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.

Drawn to scale

The 10 longest crossings in Iowa, one scale

2,000 FT

1US 20 over Miss. River HWY & RrIA · 1.1 mi 2Ia 14 over Des Moines River & ResIA · 1.1 mi 3Ia 415 over Saylorville ReservoirIA · 4,933 ft 4US 275 & Ia 92 over Missouri River And RrIA · 4,297 ft 5I-280 over Mississippi River & RoadIA · 4,193 ft 6US 30 over Mississippi Rvr Rr S 2ndIA · 4,165 ft 7US 61 & 151 over Peosta Chl & City STIA · 4,030 ft 8Ia 12 over Bnsf Rvr Sts & Ia 376IA · 3,970 ft 9US 67 over Miss Rvr Rr & Ia 461IA · 3,854 ft 10I 80 WB Flyover over I80 US 6 I29 & Bnsf IirIA · 3,678 ft For scale: the Golden Gate Bridge1.7 mi

Every bar is drawn to the same scale, colored by the bridge's overall condition (green good, orange fair, red poor). Tick marks are piers where they are far enough apart to see. Twin structures carrying the two directions of one road are shown once, marked ×2.

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