farmers Creek | 1979 | 570 | Fair |
| 150TH St over Brush Creek | 2011 | 550 | Good |
| 182 Ave over Drainage Ditch | 1997 | 550 | Fair |
| 182 Ave over Drainage Ditch | 1999 | 540 | Fair |
| E17 150TH St over Jessie Branch | 2018 | 540 | Good |
| FM over S Fork Maquoketa River | 1954 | 510 | Fair |
| Water Street over Creek | 1980 | 510 | Fair |
| FM over Creek | 1971 | 500 | Fair |
| FM over Creek | 1971 | 500 | Fair |
| FM over Duck Creek | 1950 | 500 | Poor |
| FM over Small Creek | 1950 | 500 | Fair |
| Local Rd over Br Spruce Creek | 1998 | 499 | Fair |
| South Main St over Farmers Creek | 2017 | 440 | Good |
| FM over Lux Creek | 1961 | 430 | Fair |
| FM over Maquoketa River | 1964 | 430 | Fair |
| FM over N Fork Maquoketa River | 1952 | 400 | Poor |
| FM over Farmers Creek | 1990 | 380 | Fair |
| FM over Farmers Creek | 1979 | 380 | Fair |
| FM over Creek | 1993 | 370 | Fair |
| FM over Otter Creek | 1993 | 370 | Fair |
| FM over Creek | 1998 | 330 | Fair |
| FM over Maquoketa River | 1950 | 330 | Poor |
| FM over N Fork Maquoketa River | 2005 | 290 | Fair |
| Local over Small Creek | 1977 | 279 | Fair |
| FM 13TH St over Prairie Creek | 2000 | 246 | Fair |
| FM 13TH St over Silver Creek | 2000 | 246 | Fair |
| FM over Bear Creek | 1995 | 240 | Fair |
| Local Rd over Small Creek | 1981 | 239 | Fair |
| 35TH St over Mill Creek | 2019 | 236 | Good |
| 341ST St over Small Creek | 2020 | 235 | Good |
| FM over Creek | 1988 | 230 | Fair |
| FM over Creek | 1987 | 230 | Fair |
| FM over S Fork Maquoketa River | 1987 | 230 | Fair |
| Union St over Farmers Creek | 1988 | 230 | Fair |
| FM over Small Creek | 1979 | 226 | Fair |
| 49TH Street over Creek | 2023 | 207 | Good |
| Centerville Rd over Tete Des Morts Creek | 2012 | 190 | Good |
| FM over Small Creek | 1953 | 177 | Fair |
| FM over Creek | 2005 | 170 | Fair |
| Local over Stream | 1998 | 157 | Fair |
| FM over Creek | 2004 | 150 | Good |
| School St over Creek | 1984 | 150 | Fair |
| High Bridge Rd over Small Stream | 2020 | 137 | Good |
| Local over Big Bear Creek | 1983 | 137 | Fair |
| FM over Stream | 1959 | 130 | Fair |
| Local over Prairie Creek | 1971 | 130 | Poor |
| Main St over Deep Creek | 1990 | 130 | Fair |
| D57 Mill Creek Rd over Small Stream | 2020 | 128 | Good |
| Local over Small Creek | 2007 | 128 | Fair |
| 140TH Ave over Otter Creek | 2014 | 120 | Good |
| FM over Creek | 1977 | 120 | Poor |
| FM over Small | 1983 | 120 | Fair |
| Local over Creek | 1938 | 110 | Poor |
| Local over Small Creek | 2003 | 110 | Fair |
| Local over Small Creek | 1982 | 108 | Fair |
| FM over Copper Creek | 1993 | 100 | Good |
| Local over Creek | 1991 | 99 | Fair |
| FM over Small Creek | 1988 | 90 | Fair |
| Local over Creek | 1978 | 90 | Fair |
| Local over Small Creek | 1957 | 90 | Fair |
| 216TH St over Little Mill Creek | 2022 | 88 | Good |
| FM over S Fork Maquoketa River | 1982 | 80 | Poor |
| FM over Small | 1980 | 80 | Poor |
| Local over Brush Creek | 1985 | 79 | Fair |
| Local over Small Creek | 1969 | 79 | Fair |
| Local over Small Creek | 1998 | 79 | Fair |
| 21ST Street over South Copper Creek | 2023 | 78 | Good |
| 400TH St over Lux Creek | 2021 | 78 | Good |
| Local over Creek | 2002 | 78 | Fair |
| Local over Small Creek | 1992 | 78 | Fair |
| 370TH St over Creek | 2012 | 71 | Good |
| Local over Creek | 1969 | 71 | Fair |
| Local over Creek | 1930 | 71 | Fair |
| Local over Dry Run | 1978 | 71 | Fair |
| Local over Pleasant Creek | 1950 | 71 | Fair |
| Local over Sugar Creek | 1957 | 71 | Fair |
| 45TH St over Copper Creek | 2020 | 70 | Good |
| 489TH Ave over Creek | 2012 | 70 | Fair |
| 525TH Ave over Small Creek | 2021 | 70 | Good |
| FM over Small Creek | 1969 | 70 | Fair |
| FM over Tete Des Morts River | 1995 | 70 | Fair |
| 143RD St over Small Stream | 2000 | 60 | Fair |
| 216 Ave over Creek | 2000 | 60 | Fair |
| 216TH Ave over Small Creek | 2000 | 60 | Poor |
| FM over N Fork Maquoketa River | 1961 | 60 | Fair |
| FM over S Fork Maquoketa River | 1961 | 60 | Fair |
| FM over Small Creek | 1967 | 60 | Poor |
| Local over Creek | 1981 | 60 | Fair |
| Local over Small Creek | 1958 | 60 | Poor |
| 364TH Ave over Sugar Creek | 2020 | 59 | Good |
| FM over Cline Branch | 1979 | 59 | Fair |
| Local over Creek | 2007 | 59 | Good |
| West St over Beer Creek | 1950 | 57 | Poor |
| FM over Bear Creek | 2003 | 50 | Good |
| FM over Brush Creek | 1980 | 50 | Fair |
| FM over Creek | 1956 | 50 | Fair |
| FM over Maquoketa River | 1927 | 50 | Poor |
| FM over Pleasant Creek | 1958 | 50 | Fair |
| Local over Creek | 1978 | 50 | Fair |
| Local over Small Creek | 1999 | 50 | Fair |
| Local over Stream | 1986 | 50 | Poor |
| Local over Tete De Morts Creek | 1982 | 50 | Fair |
| Local over Tete Des Morts Creek | 1981 | 50 | Fair |
| 175TH St over Tarecoat Creek | 2022 | 49 | Good |
| 208TH St over Creek | 2023 | 49 | Good |
| 297TH Ave over Brush Creek | 2019 | 49 | Good |
| 446TH Ave over Stream | 2023 | 49 | Good |
| Local over Creek | 1950 | 49 | Fair |
| 100TH Ave over Pumpkin Creek | 2021 | 45 | Good |
| 30TH Ave over S Fork Maquoketa River | 2014 | 45 | Good |
| FM over Creek | 1978 | 45 | Fair |
| FM over Small Stream | 1996 | 45 | Fair |
| Local over Creek | 1911 | 45 | Poor |
| Local over Creek | 1938 | 45 | Fair |
| 162ND St over Small Creek | 2017 | 44 | Good |
| 291ST Ave over Creek | 2017 | 44 | Good |
| FM over Creek | 1990 | 44 | Fair |
| Gi Bottoms Rd over Small Creek | 2015 | 44 | Good |
| 287TH St over Lytle Creek | 1986 | 40 | Poor |
| 50TH St over Small Stream | 1986 | 40 | Fair |
| 50TH St over Small Stream | 1986 | 40 | Poor |
| FM over Small Stream | 1986 | 40 | Poor |
| Local over Big Mill Creek | 1992 | 40 | Fair |
| Local over Creek | 1940 | 40 | Poor |
| Local over Creek | 1930 | 40 | Poor |
| Local over Deep Creek | 2004 | 40 | Fair |
| Local over Maquoketa River | 1958 | 40 | Fair |
| 222ND St over Spring Branch | 2023 | 39 | Good |
| 283RD St over Creek | 1910 | 39 | Fair |
| 287TH St over Lytle Creek | 2017 | 39 | Good |
| 475TH Ave over Small Unnamed Creek | 2022 | 39 | Good |
| Local over Small | 2009 | 39 | Fair |
| 224TH St over Creek | 2024 | 35 | Good |
| FM over Farmers Creek | 1993 | 35 | Good |
| 167TH St over Creek | 2015 | 34 | Good |
| Local over Brush Creek | 1981 | 34 | Poor |
| Local over Creek | 1998 | 34 | Fair |
| Local over Small Creek | 1940 | 34 | Poor |
| Local over Tete Des Morts River | 1979 | 34 | Fair |
| 224TH St over Small Creek | 2017 | 33 | Good |
| 175TH St over Farmers Creek | 2000 | 30 | Fair |
| 584TH Ave over Small Creek | 2016 | 30 | Good |
| Local over Brush Creek | 1960 | 30 | Poor |
| 383RD Ave over Sugar Creek | 2019 | 29 | Good |
| 584TH Ave over Small Creek | 2018 | 29 | Good |
| Local over Lytle Creek | 1999 | 29 | Good |
| Local over Small Creek | 1992 | 29 | Fair |
| 134TH St over Small Creek | 2021 | 26 | Good |
| 168TH Ave over Creek | 2018 | 26 | Fair |
| 576TH Ave over Small Creek | 2022 | 26 | Good |
| 64TH St over Creek | 2023 | 26 | Good |
| Local over Creek | 2001 | 26 | Fair |
| Local over Creek | 1999 | 26 | Fair |
| Local over Dry Run | 2001 | 26 | Fair |
| Local over Huntley Branch Creek | 1977 | 26 | Poor |
| Local over Small Creek | 1990 | 26 | Fair |
| Local over Small Stream | 1986 | 26 | Poor |
| 136TH St over Huntley Branch Creek | 2024 | 25 | Good |
| 216TH Ave over Creek | 2000 | 25 | Fair |
| Local over Bear Creek | 1983 | 25 | Fair |
| 242ND Ave over Creek | 2023 | 20 | Good |
| 269TH Ave over Small Creek | 2017 | 20 | Fair |
| East Line St over Beers Creek | 1902 | 20 | Poor |
| Local over Creek | 1950 | 20 | Good |
| Local over Creek | 1900 | 20 | Fair |
| Local over Creek | 1969 | 20 | Poor |
| Local over Creek | 2002 | 20 | Fair |
| Local over Small Creek | 1920 | 20 | Poor |
| Local over Tete De Morts Creek | 1984 | 20 | Poor |
| 188TH St over Lytle Creek | 2021 | 15 | Good |
| 258TH St over Small Stream | 2011 | 15 | Fair |
| 261ST Ave over Brush Creek | 2008 | 15 | Good |
| 344TH Ave over Small Creek | 2019 | 15 | Good |
| Local over Big Mill Creek | 1986 | 15 | Poor |
| Local over Creek | 2004 | 15 | Fair |
| Local over Creek | 2002 | 15 | Fair |
| Local over Tete Des Morts Creek | 1981 | 15 | Poor |
| 535 Ave over Creek | 2001 | 11 | Fair |
| 58TH St over Creek | 1940 | 11 | Poor |
| Local Rd over Stream | 1980 | 11 | Fair |
| Local over Creek | 2003 | 11 | Fair |
| Local over Creek | 2001 | 11 | Fair |
| Local over Creek | 1940 | 11 | Poor |
| Local over Pleasant Creek | 1998 | 11 | Fair |
| Local over Pumpkin Creek | 1950 | 11 | Poor |
| Local over Small Creek | 1981 | 11 | Fair |
| Local over Small Creek | 1940 | 11 | Poor |
| Local over Small Creek | 2001 | 11 | Fair |
| Local over Small Creek | 1930 | 11 | Fair |
| 289TH St over Dry Run | 1930 | 5 | Fair |
| Local over Mill Creek | 1959 | 5 | Fair |
| Rec. Traffic over Pleasant Creek | 1972 | 1 | Fair |