| FM over S Copper Creek | Poor | 55.1 ft | 1,070 | 1974 |
| FM over Duck Creek | Poor | 120.1 ft | 500 | 1950 |
| FM over N Fork Maquoketa River | Poor | 319.9 ft | 400 | 1952 |
| FM over Maquoketa River | Poor | 440.0 ft | 330 | 1950 |
| Local over Prairie Creek | Poor | 84.0 ft | 130 | 1971 |
| FM over Creek | Poor | 104.0 ft | 120 | 1977 |
| Local over Creek | Poor | 39.0 ft | 110 | 1938 |
| FM over S Fork Maquoketa River | Poor | 170.9 ft | 80 | 1982 |
| FM over Small | Poor | 43.0 ft | 80 | 1980 |
| Local over Small Creek | Poor | 44.0 ft | 60 | 1958 |
| FM over Small Creek | Poor | 36.1 ft | 60 | 1967 |
| 216th AVE over Small Creek | Poor | 20.0 ft | 60 | 2000 |
| West ST over Beer Creek | Poor | 24.0 ft | 57 | 1950 |
| FM over Maquoketa River | Poor | 456.0 ft | 50 | 1927 |
| Local over Stream | Poor | 39.0 ft | 50 | 1986 |
| Local over Creek | Poor | 33.1 ft | 45 | 1911 |
| 287th ST over Lytle Creek | Poor | 20.0 ft | 40 | 1986 |
| Local over Creek | Poor | 24.0 ft | 40 | 1940 |
| FM over Small Stream | Poor | 50.9 ft | 40 | 1986 |
| 50th ST over Small Stream | Poor | 25.9 ft | 40 | 1986 |
| Local over Creek | Poor | 20.0 ft | 40 | 1930 |
| Local over Brush Creek | Poor | 76.1 ft | 34 | 1981 |
| Local over Small Creek | Poor | 24.9 ft | 34 | 1940 |
| Local over Brush Creek | Poor | 149.9 ft | 30 | 1960 |
| Local over Small Stream | Poor | 46.9 ft | 26 | 1986 |
| Local over Huntley Branch Creek | Poor | 42.0 ft | 26 | 1977 |
| East Line ST over Beers Creek | Poor | 62.0 ft | 20 | 1902 |
| Local over Small Creek | Poor | 29.9 ft | 20 | 1920 |
| Local over Creek | Poor | 25.9 ft | 20 | 1969 |
| Local over Tete De Morts Creek | Poor | 60.0 ft | 20 | 1984 |
| Local over Big Mill Creek | Poor | 91.9 ft | 15 | 1986 |
| Local over Tete Des Morts Creek | Poor | 53.1 ft | 15 | 1981 |
| Local over Pumpkin Creek | Poor | 28.9 ft | 11 | 1950 |
| 58th ST over Creek | Poor | 24.9 ft | 11 | 1940 |
| Local over Small Creek | Poor | 23.0 ft | 11 | 1940 |
| Local over Creek | Poor | 25.9 ft | 11 | 1940 |
| US 61 NB over S Fork Maquoketa River | Fair | 374.0 ft | 5,100 | 1967 |
| US 61 SB over S Fork Maquoket River | Fair | 405.8 ft | 5,100 | 1998 |
| NB US 61 over Prairie Creek | Fair | 144.0 ft | 4,600 | 1967 |
| US 61 NB over N Fork Maquoketa River | Fair | 365.2 ft | 4,050 | 1967 |
| US 61 NB over Farmers Creek | Fair | 158.1 ft | 4,050 | 1966 |
| US 61 NB over Tarecod Creek | Fair | 131.9 ft | 4,050 | 1967 |
| Summit ST over US 61 | Fair | 232.0 ft | 3,277 | 1997 |
| South Main ST over U.s. 61 | Fair | 283.1 ft | 3,211 | 1996 |
| US 52 over Spruce Creek | Fair | 232.0 ft | 3,100 | 1986 |
| US 52 over Tete Des Morts Creek | Fair | 225.1 ft | 3,100 | 1986 |
| Ia 64 over South Copper Creek | Fair | 21.0 ft | 2,350 | 1984 |
| Ia 64 over Drainage Ditch | Fair | 24.9 ft | 2,200 | 1981 |
| Ia 64 over Bear Creek | Fair | 103.0 ft | 2,090 | 1982 |
| Ia 62 over Maquoketa River | Fair | 653.9 ft | 2,030 | 1957 |
| Ia 64 over Prairie Creek | Fair | 138.1 ft | 1,800 | 1976 |
| Summit ST over Over Aband Rr | Fair | 128.0 ft | 1,785 | 1973 |
| US 52 over Duck Creek | Fair | 211.0 ft | 1,590 | 1978 |
| US 52 over Pleasant Creek | Fair | 153.9 ft | 1,500 | 1978 |
| Ia 64 over Stream | Fair | 92.8 ft | 1,200 | 1976 |
| FM over Maquoketa River | Fair | 417.0 ft | 1,170 | 1966 |
| Ia 62 over Brush Creek | Fair | 159.1 ft | 1,100 | 1960 |
| FM over Copper Creek | Fair | 43.0 ft | 1,070 | 1974 |
| US 52 over Stream | Fair | 87.9 ft | 930 | 1978 |
| US 52 over Maquoketa River | Fair | 713.9 ft | 920 | 1956 |
| US 52 over Pincham Hollow Creek | Fair | 70.9 ft | 920 | 1978 |
| FM over Spruce Creek | Fair | 125.0 ft | 670 | 1982 |
| FM over Creek | Fair | 21.0 ft | 630 | 1985 |
| FM over Small Stream | Fair | 177.2 ft | 630 | 1998 |
| FM over Maquoketa River | Fair | 570.9 ft | 610 | 1956 |
| Bellevuecascade RD over Lost Creek | Fair | 128.0 ft | 590 | 1983 |
| FM over Farmers Creek | Fair | 116.1 ft | 570 | 1979 |
| FM over Creek | Fair | 24.9 ft | 570 | 1991 |
| 182 AVE over Drainage Ditch | Fair | 24.9 ft | 550 | 1997 |
| 182 AVE over Drainage Ditch | Fair | 21.0 ft | 540 | 1999 |
| Water Street over Creek | Fair | 34.1 ft | 510 | 1980 |
| FM over S Fork Maquoketa River | Fair | 410.1 ft | 510 | 1954 |
| FM over Creek | Fair | 26.9 ft | 500 | 1971 |
| FM over Creek | Fair | 40.0 ft | 500 | 1971 |
| FM over Small Creek | Fair | 23.0 ft | 500 | 1950 |
| Local RD over Br Spruce Creek | Fair | 60.0 ft | 499 | 1998 |
| FM over Maquoketa River | Fair | 569.9 ft | 430 | 1964 |
| FM over Lux Creek | Fair | 125.0 ft | 430 | 1961 |
| FM over Farmers Creek | Fair | 21.0 ft | 380 | 1990 |
| FM over Farmers Creek | Fair | 21.0 ft | 380 | 1979 |
| FM over Otter Creek | Fair | 38.1 ft | 370 | 1993 |
| FM over Creek | Fair | 24.9 ft | 370 | 1993 |
| FM over Creek | Fair | 113.8 ft | 330 | 1998 |
| FM over N Fork Maquoketa River | Fair | 298.9 ft | 290 | 2005 |
| Local over Small Creek | Fair | 42.0 ft | 279 | 1977 |
| FM 13th ST over Prairie Creek | Fair | 24.9 ft | 246 | 2000 |
| FM 13th ST over Silver Creek | Fair | 24.9 ft | 246 | 2000 |
| FM over Bear Creek | Fair | 125.0 ft | 240 | 1995 |
| Local RD over Small Creek | Fair | 32.2 ft | 239 | 1981 |
| Union ST over Farmers Creek | Fair | 24.9 ft | 230 | 1988 |
| FM over Creek | Fair | 23.0 ft | 230 | 1988 |
| FM over S Fork Maquoketa River | Fair | 375.0 ft | 230 | 1987 |
| FM over Creek | Fair | 87.9 ft | 230 | 1987 |
| FM over Small Creek | Fair | 125.0 ft | 226 | 1979 |
| FM over Small Creek | Fair | 24.9 ft | 177 | 1953 |
| FM over Creek | Fair | 29.9 ft | 170 | 2005 |
| Local over Stream | Fair | 26.9 ft | 157 | 1998 |
| School ST over Creek | Fair | 21.0 ft | 150 | 1984 |
| Local over Big Bear Creek | Fair | 150.9 ft | 137 | 1983 |
| Main ST over Deep Creek | Fair | 200.1 ft | 130 | 1990 |
| FM over Stream | Fair | 24.0 ft | 130 | 1959 |
| Local over Small Creek | Fair | 26.6 ft | 128 | 2007 |
| FM over Small | Fair | 21.0 ft | 120 | 1983 |
| Local over Small Creek | Fair | 29.9 ft | 110 | 2003 |
| Local over Small Creek | Fair | 21.0 ft | 108 | 1982 |
| Local over Creek | Fair | 25.9 ft | 99 | 1991 |
| Local over Small Creek | Fair | 124.0 ft | 90 | 1957 |
| Local over Creek | Fair | 40.0 ft | 90 | 1978 |
| FM over Small Creek | Fair | 20.0 ft | 90 | 1988 |
| Local over Small Creek | Fair | 79.1 ft | 79 | 1969 |
| Local over Small Creek | Fair | 29.9 ft | 79 | 1998 |
| Local over Brush Creek | Fair | 80.1 ft | 79 | 1985 |
| Local over Small Creek | Fair | 32.2 ft | 78 | 1992 |
| Local over Creek | Fair | 36.1 ft | 78 | 2002 |
| Local over Creek | Fair | 125.0 ft | 71 | 1969 |
| Local over Sugar Creek | Fair | 153.9 ft | 71 | 1957 |
| Local over Pleasant Creek | Fair | 60.0 ft | 71 | 1950 |
| Local over Dry Run | Fair | 24.0 ft | 71 | 1978 |
| Local over Creek | Fair | 30.8 ft | 71 | 1930 |
| 489th AVE over Creek | Fair | 33.1 ft | 70 | 2012 |
| FM over Small Creek | Fair | 24.0 ft | 70 | 1969 |
| FM over Tete Des Morts River | Fair | 129.9 ft | 70 | 1995 |
| Local over Creek | Fair | 41.0 ft | 60 | 1981 |
| FM over N Fork Maquoketa River | Fair | 299.9 ft | 60 | 1961 |
| FM over S Fork Maquoketa River | Fair | 319.9 ft | 60 | 1961 |
| 216 AVE over Creek | Fair | 45.9 ft | 60 | 2000 |
| 143rd ST over Small Stream | Fair | 24.9 ft | 60 | 2000 |
| FM over Cline Branch | Fair | 46.9 ft | 59 | 1979 |
| FM over Creek | Fair | 25.9 ft | 50 | 1956 |
| Local over Small Creek | Fair | 24.9 ft | 50 | 1999 |
| FM over Brush Creek | Fair | 125.0 ft | 50 | 1980 |
| FM over Pleasant Creek | Fair | 123.0 ft | 50 | 1958 |
| Local over Creek | Fair | 24.0 ft | 50 | 1978 |
| Local over Tete Des Morts Creek | Fair | 61.0 ft | 50 | 1981 |
| Local over Tete De Morts Creek | Fair | 71.9 ft | 50 | 1982 |
| Local over Creek | Fair | 26.9 ft | 49 | 1950 |
| FM over Creek | Fair | 30.8 ft | 45 | 1978 |
| Local over Creek | Fair | 20.0 ft | 45 | 1938 |
| FM over Small Stream | Fair | 25.9 ft | 45 | 1996 |
| FM over Creek | Fair | 29.9 ft | 44 | 1990 |
| Local over Deep Creek | Fair | 121.1 ft | 40 | 2004 |
| 50th ST over Small Stream | Fair | 34.1 ft | 40 | 1986 |
| Local over Maquoketa River | Fair | 323.2 ft | 40 | 1958 |
| Local over Big Mill Creek | Fair | 80.1 ft | 40 | 1992 |
| Local over Small | Fair | 24.9 ft | 39 | 2009 |
| 283rd ST over Creek | Fair | 22.0 ft | 39 | 1910 |
| Local over Tete Des Morts River | Fair | 40.0 ft | 34 | 1979 |
| Local over Creek | Fair | 24.9 ft | 34 | 1998 |
| 175th ST over Farmers Creek | Fair | 121.1 ft | 30 | 2000 |
| Local over Small Creek | Fair | 25.9 ft | 29 | 1992 |
| 168th AVE over Creek | Fair | 34.1 ft | 26 | 2018 |
| Local over Small Creek | Fair | 80.1 ft | 26 | 1990 |
| Local over Creek | Fair | 29.9 ft | 26 | 2001 |
| Local over Creek | Fair | 24.9 ft | 26 | 1999 |
| Local over Dry Run | Fair | 40.0 ft | 26 | 2001 |
| Local over Bear Creek | Fair | 125.0 ft | 25 | 1983 |
| 216th AVE over Creek | Fair | 24.9 ft | 25 | 2000 |
| Local over Creek | Fair | 23.0 ft | 20 | 1900 |
| 269th AVE over Small Creek | Fair | 28.5 ft | 20 | 2017 |
| Local over Creek | Fair | 82.0 ft | 20 | 2002 |
| Local over Creek | Fair | 25.9 ft | 15 | 2004 |
| Local over Creek | Fair | 80.1 ft | 15 | 2002 |
| 258th ST over Small Stream | Fair | 24.9 ft | 15 | 2011 |
| Local over Creek | Fair | 32.2 ft | 11 | 2003 |
| Local RD over Stream | Fair | 29.9 ft | 11 | 1980 |
| Local over Small Creek | Fair | 60.0 ft | 11 | 1981 |
| Local over Small Creek | Fair | 89.9 ft | 11 | 2001 |
| Local over Pleasant Creek | Fair | 60.0 ft | 11 | 1998 |
| Local over Small Creek | Fair | 32.2 ft | 11 | 1930 |
| Local over Creek | Fair | 85.0 ft | 11 | 2001 |
| 535 AVE over Creek | Fair | 20.0 ft | 11 | 2001 |
| 289th ST over Dry Run | Fair | 24.0 ft | 5 | 1930 |
| Local over Mill Creek | Fair | 33.1 ft | 5 | 1959 |
| Rec. Traffic over Pleasant Creek | Fair | 49.9 ft | 1 | 1972 |
| US 61 over Drainage Ditch | Good | 34.1 ft | 8,100 | 1967 |
| Y53 200th AVE over Prairie Creek | Good | 92.8 ft | 7,205 | 2022 |
| SB US 61 over Prairie Creek | Good | 147.0 ft | 4,600 | 1996 |
| US 61 NB over Farmers Creek | Good | 158.1 ft | 4,050 | 1966 |
| US 61 SB over N Fork Maquoketa River | Good | 368.1 ft | 4,050 | 1996 |
| US 61 SB over Farmers Creek | Good | 159.1 ft | 4,050 | 1998 |
| US 61 SB over Farmers Creek | Good | 158.1 ft | 4,050 | 1996 |
| US 61 SB over Tare Cod Creek | Good | 133.9 ft | 4,050 | 1996 |
| NB US 61 over Ia 64 | Good | 203.1 ft | 3,550 | 1997 |
| SB US 61 over Ia 64 | Good | 203.1 ft | 3,550 | 1997 |
| US 52 over Dme Rr | Good | 354.0 ft | 3,100 | 1996 |
| US 52 over Stream | Good | 22.0 ft | 3,100 | 1986 |
| US 52 over Cp Rr/mill Creek | Good | 657.2 ft | 2,640 | 2009 |
| US 52 over Dme Rr | Good | 193.9 ft | 2,330 | 1993 |
| Ia 64 over Deep Creek | Good | 269.0 ft | 2,290 | 1984 |
| US 52 & Ia 64 over Mississippi River | Good | 2454.1 ft | 2,150 | 2017 |
| US 52 & Ia 64 over Mississippi R Overflow | Good | 381.2 ft | 2,150 | 2018 |
| Ia 64 over Big Bear Creek | Good | 183.1 ft | 2,090 | 1982 |
| Ia 62 over Mill Creek | Good | 149.9 ft | 1,930 | 1976 |
| Ia 64 over Grants Creek | Good | 24.9 ft | 1,890 | 1984 |
| FM over So Fk Maquoketa River | Good | 324.1 ft | 1,730 | 1999 |
| Ia 62 over Little Mill Creek | Good | 138.1 ft | 1,100 | 1976 |
| US 52 over Beaver Creek | Good | 128.0 ft | 930 | 1984 |
| US 52 over Twin Springs Creek | Good | 92.8 ft | 930 | 1978 |
| Ia 64 over No Branch Elk Creek | Good | 32.2 ft | 930 | 1984 |
| US 52 over Br Of Coons Creek | Good | 58.1 ft | 920 | 1978 |
| D61 over Lytles Creek | Good | 163.7 ft | 660 | 2016 |
| Division ST over Beers Creek | Good | 130.6 ft | 629 | 2018 |
| 150th ST over Brush Creek | Good | 140.1 ft | 550 | 2011 |
| E17 150th ST over Jessie Branch | Good | 86.9 ft | 540 | 2018 |
| South Main ST over Farmers Creek | Good | 38.1 ft | 440 | 2017 |
| 35th ST over Mill Creek | Good | 149.9 ft | 236 | 2019 |
| 341st ST over Small Creek | Good | 49.9 ft | 235 | 2020 |
| 49th Street over Creek | Good | 100.1 ft | 207 | 2023 |
| Centerville RD over Tete Des Morts Creek | Good | 129.9 ft | 190 | 2012 |
| FM over Creek | Good | 174.9 ft | 150 | 2004 |
| High Bridge RD over Small Stream | Good | 30.5 ft | 137 | 2020 |
| D57 Mill Creek RD over Small Stream | Good | 80.1 ft | 128 | 2020 |
| 140th AVE over Otter Creek | Good | 103.0 ft | 120 | 2014 |
| FM over Copper Creek | Good | 112.9 ft | 100 | 1993 |
| 216th ST over Little Mill Creek | Good | 35.1 ft | 88 | 2022 |
| 400th ST over Lux Creek | Good | 83.7 ft | 78 | 2021 |
| 21st Street over South Copper Creek | Good | 35.1 ft | 78 | 2023 |
| 370th ST over Creek | Good | 33.1 ft | 71 | 2012 |
| 45th ST over Copper Creek | Good | 34.1 ft | 70 | 2020 |
| 525th AVE over Small Creek | Good | 39.0 ft | 70 | 2021 |
| Local over Creek | Good | 25.9 ft | 59 | 2007 |
| 364th AVE over Sugar Creek | Good | 40.0 ft | 59 | 2020 |
| FM over Bear Creek | Good | 157.2 ft | 50 | 2003 |
| 446th AVE over Stream | Good | 40.0 ft | 49 | 2023 |
| 175th ST over Tarecoat Creek | Good | 49.9 ft | 49 | 2022 |
| 297th AVE over Brush Creek | Good | 123.0 ft | 49 | 2019 |
| 208th ST over Creek | Good | 40.0 ft | 49 | 2023 |
| 100th AVE over Pumpkin Creek | Good | 34.1 ft | 45 | 2021 |
| 30th AVE over S Fork Maquoketa River | Good | 292.0 ft | 45 | 2014 |
| 162nd ST over Small Creek | Good | 83.0 ft | 44 | 2017 |
| Gi Bottoms RD over Small Creek | Good | 30.8 ft | 44 | 2015 |
| 291st AVE over Creek | Good | 44.6 ft | 44 | 2017 |
| 475th AVE over Small Unnamed Creek | Good | 73.2 ft | 39 | 2022 |
| 287th ST over Lytle Creek | Good | 143.0 ft | 39 | 2017 |
| 222nd ST over Spring Branch | Good | 32.2 ft | 39 | 2023 |
| FM over Farmers Creek | Good | 128.0 ft | 35 | 1993 |
| 224th ST over Creek | Good | 24.9 ft | 35 | 2024 |
| 167th ST over Creek | Good | 40.0 ft | 34 | 2015 |
| 224th ST over Small Creek | Good | 29.9 ft | 33 | 2017 |
| 584th AVE over Small Creek | Good | 34.4 ft | 30 | 2016 |
| 383rd AVE over Sugar Creek | Good | 50.9 ft | 29 | 2019 |
| 584th AVE over Small Creek | Good | 39.4 ft | 29 | 2018 |
| Local over Lytle Creek | Good | 229.0 ft | 29 | 1999 |
| 576th AVE over Small Creek | Good | 29.9 ft | 26 | 2022 |
| 64th ST over Creek | Good | 24.9 ft | 26 | 2023 |
| 134th ST over Small Creek | Good | 28.9 ft | 26 | 2021 |
| 136th ST over Huntley Branch Creek | Good | 29.9 ft | 25 | 2024 |
| Local over Creek | Good | 30.8 ft | 20 | 1950 |
| 242nd AVE over Creek | Good | 26.9 ft | 20 | 2023 |
| 344th AVE over Small Creek | Good | 44.9 ft | 15 | 2019 |
| 188th ST over Lytle Creek | Good | 129.9 ft | 15 | 2021 |
| 261st AVE over Brush Creek | Good | 163.1 ft | 15 | 2008 |