Longest Bridges in Iowa
The longest bridge in Iowa is the US 20 over Miss. River HWY & Rr, at 1.1 miles (5,759 ft) of total structure length. The table below ranks the longest bridges in Iowa by structure length.
| Bridge | County | Length | Year Built | Daily Traffic |
|---|---|---|---|---|
| US 20 over Miss. River HWY & Rr | Dubuque | 5,759 ft (1.1 mi) | 1943 | 17,700 |
| Ia 14 over Des Moines River & Res | Marion | 5,652 ft (1.1 mi) | 1965 | 3,820 |
| Ia 415 over Saylorville Reservoir | Polk | 4,933 ft (0.9 mi) | 1973 | 10,100 |
| US 275 & Ia 92 over Missouri River And Rr | Pottawattamie | 4,296 ft (0.8 mi) | 2010 | 11,100 |
| I-280 over Mississippi River & Road | Scott | 4,192 ft (0.8 mi) | 1970 | 24,200 |
| US 30 over Mississippi Rvr Rr S 2nd | Clinton | 4,165 ft (0.8 mi) | 1956 | 11,100 |
| US 61 & 151 over Peosta Chl & City ST | Dubuque | 4,029 ft (0.8 mi) | 1991 | 22,300 |
| Ia 12 over Bnsf Rvr Sts & Ia 376 | Woodbury | 3,970 ft (0.8 mi) | 1936 | 20,600 |
| US 67 over Miss Rvr Rr & Ia 461 | Scott | 3,854 ft (0.7 mi) | 1940 | 26,500 |
| I 80 WB Flyover over I80 US 6 I29 & Bnsf Iir | Pottawattamie | 3,678 ft (0.7 mi) | 2017 | 2,630 |
| I-80 over Mississippi River & Rr | Scott | 3,487 ft (0.7 mi) | 1967 | 38,100 |
| I 74 EB over Mississippi River | Scott | 3,395 ft (0.6 mi) | 2021 | 28,250 |
| I 74 WB over Mississippi River | Scott | 3,386 ft (0.6 mi) | 2020 | 37,650 |
| I 80 WB US 6 WB over I29 Rr Langdon BLVD | Pottawattamie | 3,357 ft (0.6 mi) | 2017 | 19,100 |
| US 136 over Mississippi River Rr RD | Lee | 3,346 ft (0.6 mi) | 1985 | 10,500 |
| I 80 US 6 EB over I29 Rr Harrylangdon BLVD | Pottawattamie | 3,336 ft (0.6 mi) | 2019 | 17,050 |
| US 34 over Missouri River | Mills | 3,282 ft (0.6 mi) | 2014 | 7,100 |
| Ia 92 over Mississippi River & Rr | Muscatine | 3,018 ft (0.6 mi) | 1972 | 3,820 |
| Ia 136 over Mississippi River & Rr | Clinton | 3,012 ft (0.6 mi) | 1974 | 11,000 |
| US 61 & 151 over Mississippi River Island | Dubuque | 2,950 ft (0.6 mi) | 1982 | 20,400 |
| SB Ia 27 over Cedar River & Rr | Black Hawk | 2,861 ft (0.5 mi) | 1995 | 8,450 |
| NB Ia 27 over Cedar River & Ia North R | Black Hawk | 2,860 ft (0.5 mi) | 1995 | 7,550 |
| I80 EB To I380 NB over I 80/us 218/ia 27 | Johnson | 2,770 ft (0.5 mi) | 2020 | 2,800 |
| South Expressway over Viaduct(rr & Streets) | Pottawattamie | 2,648 ft (0.5 mi) | 1976 | 7,488 |
| South Expressway over Viaduct Over Rr & Street | Pottawattamie | 2,648 ft (0.5 mi) | 1976 | 7,629 |
| I 29 SB To I 80 EB over I 29 & Cbec Rr | Pottawattamie | 2,645 ft (0.5 mi) | 2019 | 3,380 |
| I 129 over Missouri River & I-29 | Woodbury | 2,606 ft (0.5 mi) | 1976 | 15,800 |
| US 18 over Mississippi River Ia 76 | Clayton | 2,561 ft (0.5 mi) | 1974 | 10,100 |
| I 80 WB over Missouri Rvr RD Rr | Pottawattamie | 2,482 ft (0.5 mi) | 2010 | 25,250 |
| I-80 EB over Missouri River RD & Rr | Pottawattamie | 2,467 ft (0.5 mi) | 1972 | 31,550 |
| US 52 & Ia 64 over Mississippi River | Jackson | 2,454 ft (0.5 mi) | 2017 | 2,150 |
| Ia 141 Fly Over over I 35/80 Ia 141 & Rr | Polk | 2,385 ft (0.5 mi) | 2019 | 15,100 |
| Ia 149 over Dm River Streets Bnsf Rr | Wapello | 2,318 ft (0.4 mi) | 1964 | 18,200 |
| I 380 SB over Ia 922 | Linn | 2,295 ft (0.4 mi) | 1979 | 28,800 |
| I 74 & US 6 WB over US 67 Dme Rr City Sts | Scott | 2,279 ft (0.4 mi) | 2019 | 28,250 |
| I 74 EB US 6 EB over US 67 Rr City Streets | Scott | 2,271 ft (0.4 mi) | 2021 | 28,250 |
| US 34 over Mississippi River | Des Moines | 2,270 ft (0.4 mi) | 1994 | 7,500 |
| I 29 SB over I-80 & I-29 Interchange | Pottawattamie | 2,173 ft (0.4 mi) | 2014 | 23,900 |
| I 380 NB over Ia 922 | Linn | 2,171 ft (0.4 mi) | 1979 | 26,000 |
| Ia 316 over Des Moines River | Polk | 2,139 ft (0.4 mi) | 1968 | 810 |
| I-480 Ramp H over I 29 2 AVE EB Bdwy Frt R | Pottawattamie | 2,100 ft (0.4 mi) | 2023 | 10,700 |
| Jefferson ST over Des Moines Rvr & Rr | Wapello | 2,080 ft (0.4 mi) | 1936 | 6,100 |
| I 80 EB To I 29 NB over I80 & I29 Interchange | Pottawattamie | 1,985 ft (0.4 mi) | 2014 | 5,500 |
| US 30 over Missouri River | Harrison | 1,982 ft (0.4 mi) | 1991 | 4,410 |
| Bunge AVE over Missouri River (toll) | Mills | 1,969 ft (0.4 mi) | 1952 | 2,174 |
| Ia 175 over Missouri River | Monona | 1,956 ft (0.4 mi) | 1950 | 1,790 |
| Ia 2 over Missouri River | Fremont | 1,895 ft (0.4 mi) | 1986 | 8,300 |
| Ia 100 over Cedar River & Ianr Rr | Linn | 1,885 ft (0.4 mi) | 2016 | 11,500 |
| NB I-380 over Cc Rr & Ash Pit | Linn | 1,763 ft (0.3 mi) | 1979 | 32,300 |
| SB I-380 over Cc Rr & Ash Pit | Linn | 1,763 ft (0.3 mi) | 1979 | 41,000 |
| WB I-680 over Missouri River & City ST | Pottawattamie | 1,710 ft (0.3 mi) | 1975 | 9,150 |
| I 35 Fly Over Ramp over I 35 & US 30 | Story | 1,699 ft (0.3 mi) | 2019 | 7,700 |
| I480 EB To I29 NB over I 29 US 6 AVE G | Pottawattamie | 1,687 ft (0.3 mi) | 2022 | 4,090 |
| I-480 & US 6 over Missouri River & Rr | Pottawattamie | 1,687 ft (0.3 mi) | 1966 | 53,700 |
| US 20 over Iowa River | Hardin | 1,639 ft (0.3 mi) | 2003 | 9,200 |
| Ia 9 over Mississippi River | Allamakee | 1,629 ft (0.3 mi) | 1931 | 2,200 |
| So Center ST over Rr And Madison ST | Marshall | 1,604 ft (0.3 mi) | 1951 | 9,491 |
| EB I-680 over Missouri River & City ST | Pottawattamie | 1,603 ft (0.3 mi) | 1952 | 9,150 |
| W Broadway over Up&cnic Rr&city Streets | Pottawattamie | 1,542 ft (0.3 mi) | 2011 | 12,055 |
| US 20 EB Ia 27 SB over Ianr Rr Tx ST Cedar Rvr | Black Hawk | 1,540 ft (0.3 mi) | 1983 | 10,200 |
| I 380 NB over Ianr Rr Tx ST Cedar Rvr | Black Hawk | 1,526 ft (0.3 mi) | 1983 | 19,950 |
| SW 8th ST over Rr Cherry Mlk Jr PKWY | Polk | 1,515 ft (0.3 mi) | 1967 | 6,875 |
| US 77 over Missouri River & RD | Woodbury | 1,501 ft (0.3 mi) | 1981 | 34,600 |
| I380 SB Flyover over US 20 & US 218 | Black Hawk | 1,498 ft (0.3 mi) | 1983 | 9,700 |
| NB I-380 over City Sts Ccp& Up Rr | Linn | 1,479 ft (0.3 mi) | 1979 | 31,850 |
| SB I-380 over City Streets Up &ccp Rr | Linn | 1,470 ft (0.3 mi) | 1979 | 34,350 |
| Ia 137 over Des Moines River | Wapello | 1,459 ft (0.3 mi) | 2006 | 5,800 |
| Ia 92 over Iowa River | Louisa | 1,449 ft (0.3 mi) | 1985 | 4,090 |
| NB US 61 & 151 over Ia 946 & City Sts& Ccp R | Dubuque | 1,435 ft (0.3 mi) | 1990 | 6,100 |
| US 6 EB over Frnt RD & 2nd AVE | Pottawattamie | 1,421 ft (0.3 mi) | 2022 | 12,600 |
| US 69 over Bn Rr Scott Ave& Mlk Pkw | Polk | 1,407 ft (0.3 mi) | 1937 | 33,600 |
| SB US 61 & 151 over Ia 946 & City Sts& Ccp R | Dubuque | 1,370 ft (0.3 mi) | 1990 | 6,150 |
| Us218nb To I80 WB over I 80 Ramps F & G | Johnson | 1,350 ft (0.3 mi) | 2023 | 2,340 |
| SW 9th ST over Cherry Rr Mlk PKWY | Polk | 1,333 ft (0.3 mi) | 1967 | 14,108 |
| US 218 SB over 4th 5th 6th & W Park | Black Hawk | 1,333 ft (0.3 mi) | 1991 | 11,050 |
| NB US 218 over 4th 5th 6th & W Park | Black Hawk | 1,316 ft (0.2 mi) | 1991 | 12,650 |
| US 61 & 136 over Des Moines Rvr Rr & RD | Lee | 1,302 ft (0.2 mi) | 1994 | 5,100 |
| G Avenue over Rrs N 10th And N 13th | Pottawattamie | 1,290 ft (0.2 mi) | 2006 | 7,534 |
| Ol Mormon Br RD over Pigeon CR And Up Rr | Pottawattamie | 1,280 ft (0.2 mi) | 2005 | 4,660 |
| M AVE over Iowa River | Iowa | 1,265 ft (0.2 mi) | 1950 | 2,340 |
| FM over Des Moines River | Wapello | 1,245 ft (0.2 mi) | 1957 | 880 |
| 2nd AVE S over Des Moines River | Webster | 1,208 ft (0.2 mi) | 1959 | 3,050 |
| X 99 Franklin ST over Iowa River | Louisa | 1,199 ft (0.2 mi) | 2020 | 880 |
| Westown Parkway over I-80/I-35 | Polk | 1,195 ft (0.2 mi) | 1997 | 12,526 |
| I80us6 WB To I29nb over II Rr & Drainage Ditch | Pottawattamie | 1,192 ft (0.2 mi) | 2017 | 1,450 |
| EB I-80 over Cedar River | Cedar | 1,188 ft (0.2 mi) | 2009 | 18,600 |
| I 80 WB over Cedar River | Cedar | 1,188 ft (0.2 mi) | 2010 | 18,250 |
| X 99 over Iowa River | Louisa | 1,159 ft (0.2 mi) | 2014 | 570 |
| F44 290th ST over Cedar River | Cedar | 1,145 ft (0.2 mi) | 1948 | 620 |
| WB US 30 over Cedar River | Linn | 1,141 ft (0.2 mi) | 1975 | 11,750 |
| US 30 EB over Cedar River | Linn | 1,140 ft (0.2 mi) | 2022 | 11,750 |
| FM over Dm River | Mahaska | 1,139 ft (0.2 mi) | 2010 | 620 |
| SW 9th ST over Raccoon River & Trail | Polk | 1,136 ft (0.2 mi) | 1967 | 12,809 |
| Ia 2 EB over Missouri River Overflow | Fremont | 1,103 ft (0.2 mi) | 2019 | 4,150 |
| Ia 2 WB over Missouri River Overflow | Fremont | 1,103 ft (0.2 mi) | 2020 | 4,150 |
| Ia 4 (n Elm St) over Up Rr & Mckinley ST | Greene | 1,100 ft (0.2 mi) | 2012 | 6,200 |
| Chillicothe RD over Des Moines River | Wapello | 1,080 ft (0.2 mi) | 2011 | 1,300 |
| US 6 over US 6 To I 80 EB | Pottawattamie | 1,077 ft (0.2 mi) | 2019 | 3,540 |
| Floyd BLVD over 3rd ST & Rr | Woodbury | 1,074 ft (0.2 mi) | 1986 | 9,400 |
| US 151 NB over Maquoketa River | Jones | 1,073 ft (0.2 mi) | 2003 | 4,400 |
| US 151 SB over Maquoketa River | Jones | 1,073 ft (0.2 mi) | 2003 | 4,500 |
| Ia 92 WB over Mosquito Creek & Rr | Pottawattamie | 1,064 ft (0.2 mi) | 2015 | 10,000 |
| Ia 92 EB over Mosquito Creek & II Rr | Pottawattamie | 1,063 ft (0.2 mi) | 2016 | 9,800 |
| I 29 NB over Mosquito Ck II Rr Path | Pottawattamie | 1,056 ft (0.2 mi) | 2016 | 12,100 |
| I 29 SB over Mosquito Ck II Rr Path | Pottawattamie | 1,056 ft (0.2 mi) | 2016 | 10,200 |
| FM over Cedar River | Muscatine | 1,054 ft (0.2 mi) | 1966 | 990 |
| WB I-235 over Ia 163/univ Ave/ramp | Polk | 1,045 ft (0.2 mi) | 2004 | 36,950 |
| 1st AVE S over 21st ST & Rr | Webster | 1,043 ft (0.2 mi) | 1968 | 9,860 |
| US 61 over Iowa River | Louisa | 1,040 ft (0.2 mi) | 1980 | 4,950 |
| FM over Cedar River | Benton | 1,038 ft (0.2 mi) | 1968 | 324 |
| Ia 1 over Cedar River | Linn | 1,036 ft (0.2 mi) | 1992 | 5,600 |
| Lewis Access RD over Cedar River | Linn | 1,036 ft (0.2 mi) | 1961 | 1,866 |
| US 6 over Cedar River | Muscatine | 1,036 ft (0.2 mi) | 1972 | 1,770 |
| FM over Cedar River | Benton | 1,034 ft (0.2 mi) | 1969 | 1,267 |
| Ia 210 over Des Moines River | Boone | 1,020 ft (0.2 mi) | 1973 | 2,040 |
| EB I-235 over University AVE | Polk | 1,019 ft (0.2 mi) | 2005 | 29,900 |
| 6th ST over Floyd Clark & Rr | Woodbury | 1,012 ft (0.2 mi) | 1965 | 8,520 |
| 200th Street over Floyd River | Plymouth | 1,000 ft (0.2 mi) | 2007 | 8,224 |
| US 30 EB over Up Rr 21st ST SW Creek | Linn | 996 ft (0.2 mi) | 1980 | 15,750 |
| US 30 WB over Up Rr 21st ST SW Creek | Linn | 996 ft (0.2 mi) | 1980 | 15,750 |
| Ia 17 over Des Moines River | Polk | 987 ft (0.2 mi) | 1959 | 5,600 |
| Ia 22 over Cedar River | Muscatine | 965 ft (0.2 mi) | 1987 | 3,650 |
| FM over Des Moines River | Van Buren | 960 ft (0.2 mi) | 1985 | 430 |
| I29 SB To I480 WB over Frontage WB Broadway | Pottawattamie | 959 ft (0.2 mi) | 2023 | 5,100 |
| FM over Des Moines River | Van Buren | 949 ft (0.2 mi) | 1977 | 240 |
| Fleur DR over Raccoon And Rr | Polk | 946 ft (0.2 mi) | 1936 | 2,825 |
| Uni AVE WB Entr over WB Exit Ramp Univ. Ave. | Polk | 937 ft (0.2 mi) | 2004 | 10,000 |
| W40 over Des Moines River | Van Buren | 937 ft (0.2 mi) | 1960 | 970 |
| I29 NB To I80 WB over I 29 NB | Pottawattamie | 920 ft (0.2 mi) | 2019 | 7,900 |
| Mlk Jr PKWY N over Racoon River Fleur Rr | Polk | 919 ft (0.2 mi) | 2004 | 8,666 |
| Mlk Jr PKWY S over Racoon River Fleur Rr | Polk | 919 ft (0.2 mi) | 2004 | 8,147 |
| NB US 65 over Des Moines River | Polk | 919 ft (0.2 mi) | 1997 | 12,450 |
| SB US 65 over Des Mones River | Polk | 919 ft (0.2 mi) | 1997 | 12,300 |
| North 3rd ST over Soldier Creek & Trail | Webster | 917 ft (0.2 mi) | 1961 | 5,768 |
| Outer Drive over Floyd River & Cnic Rr | Woodbury | 912 ft (0.2 mi) | 2009 | 14,264 |
| Ia 27 SB over Des Moines River | Lee | 907 ft (0.2 mi) | 2002 | 3,650 |
| Ia 27 NB over Des Moines River | Lee | 907 ft (0.2 mi) | 2002 | 3,600 |
| NW Beaver DR over I 35 I 80 Beaver Creek | Polk | 903 ft (0.2 mi) | 2016 | 8,366 |
| Local over Des Moines River | Mahaska | 902 ft (0.2 mi) | 1987 | 710 |
| Edgewood RD over Prairie Creek & Up Rr | Linn | 901 ft (0.2 mi) | 2009 | 10,700 |
| NE 22nd ST over I 80 & I 35 | Polk | 898 ft (0.2 mi) | 2017 | 5,079 |
| Ia 57 over Cedar River | Black Hawk | 897 ft (0.2 mi) | 1974 | 14,300 |
| NB US 218 over Black Hawk Ck & RD | Black Hawk | 896 ft (0.2 mi) | 1991 | 11,250 |
| SB US 218 over Black Hawk Ck & RD | Black Hawk | 896 ft (0.2 mi) | 1991 | 11,350 |
| I 380 SB over Ianr Rr Tx ST Cedar Rvr | Black Hawk | 887 ft (0.2 mi) | 1983 | 10,700 |
| I80 EB To Us218 SB over I80 WB To US 218 SB | Johnson | 876 ft (0.2 mi) | 2020 | 6,700 |
| FM Sutliff RD over Cedar River | Johnson | 872 ft (0.2 mi) | 1983 | 480 |
| Market ST over Des Moines River | Wapello | 867 ft (0.2 mi) | 1972 | 6,100 |
| I 235 over Des Moines Rvr Rbrtraydr | Polk | 863 ft (0.2 mi) | 1962 | 88,200 |
| Ia 14 over Up Rr Madison&market ST | Marshall | 861 ft (0.2 mi) | 1985 | 13,300 |
| I380 SB To I80 EB over I 80 Ramps E & G | Johnson | 861 ft (0.2 mi) | 2022 | 14,400 |
| US 61/151 SB over 4th 5th White ST | Dubuque | 860 ft (0.2 mi) | 1992 | 12,300 |
| US 75 NB over Ccp Rr & Bnsf Rr & Bus 7 | Woodbury | 856 ft (0.2 mi) | 1999 | 5,200 |
| S 3rd ST over Up Rr & ST | Marshall | 854 ft (0.2 mi) | 1984 | 9,000 |
| Univ AVE over Des Moines River | Polk | 849 ft (0.2 mi) | 1920 | 16,294 |
| NW 66th AVE over Des Moines River | Polk | 833 ft (0.2 mi) | 2016 | 11,354 |
| US 34 over E Nodaway River & Bnsf R | Adams | 831 ft (0.2 mi) | 1964 | 2,970 |
| SE 6th ST over Des Moines River | Polk | 830 ft (0.2 mi) | 1976 | 7,911 |
| US 218 over Cedar Rvr & Trail | Black Hawk | 828 ft (0.2 mi) | 1989 | 21,500 |
| FM over Cedar River | Cedar | 827 ft (0.2 mi) | 1966 | 1,860 |
| Ia5 W To I35 S over I-35 & Ia #5 Ramp C | Polk | 827 ft (0.2 mi) | 2000 | 1,540 |
| Cedar River PKWY over Cedar River | Bremer | 826 ft (0.2 mi) | 2019 | 144 |
| FM over Cedar River | Muscatine | 815 ft (0.2 mi) | 1997 | 550 |
| V64 over Des Moines River | Van Buren | 815 ft (0.2 mi) | 2016 | 1,100 |
| County Line RD over Ia 5 | Warren | 813 ft (0.2 mi) | 2000 | 1,055 |
| Ia 150 over Cedar River | Benton | 812 ft (0.2 mi) | 1980 | 3,840 |
| 12th AVE over Cedar River & RD | Linn | 799 ft (0.2 mi) | 1974 | 5,228 |
| SW 7th ST over Raccoon R & Trail | Polk | 798 ft (0.2 mi) | 1915 | 7,253 |
| Ia 2 over Des Moines River | Van Buren | 796 ft (0.2 mi) | 2012 | 1,440 |
| US 75 SB over Floyd River | Woodbury | 784 ft (0.1 mi) | 1999 | 5,650 |
| US 75 NB over Floyd River | Woodbury | 784 ft (0.1 mi) | 2000 | 5,650 |
| US 30 over Boyer Rvr & Cc Rr & Road | Harrison | 782 ft (0.1 mi) | 1973 | 5,900 |
| US 151 NB over N Fork Maquoketa River | Dubuque | 778 ft (0.1 mi) | 2002 | 4,550 |
| US 151 SB over N Fork Maquoketa River | Dubuque | 778 ft (0.1 mi) | 2002 | 4,550 |
| FM over Des Moines River | Wapello | 776 ft (0.1 mi) | 1985 | 80 |
| US 34 & 63 over Des Moines River | Wapello | 775 ft (0.1 mi) | 2013 | 14,300 |
| FM S-25 over I 35 | Franklin | 770 ft (0.1 mi) | 1973 | 559 |
| E Wahsburn RD over Cedar River | Black Hawk | 769 ft (0.1 mi) | 1958 | 1,571 |
| Ia 2 over W Nishnabotna River Ovfl | Fremont | 762 ft (0.1 mi) | 1953 | 2,050 |
| US 34 Ramp C over Bnsf Rr & City Streets | Des Moines | 759 ft (0.1 mi) | 1972 | 2,860 |
| 221st Street over Over Bnsf Rr | Mills | 759 ft (0.1 mi) | 2009 | 847 |
| US 69 over Des Moines River | Polk | 757 ft (0.1 mi) | 1936 | 31,100 |
| US 75 SB over Ccp Rr & Bnsf Rr & Ramp | Woodbury | 756 ft (0.1 mi) | 1999 | 5,200 |
| US 218 over Quarry Lake & Wyth RD | Black Hawk | 755 ft (0.1 mi) | 1989 | 29,000 |
| FM over Des Moines River | Van Buren | 752 ft (0.1 mi) | 1960 | 1,120 |
| Scott AVE over Des Moines River | Polk | 747 ft (0.1 mi) | 1937 | 4,166 |
| NB US 61/151 over 4th 5th White ST | Dubuque | 743 ft (0.1 mi) | 1992 | 13,200 |
| NE 54th AVE over I 35 | Polk | 742 ft (0.1 mi) | 2017 | 1,603 |
| Kenyon RD SB over Cn Rr And 7th Street | Webster | 742 ft (0.1 mi) | 1936 | 3,159 |
| Kenyon RD NB over Cn Rr And 7th ST | Webster | 742 ft (0.1 mi) | 1977 | 3,109 |
| US 20 EB US 71 SB over North Raccoon River | Sac | 735 ft (0.1 mi) | 2012 | 3,300 |
| US 20 WB US 71 NB over North Raccoon River | Sac | 735 ft (0.1 mi) | 2012 | 3,300 |
| Ia 1 over Skunk River & Access RD | Washington | 733 ft (0.1 mi) | 2015 | 2,340 |
| Ia 44 over North Raccoon River | Dallas | 729 ft (0.1 mi) | 1973 | 3,910 |
| US 30 WB over Des Moines River | Boone | 724 ft (0.1 mi) | 1963 | 4,350 |
| FM over Des Moines River | Boone | 724 ft (0.1 mi) | 1980 | 1,028 |
| 3rd ST over US 61 & 151 | Dubuque | 724 ft (0.1 mi) | 1991 | 2,428 |
| FM over Des Moines River | Boone | 723 ft (0.1 mi) | 1972 | 769 |
| Guthrie AVE over Over Up Rr | Polk | 721 ft (0.1 mi) | 1978 | 5,368 |
| Mlk EB over Des Moines River | Polk | 720 ft (0.1 mi) | 2010 | 4,276 |