| 3rd AVE SW over N Fork Maquoketa River | Poor | 125.0 ft | 1,651 | 1967 |
| Local over South Fork Catfish Creek | Poor | 58.1 ft | 756 | 1926 |
| FM over Small | Poor | 100.1 ft | 540 | 1996 |
| Wildwood DR over Bee Branch | Poor | 23.0 ft | 537 | 1970 |
| Local over Catfish Creek | Poor | 90.9 ft | 530 | 1980 |
| Dyersville East RD over Creek | Poor | 33.1 ft | 511 | 1964 |
| FM over Creek | Poor | 33.1 ft | 490 | 1962 |
| FM over Creek | Poor | 46.9 ft | 310 | 1920 |
| Local over Creek | Poor | 44.9 ft | 206 | 1998 |
| Local over Creek | Poor | 44.9 ft | 130 | 1997 |
| Fish Pond RD over Creek | Poor | 42.0 ft | 128 | 1997 |
| Local over Creek | Poor | 34.1 ft | 120 | 1940 |
| Local over Creek | Poor | 42.0 ft | 110 | 1936 |
| Local over Stream | Poor | 60.0 ft | 90 | 1981 |
| Local over Creek | Poor | 53.1 ft | 78 | 1928 |
| FM over Lytle Creek | Poor | 41.0 ft | 50 | 1977 |
| Local over Granger Creek | Poor | 127.0 ft | 45 | 1925 |
| Local over Creek | Poor | 28.9 ft | 44 | 1925 |
| FM over Creek | Poor | 85.0 ft | 39 | 1950 |
| Local over Creek | Poor | 25.9 ft | 30 | 1925 |
| FM over Stream | Poor | 42.0 ft | 25 | 1941 |
| Local over Creek | Poor | 41.0 ft | 20 | 1940 |
| Local over Creek | Poor | 24.9 ft | 20 | 1971 |
| Creek Branch Lane over Prairie Creek | Poor | 113.8 ft | 11 | 1900 |
| Entrance over Side Ditch Bridge | Poor | 39.0 ft | 10 | 1912 |
| US 20 over N Branch Catfish Creek | Fair | 38.1 ft | 33,600 | 1939 |
| US 61 & 151 over Peosta Chl & City ST | Fair | 4029.9 ft | 22,300 | 1991 |
| US 61 & 151 over Mississippi River Island | Fair | 2950.1 ft | 20,400 | 1982 |
| US 20 US 52 over Drainage Ditch | Fair | 24.0 ft | 18,500 | 1957 |
| US 20 over Miss. River HWY & Rr | Fair | 5759.8 ft | 17,700 | 1943 |
| WB US 20 over Mid Br Catfish Ck Cc Rr | Fair | 384.8 ft | 14,300 | 1961 |
| NB US 61/151 over 4th 5th White ST | Fair | 743.1 ft | 13,200 | 1992 |
| US 61/151 SB over 4th 5th White ST | Fair | 860.9 ft | 12,300 | 1992 |
| NB US 61 over 11th ST | Fair | 205.1 ft | 11,150 | 1992 |
| SB US 61 over 11th ST | Fair | 205.1 ft | 11,150 | 1992 |
| Cedar Cross RD over Middle Fork Catfish Crk | Fair | 288.1 ft | 10,390 | 1985 |
| US 151 NB over White Water Creek | Fair | 221.1 ft | 9,300 | 1971 |
| East 16th ST over Lake Peosta Channel | Fair | 347.1 ft | 9,191 | 1982 |
| US 61 over Otter Creek | Fair | 32.2 ft | 9,000 | 1967 |
| US 61 over Buncombe Creek | Fair | 32.2 ft | 8,900 | 1967 |
| US 20 EB US 52 SB over Y 17 (epworth) | Fair | 170.9 ft | 6,750 | 1988 |
| SB US 61 & 151 over Ia 946 & City Sts& Ccp R | Fair | 1370.1 ft | 6,150 | 1990 |
| NB US 61 & 151 over Ia 946 & City Sts& Ccp R | Fair | 1435.0 ft | 6,100 | 1990 |
| Grandview AVE over US 61 & 151 | Fair | 73.2 ft | 5,594 | 1957 |
| 1 ST Ave. W over N Fork Maquoketa River | Fair | 153.9 ft | 5,495 | 1979 |
| WB US 20 over N Fork Maquoketa River | Fair | 502.0 ft | 5,450 | 1958 |
| EB US 20 over N Fork Maquoketa River | Fair | 503.0 ft | 5,400 | 1986 |
| Old Mill RD over Catfish Creek | Fair | 154.9 ft | 5,395 | 1978 |
| NB NW Arterial over Over Cc Rr & Catfish Ck | Fair | 296.9 ft | 5,295 | 1982 |
| Ia 3 over Little Maquoketa River | Fair | 243.1 ft | 5,100 | 1947 |
| Fremont AVE over Catfish Creek Cc Rr | Fair | 317.9 ft | 5,041 | 1996 |
| University AVE over North Fork Catfish Creek | Fair | 24.9 ft | 4,131 | 2006 |
| US 52 over N Fork Maquoketa River | Fair | 180.1 ft | 3,990 | 1985 |
| S John Deere RD over Sageville Drainage Ditch | Fair | 24.9 ft | 3,736 | 2002 |
| Seippel RD over Middle Fork Catfish Crk | Fair | 29.9 ft | 3,632 | 1949 |
| US 52 over Drainage Ditch | Fair | 26.9 ft | 3,340 | 1945 |
| Rockdale RD over Over Cc Rr & Catfish Ck | Fair | 606.0 ft | 3,302 | 1986 |
| Chavenelle RD over Mid Fk Catfish Creek | Fair | 24.9 ft | 3,011 | 1998 |
| US 52 over Drainage Ditch | Fair | 24.9 ft | 2,860 | 1985 |
| Ia 136 over Br Durien Creek | Fair | 128.0 ft | 2,520 | 1985 |
| 1st AVE over N Fork Maquoketa River | Fair | 152.9 ft | 2,428 | 1915 |
| 3rd ST SW over Bear Creek | Fair | 125.0 ft | 2,333 | 1966 |
| Sycamore ST over Bee Branch | Fair | 95.1 ft | 2,147 | 2011 |
| Ia 136 over Branch Maquoketa River | Fair | 27.9 ft | 2,140 | 1934 |
| Ia 136 over Branch Maquoketa River | Fair | 24.0 ft | 2,140 | 1934 |
| Key Way over North Fork Catfish Creek | Fair | 31.5 ft | 1,932 | 2010 |
| 12th St. N.e. over Hewetts Creek | Fair | 100.1 ft | 1,778 | 1995 |
| Beltline NW over Maquoketa River | Fair | 125.0 ft | 1,738 | 1987 |
| Ia 3 over N Fork Maquoketa River | Fair | 103.0 ft | 1,720 | 1968 |
| Ia 3 over Branch Maquoketa River | Fair | 31.8 ft | 1,690 | 1931 |
| Ia 3 over Branch Maquoketa River | Fair | 25.9 ft | 1,680 | 1931 |
| Ia 3 over N Fork Little Maquoketa | Fair | 153.9 ft | 1,680 | 1967 |
| 2nd ST NE over N Fork Maquoketa River | Fair | 127.0 ft | 1,525 | 1979 |
| FM over Cloie Creek | Fair | 34.1 ft | 1,159 | 1992 |
| John Deere RD W over Small Natural Stream | Fair | 26.9 ft | 890 | 2001 |
| FM over Little Maquoketa River | Fair | 128.0 ft | 890 | 1983 |
| Local over N.fork Maquoketa River | Fair | 128.0 ft | 790 | 1967 |
| FM over Small Stream | Fair | 32.2 ft | 769 | 1950 |
| FM over Small | Fair | 33.1 ft | 720 | 1978 |
| FM over Johns Creek | Fair | 78.1 ft | 680 | 1972 |
| Graf RD over Creek | Fair | 21.0 ft | 678 | 1985 |
| FM over Prairie Creek | Fair | 128.0 ft | 650 | 1991 |
| FM over Kidder Creek | Fair | 128.0 ft | 619 | 1985 |
| FM over White Water Creek | Fair | 26.9 ft | 590 | 1988 |
| FM over Johns Creek | Fair | 90.9 ft | 590 | 1991 |
| Graf RD over Little Maquoketa River | Fair | 125.0 ft | 560 | 2006 |
| Creekwood DR over Catfish Creek | Fair | 155.8 ft | 549 | 2006 |
| FM over White Water Creek | Fair | 101.0 ft | 530 | 1996 |
| FM over White Water Creek | Fair | 101.0 ft | 530 | 1996 |
| Kemp RD over Creek | Fair | 26.9 ft | 520 | 2000 |
| FM over White Water Creek | Fair | 77.1 ft | 511 | 1966 |
| Local over Granger Creek | Fair | 90.9 ft | 480 | 1975 |
| Lake Eleanor RD over Small Stream | Fair | 20.0 ft | 480 | 1980 |
| FM over Creek | Fair | 78.1 ft | 462 | 1975 |
| FM over Catfish Creek | Fair | 125.0 ft | 450 | 1998 |
| Monroe ST NE over Creek | Fair | 21.0 ft | 424 | 1929 |
| FM over Maquoketa River | Fair | 128.0 ft | 412 | 1984 |
| Jacoby DR W over Drainage Ditch | Fair | 27.9 ft | 379 | 1960 |
| FM over Middle Maquoketa River | Fair | 154.9 ft | 350 | 1974 |
| Manson RD over Catfish Creek | Fair | 136.2 ft | 340 | 2002 |
| Local over Middle Fork Maquoketa | Fair | 103.0 ft | 290 | 1972 |
| Local over Little Maquoketa River | Fair | 128.0 ft | 274 | 1984 |
| FM over Lytle Creek | Fair | 191.9 ft | 260 | 1992 |
| FM over Small | Fair | 23.0 ft | 250 | 1942 |
| Kane RD over Creek | Fair | 36.1 ft | 240 | 2000 |
| FM over N. Fork Little Maquoketa | Fair | 100.1 ft | 240 | 2001 |
| FM over Hewitt Creek | Fair | 36.1 ft | 226 | 1983 |
| FM over Hewitt Creek | Fair | 36.1 ft | 226 | 1983 |
| FM over Small | Fair | 26.9 ft | 216 | 1983 |
| Local over Creek | Fair | 23.0 ft | 216 | 1955 |
| FM over Creek | Fair | 23.0 ft | 190 | 1960 |
| US 151 over US 61 | Fair | 309.1 ft | 160 | 1970 |
| Local over Creek | Fair | 26.9 ft | 160 | 1957 |
| Calonder RD over Middle Maquoketa River | Fair | 116.1 ft | 160 | 1974 |
| FM over Creek | Fair | 23.0 ft | 160 | 1946 |
| Dutch Lane RD over White Water Creek | Fair | 80.1 ft | 151 | 2012 |
| Local over Creek | Fair | 24.0 ft | 140 | 1993 |
| FM over Johns Creek | Fair | 125.0 ft | 130 | 2001 |
| Main ST over Otter Creek | Fair | 52.2 ft | 120 | 1970 |
| Local over Prairie Creek | Fair | 71.9 ft | 118 | 1930 |
| Local over Creek | Fair | 32.2 ft | 97 | 1988 |
| FM over Creek | Fair | 28.9 ft | 80 | 2001 |
| Local over Creek | Fair | 103.0 ft | 80 | 1973 |
| Local over Stream | Fair | 56.1 ft | 80 | 1981 |
| Local over Little Maquoketa River | Fair | 207.0 ft | 80 | 1978 |
| Local over Creek | Fair | 50.9 ft | 79 | 2002 |
| Local over Small | Fair | 36.1 ft | 79 | 1983 |
| Local over White Water Creek | Fair | 81.0 ft | 71 | 1982 |
| FM over Small | Fair | 22.0 ft | 71 | 1980 |
| Chesterman RD over Creek | Fair | 44.6 ft | 71 | 2014 |
| Local over Creek | Fair | 45.9 ft | 70 | 1900 |
| Local over Creek | Fair | 24.0 ft | 60 | 2002 |
| Local over Small | Fair | 41.0 ft | 60 | 1979 |
| FM over Creek | Fair | 24.9 ft | 59 | 1973 |
| Local over Small | Fair | 26.9 ft | 50 | 1979 |
| Local over Small Stream | Fair | 78.1 ft | 50 | 1986 |
| Local over Sm Creek | Fair | 26.9 ft | 50 | 1950 |
| Local over Creek | Fair | 26.9 ft | 49 | 1900 |
| Rupp Halllow RD over Roadside Ditch | Fair | 21.0 ft | 49 | 1980 |
| Local over Lytle Creek | Fair | 65.9 ft | 45 | 1981 |
| Local over Prairie Creek | Fair | 123.0 ft | 45 | 1946 |
| FM over Small Stream | Fair | 41.0 ft | 45 | 1895 |
| Local over Creek | Fair | 20.0 ft | 44 | 2001 |
| Local over Curran Branch | Fair | 61.0 ft | 40 | 1938 |
| Local over Small Stream | Fair | 36.1 ft | 40 | 1900 |
| Buncombe RD over Buncombe Creek | Fair | 29.9 ft | 34 | 2001 |
| Local over Small Stream | Fair | 33.1 ft | 34 | 1986 |
| Hosch RD over Creek | Fair | 30.8 ft | 34 | 1926 |
| Local over Small | Fair | 77.1 ft | 30 | 1977 |
| Local over Buncombe Creek | Fair | 32.2 ft | 30 | 1996 |
| Lattnerville Lane over Creek | Fair | 41.0 ft | 30 | 1955 |
| Local over Creek | Fair | 26.9 ft | 26 | 1946 |
| Steger RD over N Br Maquoketa River | Fair | 21.0 ft | 26 | 2017 |
| Local over Whitewater Creek | Fair | 63.0 ft | 25 | 1979 |
| FM over Granger Creek | Fair | 44.9 ft | 25 | 2009 |
| Local over Buncombe Creek | Fair | 32.2 ft | 20 | 1993 |
| Local over Johns Creek | Fair | 38.1 ft | 20 | 1979 |
| Millville RD over Stream | Fair | 42.0 ft | 20 | 2017 |
| Fettkether Lane over No Fork Little Maquoketa | Fair | 43.0 ft | 20 | 2017 |
| Local over Stream | Fair | 30.8 ft | 15 | 1981 |
| Conrad Lane over Whitewater Creek | Fair | 69.9 ft | 11 | 2022 |
| Local RD over Creek | Fair | 20.0 ft | 11 | 1998 |
| Rooster LN over Side Ditch Bridge | Fair | 25.9 ft | 10 | 1965 |
| Entrance over Side Ditch | Fair | 32.2 ft | 10 | 2017 |
| Klaren RD over Creek | Fair | 32.2 ft | 5 | 1941 |
| Local over Creek | Fair | 39.0 ft | 5 | 1900 |
| EB US 20 over Mid Br Catfish Ck Cc Rr | Good | 414.0 ft | 14,300 | 1995 |
| US 20 US 52 over Drainage Ditch | Good | 26.9 ft | 12,500 | 1960 |
| NB US 61/151 over East 9th ST & Cn Rr | Good | 418.0 ft | 11,150 | 1992 |
| SB US 61/151 over East 9th ST & Cn Rr | Good | 469.2 ft | 11,150 | 1992 |
| NB US 61/151 over 7th ST | Good | 128.0 ft | 11,150 | 1992 |
| SB US 61/151 over 7th ST | Good | 128.0 ft | 11,150 | 1992 |
| Central AVE over Union Hollow | Good | 26.9 ft | 9,690 | 1967 |
| US 61 & 151 SB over Catfish CR Ccp Rr & RD | Good | 525.3 ft | 9,600 | 2014 |
| US 61 & 151 NB over Catfish CR Ccp Rr & RD | Good | 525.3 ft | 9,550 | 2014 |
| US 20 EB over S Fork Catfish Creek | Good | 246.4 ft | 8,700 | 2017 |
| US 20 WB over S Fork Catfish Creek | Good | 246.4 ft | 8,700 | 2018 |
| Fengler ST over Over Imrl Rr | Good | 164.0 ft | 7,692 | 2002 |
| US 20 & 52 over Drainage Ditch | Good | 26.9 ft | 7,200 | 1988 |
| US 52 over Fork Granger Creek | Good | 25.9 ft | 7,000 | 1997 |
| US 52 over Granger Creek | Good | 180.1 ft | 7,000 | 1997 |
| US 20 WB US 52 NB over Y 17 (epworth) | Good | 170.9 ft | 6,800 | 1988 |
| Grandview AVE over US 20 | Good | 150.9 ft | 6,494 | 1996 |
| Y21 Sundown RD over US 20 US 52 | Good | 256.9 ft | 6,285 | 1987 |
| Hill-bryant ST over US 20 | Good | 247.0 ft | 6,162 | 1996 |
| US 52 over US 20 | Good | 659.1 ft | 6,000 | 2019 |
| US 151 NB over Branch Prairie Creek | Good | 171.9 ft | 5,500 | 1970 |
| E 32nd St-peru over Bordeaux Run | Good | 33.1 ft | 5,395 | 1993 |
| US 20 EB US 52 SB over 1st ST S | Good | 159.1 ft | 5,350 | 1988 |
| US 20 WB US 52 NB over 1st ST S | Good | 155.8 ft | 5,350 | 1988 |
| Ia 3 over Stream | Good | 94.2 ft | 5,100 | 1974 |
| US 52 over Hewitt Creek | Good | 158.1 ft | 5,100 | 1985 |
| US 151 SB over Ind Park Road | Good | 164.0 ft | 4,750 | 2002 |
| US 151 SB over Whitewater Creek | Good | 228.0 ft | 4,750 | 2003 |
| SB NW Arterial over Over Cc Rr & Catfish Ck | Good | 298.9 ft | 4,696 | 1997 |
| US 151 SB over Aitchison Road | Good | 153.9 ft | 4,650 | 2002 |
| Rhomberg AVE over Bee Branch | Good | 90.9 ft | 4,648 | 2017 |
| US 151 NB over Aitchison Road | Good | 153.9 ft | 4,550 | 2002 |
| US 151 NB over N Fork Maquoketa River | Good | 778.9 ft | 4,550 | 2002 |
| US 151 SB over N Fork Maquoketa River | Good | 778.9 ft | 4,550 | 2002 |
| US 151 SB over Ia 136 | Good | 137.1 ft | 4,350 | 2002 |
| W 32nd Street over Bee Branch | Good | 20.0 ft | 4,322 | 2009 |
| E 16th ST over Bee Branch | Good | 105.0 ft | 4,265 | 2011 |
| US 151 (nb/eb) over Ia 136 | Good | 137.1 ft | 4,250 | 2002 |
| East 22nd ST over Bee Branch | Good | 90.9 ft | 4,246 | 2017 |
| US 151 NB over Ind Park Road | Good | 164.0 ft | 4,100 | 2002 |
| SB US 61 Ramp over Vacant Lots | Good | 577.1 ft | 3,820 | 1991 |
| NB US 61 Ramp over Vacant Lots | Good | 580.1 ft | 3,650 | 1991 |
| EB US 20 over US 52 SB | Good | 195.9 ft | 3,600 | 1987 |
| WB US 20 over US 52 SB | Good | 195.9 ft | 3,600 | 1987 |
| Fremont AVE over US 20 | Good | 157.2 ft | 3,596 | 1996 |
| Ia 946 NB over Valley ST | Good | 146.0 ft | 3,400 | 1990 |
| Ia 946 SB over Valley ST | Good | 149.9 ft | 3,400 | 1990 |
| NW Arterial SB over West 32nd Street | Good | 123.0 ft | 3,397 | 2002 |
| US 52 over Lux Creek | Good | 28.9 ft | 3,340 | 1986 |
| US 52 SB over Catfish Creek | Good | 628.9 ft | 3,200 | 2019 |
| US 52 NB over Catfish Creek | Good | 669.0 ft | 3,150 | 2019 |
| NW Arterial NB over West 32nd Street | Good | 123.0 ft | 2,947 | 2002 |
| US 151 SB over Prarie Creek | Good | 173.9 ft | 2,800 | 2003 |
| 3rd ST over US 61 & 151 | Good | 724.1 ft | 2,428 | 1991 |
| US 20 EB On Ramp over S Fork Catfish Creek | Good | 237.9 ft | 2,420 | 2019 |
| N Cascade RD over South Fork Catfish Creek | Good | 181.1 ft | 2,259 | 2012 |
| N Cascade RD over US 52 | Good | 275.9 ft | 2,259 | 2011 |
| Ia 136 over N Fork Maquoketa River | Good | 236.9 ft | 2,140 | 2017 |
| Herber RD over Little Maquoketa River | Good | 576.1 ft | 1,910 | 2015 |
| Herber RD over Drainage Ditch | Good | 31.5 ft | 1,910 | 2015 |
| FM over Creek | Good | 26.9 ft | 1,880 | 1990 |
| Old Highway Road over Ccp Railroad | Good | 154.2 ft | 1,876 | 2023 |
| Military RD over US 52 | Good | 365.2 ft | 1,817 | 2017 |
| US 52 over US 61/151 Granger Creek | Good | 565.6 ft | 1,810 | 2019 |
| US 52 SB Ramp Loop over Granger Creek | Good | 38.7 ft | 1,770 | 2019 |
| US 20 On Ramp over S Fork Catfish Creek | Good | 229.3 ft | 1,570 | 2018 |
| Hales Mill RD over Creek | Good | 103.0 ft | 1,375 | 2018 |
| FM over Lytle Creek | Good | 34.1 ft | 1,270 | 1982 |
| Monastary RD over Catfish Creek | Good | 45.9 ft | 1,160 | 2010 |
| FM over Bloody Run Creek | Good | 80.1 ft | 1,119 | 2001 |
| 7th St-y 13 over US 20 & 52 | Good | 431.1 ft | 1,089 | 1989 |
| US 20 Ramps over Drainage Ditch | Good | 22.0 ft | 1,010 | 1988 |
| FM over Creek | Good | 25.9 ft | 913 | 2001 |
| Local over Creek | Good | 24.9 ft | 900 | 2009 |
| FM over Creek | Good | 26.9 ft | 900 | 2002 |
| FM over Creek | Good | 25.9 ft | 884 | 2002 |
| Brunskill RD over North Catfish Creek | Good | 109.9 ft | 865 | 2013 |
| Elmwood DR over Granger Creek | Good | 25.6 ft | 770 | 2009 |
| US 61 Off Ramp over Granger Creek | Good | 266.4 ft | 756 | 2019 |
| FM over Catfish Creek | Good | 143.0 ft | 737 | 2017 |
| Local over Little Maquoketa River | Good | 246.1 ft | 737 | 1992 |
| Louise Lane over Bordeaux Run | Good | 30.8 ft | 684 | 2009 |
| Farley RD over Stream | Good | 24.9 ft | 680 | 2009 |
| FM over Creek | Good | 24.9 ft | 680 | 2009 |
| FM over Creek | Good | 24.9 ft | 668 | 2009 |
| English Mill RD over US 52 | Good | 285.1 ft | 640 | 2017 |
| Derby Grange RD over Cloie Branch | Good | 103.0 ft | 638 | 2020 |
| Derby Grange RD over Cloie Branch | Good | 24.0 ft | 638 | 2011 |
| Y17 Gun Club RD over Little Maquoketa River | Good | 152.9 ft | 619 | 2021 |
| FM over Little Maquoketa River | Good | 226.0 ft | 530 | 2005 |
| Kemp RD over Creek | Good | 70.5 ft | 511 | 2017 |
| FM over Creek | Good | 21.0 ft | 510 | 1977 |
| Tyler ST NE over Creek | Good | 21.0 ft | 509 | 2005 |
| E Worthington over Johns Creek | Good | 100.1 ft | 481 | 2013 |
| Olde Massey RD over Creek | Good | 32.2 ft | 471 | 2018 |
| FM over Creek | Good | 23.0 ft | 450 | 2006 |
| N Cascade Connectr over US 52 | Good | 245.1 ft | 432 | 2018 |
| Graf Road over Stream | Good | 32.2 ft | 420 | 2024 |
| Cottingham RD over Creek | Good | 83.0 ft | 412 | 2017 |
| Cottingham RD over S Fork Catfish Creek | Good | 70.5 ft | 412 | 2017 |
| Main ST over Drainage | Good | 109.9 ft | 400 | 2011 |
| Thunder Road over N Fork Maquoketa River | Good | 83.0 ft | 380 | 2024 |
| FM over Lytle Creek | Good | 165.0 ft | 370 | 1994 |
| 6th St. S.e. over Small Stream | Good | 29.9 ft | 349 | 1987 |
| Finleys Landing over Basswood Creek | Good | 25.9 ft | 329 | 2010 |
| Finleys Landing over Basswood Creek | Good | 21.7 ft | 329 | 2010 |
| Massey Marina Lane over Small Creek | Good | 50.9 ft | 320 | 2018 |
| Y21 Budd RD over Creek | Good | 32.2 ft | 314 | 2018 |
| FM over Little Maquoketa River | Good | 122.0 ft | 314 | 2006 |
| Durango RD over Creek | Good | 92.8 ft | 314 | 2017 |
| Local over Little Maquoketa River | Good | 226.0 ft | 304 | 2004 |
| Hammerand RD over Bloody Run Creek | Good | 92.8 ft | 285 | 2022 |
| Simon RD over Whitewater Creek | Good | 204.4 ft | 275 | 2021 |
| South Mound RD over No Fork Maquoketa River | Good | 112.9 ft | 250 | 2016 |
| Christoph RD over No Fork Maquoketa River | Good | 152.9 ft | 207 | 2019 |
| Swiss Valley Road over US 20 | Good | 224.4 ft | 196 | 2021 |
| X71 Clear Creek RD over Stream | Good | 52.2 ft | 170 | 2024 |
| X71 Clear Creek RD over Creek | Good | 73.2 ft | 167 | 2018 |
| Calonder RD over Creek | Good | 23.0 ft | 157 | 1995 |
| Fish Pond Road over Little Maquoketa River | Good | 83.0 ft | 130 | 2024 |
| Hidden Valley Lane over Stream | Good | 22.0 ft | 128 | 2021 |
| Boy Scout RD over Mid. Fk Little Maquoketa | Good | 111.9 ft | 120 | 2006 |
| Flannagan RD over Creek | Good | 73.2 ft | 118 | 2016 |
| Stoffel RD over Stream | Good | 32.2 ft | 118 | 2018 |
| Airborne Road over S Fork Catfish Creek | Good | 148.0 ft | 110 | 2019 |
| Hickory Valley RD over Hewitt Creek | Good | 103.0 ft | 108 | 2022 |
| Pape RD over Hewitt Creek | Good | 112.9 ft | 97 | 2017 |
| Karper Harbor RD over Johns Creek | Good | 103.0 ft | 90 | 2021 |
| Arensdorf RD over Otter Creek | Good | 52.2 ft | 88 | 2019 |
| N Bankston RD over Unnamed Stream | Good | 52.2 ft | 88 | 2022 |
| Flannagan RD over N Fork Little Maquketa | Good | 83.0 ft | 88 | 2016 |
| Clear Creek RD over N Fork Little Maquket | Good | 132.9 ft | 88 | 2016 |
| Pilot Grove RD over White Water Creek | Good | 100.1 ft | 79 | 2013 |
| Mcallister RD over Stream | Good | 21.0 ft | 78 | 2021 |
| Local over White Water Creek | Good | 25.9 ft | 71 | 2006 |
| Local over White Water Creek | Good | 140.1 ft | 71 | 1999 |
| Chesterman RD over South Fork Catfish Creek | Good | 103.0 ft | 70 | 2021 |
| Wuchter RD over Creek | Good | 33.1 ft | 70 | 2013 |
| Worthington RD over Creek | Good | 83.0 ft | 69 | 2019 |
| Bobcat RD over US 20 & 52 | Good | 261.2 ft | 69 | 1988 |
| Local over Lytle Creek | Good | 103.0 ft | 60 | 1997 |
| Local over Creek | Good | 24.9 ft | 60 | 2006 |
| Hochrein RD over Drainage | Good | 24.9 ft | 60 | 2006 |
| Prairie Creek RD over Creek | Good | 25.9 ft | 59 | 2018 |
| Leuchs RD over Curram Branch | Good | 58.1 ft | 59 | 2016 |
| Local over Creek | Good | 20.0 ft | 59 | 1972 |
| Millville RD over Stream | Good | 32.2 ft | 59 | 2021 |
| Local over Hickory Creek | Good | 89.9 ft | 59 | 1984 |
| Hosch RD over Creek | Good | 73.2 ft | 59 | 2020 |
| Local over Creek | Good | 24.9 ft | 50 | 2006 |
| Sleepy Hollow RD over Creek | Good | 69.9 ft | 50 | 2016 |
| Sleepy Hollow RD over Bloody Run Creek | Good | 21.0 ft | 50 | 2016 |
| Vaske RD over N Fork Maquoketa River | Good | 143.0 ft | 49 | 2018 |
| Bockenstedt over Maquoketa River | Good | 132.9 ft | 49 | 2019 |
| Hartbecke RD over Curran-whitewater Creek | Good | 40.0 ft | 49 | 2012 |
| Chesterman RD over Unnamed Stream | Good | 23.0 ft | 45 | 2022 |
| Lovers Lane over Creek | Good | 32.2 ft | 45 | 2019 |
| Lovers Lane over Creek | Good | 67.9 ft | 45 | 2019 |
| Pitz RD over Buncombe Creek | Good | 30.5 ft | 44 | 2012 |
| Worthington RD over Creek | Good | 73.2 ft | 44 | 2019 |
| Bierman RD over Whitewater Creek | Good | 52.2 ft | 39 | 2019 |
| Mitchell Mill RD over Tete Des Morts River | Good | 46.6 ft | 34 | 2016 |
| Mitchell Mill RD over Small Stream | Good | 32.2 ft | 34 | 2017 |
| Pfeiler RD over Stream | Good | 21.0 ft | 34 | 2016 |
| Steger RD over Stream | Good | 92.8 ft | 33 | 2021 |
| Hannah RD over Creek | Good | 83.0 ft | 33 | 2017 |
| Buncombe RD over Buncombe Creek | Good | 103.0 ft | 30 | 2019 |
| Fischer RD over Prairie Creek | Good | 143.0 ft | 29 | 2018 |
| Local over Curren Branch | Good | 103.0 ft | 26 | 1986 |
| Plum Creek RD over N Fk Little Maquoketa | Good | 103.0 ft | 26 | 2016 |
| Rea RD over Creek | Good | 22.0 ft | 25 | 2017 |
| Local over Creek | Good | 27.9 ft | 25 | 1973 |
| Local over Buncomb Creek | Good | 102.0 ft | 20 | 1977 |
| Tara Lane over Stream | Good | 21.0 ft | 20 | 2021 |
| Dry Hollow RD over Creek | Good | 25.9 ft | 20 | 2013 |
| Urbain RD over Creek | Good | 25.9 ft | 15 | 2018 |
| Brehm Lane over Creek | Good | 21.0 ft | 11 | 2018 |
| Holy Family Lane over Creek | Good | 69.9 ft | 5 | 2020 |
| Steil Lane over Creek | Good | 67.9 ft | 5 | 2016 |
| Mines Of Spain over Catfish Creek | Good | 145.0 ft | 0 | 1993 |