Bridges in Iowa

23,716Total Bridges

9,329Good

9,964Fair

4,423Poor

Bridge Conditions in Iowa

Iowa has 23,716 bridges tracked in the National Bridge Inventory. Of these, 4,423 (18%) are rated as poor condition — meaning at least one major component has significant deterioration. The average bridge in Iowa is 46 years old.

Iowa Bridge Facts

Total Bridges	23,716
Good Condition	9,329
Fair Condition	9,964
Poor Condition	4,423
Average Bridge Age	46 years
Longest Bridge	5759.8 ft

Longest Bridges in Iowa

US 20 over Miss. River HWY & Rr5759.8 ftFair Ia 14 over Des Moines River & Res5652.9 ftFair Ia 415 over Saylorville Reservoir4933.1 ftFair US 275 & Ia 92 over Missouri River And Rr4296.9 ftGood I-280 over Mississippi River & Road4192.9 ftFair

Counties in Iowa

Adair303 bridges37 poor Adams185 bridges85 poor Allamakee197 bridges21 poor Appanoose185 bridges54 poor Audubon204 bridges37 poor Benton373 bridges81 poor Black Hawk489 bridges25 poor Boone134 bridges38 poor Bremer267 bridges32 poor Buchanan320 bridges20 poor Buena Vista157 bridges54 poor Butler287 bridges35 poor Calhoun198 bridges49 poor Carroll249 bridges17 poor Cass296 bridges104 poor Cedar300 bridges60 poor Cerro Gordo268 bridges14 poor Cherokee244 bridges68 poor Chickasaw304 bridges80 poor Clarke168 bridges54 poor Clay154 bridges16 poor Clayton257 bridges38 poor Clinton375 bridges12 poor Crawford301 bridges23 poor Dallas206 bridges18 poor Davis163 bridges39 poor Decatur199 bridges78 poor Delaware294 bridges20 poor Des Moines173 bridges28 poor Dickinson83 bridges13 poor Dubuque346 bridges25 poor Emmet78 bridges15 poor Fayette362 bridges97 poor Floyd214 bridges30 poor Franklin227 bridges28 poor Fremont179 bridges38 poor Greene168 bridges25 poor Grundy288 bridges77 poor Guthrie263 bridges94 poor Hamilton165 bridges32 poor Hancock135 bridges27 poor Hardin241 bridges69 poor Harrison222 bridges41 poor Henry173 bridges36 poor Howard212 bridges41 poor Humboldt87 bridges7 poor Ida182 bridges30 poor Iowa239 bridges45 poor Jackson252 bridges36 poor Jasper382 bridges108 poor Jefferson156 bridges31 poor Johnson376 bridges34 poor Jones230 bridges11 poor Keokuk183 bridges37 poor Kossuth266 bridges40 poor Lee214 bridges30 poor Linn511 bridges34 poor Louisa151 bridges22 poor Lucas198 bridges65 poor Lyon273 bridges70 poor Madison225 bridges82 poor Mahaska221 bridges67 poor Marion217 bridges28 poor Marshall303 bridges130 poor Mills184 bridges35 poor Mitchell167 bridges16 poor Monona160 bridges41 poor Monroe131 bridges29 poor Montgomery209 bridges52 poor Muscatine144 bridges30 poor O'Brien263 bridges16 poor Osceola184 bridges12 poor Page191 bridges56 poor Palo Alto135 bridges21 poor Plymouth430 bridges90 poor Pocahontas198 bridges50 poor Polk548 bridges34 poor Pottawattamie557 bridges50 poor Poweshiek243 bridges95 poor Ringgold215 bridges88 poor Sac221 bridges65 poor Scott291 bridges29 poor Shelby207 bridges18 poor Sioux448 bridges14 poor Story302 bridges40 poor Tama337 bridges107 poor Taylor220 bridges81 poor Union172 bridges55 poor Van Buren155 bridges49 poor Wapello190 bridges25 poor Warren238 bridges48 poor Washington207 bridges33 poor Wayne165 bridges31 poor Webster190 bridges48 poor Winnebago54 bridges16 poor Winneshiek342 bridges57 poor Woodbury455 bridges95 poor Worth116 bridges17 poor Wright175 bridges48 poor

Poor Condition Bridges in Iowa

Bridge	County	Length	Traffic	Year
US 67 over Miss Rvr Rr & Ia 461	Scott	3854.0 ft	26,500	1940
Ia 12 over Bnsf Rvr Sts & Ia 376	Woodbury	3970.1 ft	20,600	1936
WB I-80 over Sugar Creek	Jasper	101.0 ft	18,050	1960
Fleur DR over Old Up Rr & SW 22nd	Polk	241.1 ft	15,634	1936
Eastern AVE over Duck Creek	Scott	97.1 ft	15,300	1900
SW 9th ST over Cherry Rr Mlk PKWY	Polk	1334.0 ft	14,108	1967
Gilbert ST over Ralston Creek	Johnson	83.0 ft	14,025	1972
US 75 over Stream	Plymouth	34.1 ft	14,000	1926
I 80 WB over Iowa 21	Poweshiek	137.1 ft	13,300	1963
SW 9th ST over Raccoon River & Trail	Polk	1136.2 ft	12,809	1967
AVE L over Dry Creek	Lee	69.9 ft	10,953	1915
Ia 1 NB over Iowa River	Johnson	341.9 ft	10,950	1915
8th AVE over Indian Creek	Linn	227.0 ft	10,789	1988
So Center ST over Linn Creek	Marshall	105.0 ft	10,448	1951
Edgewood RD NE over Cedar River & Rr	Linn	664.0 ft	10,268	1969
Eastern AVE over Goose Creek	Scott	81.0 ft	10,200	1978
Center Point RD over Over Cc Rr	Linn	212.9 ft	9,703	1968
So Center ST over Rr And Madison ST	Marshall	1604.0 ft	9,491	1951
8th AVE over Cedar River	Linn	658.1 ft	9,382	1938
6th ST over Floyd River	Woodbury	300.9 ft	8,957	1962
5th AVE over Drainage Ditch	Webster	73.2 ft	8,894	1955
N 15th ST over Soldier Creek	Webster	294.9 ft	8,798	1974
E Ridgeway AVE over Dry Run Creek	Black Hawk	22.0 ft	8,392	1950
Lincoln Way over Ioway Creek	Story	208.0 ft	8,224	1957
SE 6th ST over Des Moines River	Polk	830.1 ft	7,911	1976
South Expressway over Viaduct(rr & Streets)	Pottawattamie	2649.0 ft	7,488	1976
Gilbert ST over Shermans Creek	Floyd	40.0 ft	6,893	1914
SW 8th ST over Rr Cherry Mlk Jr PKWY	Polk	1515.1 ft	6,875	1967
E Hawkeye AVE over Des Moines River	Webster	436.0 ft	6,875	1987
S. 18th AVE over Over Up Rr	Marshall	278.9 ft	6,813	1980
Eastern AVE over Goose Creek	Scott	81.0 ft	6,376	1978
W Marion ST over Maquoketa River	Delaware	211.9 ft	6,294	1980
So Main ST RD over S Dry Run	Black Hawk	42.0 ft	6,093	1968
4th St. over Over Rr	Woodbury	254.9 ft	6,031	1984
North 3rd ST over Soldier Creek & Trail	Webster	918.0 ft	5,768	1961
Covington RD over Silver Creek	Linn	211.9 ft	5,696	1955
N 7th ST over Soldier Creek	Webster	174.9 ft	5,546	1995
Iowa AVE over Iowa River	Johnson	315.0 ft	5,400	1916
Covington RD over Lone Tree Creek	Linn	64.0 ft	5,200	1925
Main ST over Cedar River	Floyd	248.0 ft	4,971	1909
C St. over Prairie Creek	Linn	216.9 ft	4,910	1964
SE 5th ST over Yeader Creek	Polk	116.1 ft	4,717	1976
Kirkwood AVE over Ralston Creek	Johnson	62.0 ft	4,693	1935
Dodge ST over Over Iais Rr	Johnson	193.9 ft	4,688	1970
US 169 over Bass Creek	Webster	111.9 ft	4,680	1958
Dace AVE over Floyd River	Woodbury	349.1 ft	4,432	1962
Ia 9 over W Fork Little Sioux Rvr	Dickinson	66.9 ft	4,310	1929
18th ST over Duck Creek	Scott	125.0 ft	4,210	1962
J ST over Prairie Creek	Linn	226.0 ft	4,121	1964
Ia 175 over I-29	Monona	248.0 ft	4,090	1959
9th AVE over Indian Creek	Pottawattamie	44.9 ft	4,059	1930
S Clark ST over Blackhawk Creek	Scott	46.9 ft	4,004	1950
Williams ST over Four Mile Creek	Polk	246.1 ft	3,908	1978
Walnut ST over Des Moines River	Polk	503.0 ft	3,844	1911
Ia 141 & 175 over Maple River	Monona	305.1 ft	3,720	1967
Main Street South over Small Creek	Des Moines	38.1 ft	3,705	1886
Local over Up Rr & Lynn Ck	Marshall	710.0 ft	3,584	1971
W Bluff ST over Railroad Creek	Cherokee	36.1 ft	3,529	1961
11th ST over Floyd River	Woodbury	305.1 ft	3,523	1962
E AVE Northwest over Cedar River	Linn	685.0 ft	3,461	1979
Ia 14 over Black Hawk Creek	Grundy	179.1 ft	3,230	1931
16th AVE EB over Over Up Rr & Street	Linn	660.1 ft	3,200	1937
4th ST over Hinkle Creek	Benton	103.0 ft	3,197	1973
FM over Wapsi Creek	Muscatine	103.0 ft	3,080	1971
5th AVE over Indian Creek	Pottawattamie	44.0 ft	3,013	1935
Ia 2 over Big Sugar Creek	Lee	291.0 ft	2,980	1979
Ia 141 over I-29	Woodbury	210.0 ft	2,980	1959
Fm-magnolia RD over Mosquito Creek	Pottawattamie	151.9 ft	2,949	1965
235th Street over Big Creek	Henry	418.0 ft	2,930	1957
Grant ST South over Mud Creek	Polk	22.0 ft	2,902	1927
Local over Odebolt Creek	Ida	152.9 ft	2,884	1967
FM over Rock Creek	Marshall	102.0 ft	2,838	1965
FM over Iowa River	Marshall	534.1 ft	2,838	1955
Fleur DR over Raccoon And Rr	Polk	946.9 ft	2,825	1936
FM over Bear Creek	Benton	127.0 ft	2,740	1969
W Charles ST over Dry Run Creek	Fayette	44.0 ft	2,673	1905
Racine AVE over Drainage Ditch	Buchanan	24.9 ft	2,671	1953
Racine AVE over Small Natural Stream	Buchanan	91.9 ft	2,671	1954
Local RD over Drainage Ditch	Chickasaw	24.0 ft	2,642	1953
FM over English Creek	Marion	205.1 ft	2,640	1975
FM over Johnson Creek	Dallas	35.1 ft	2,628	1933
FM over Sugar Creek	Dallas	25.9 ft	2,628	1933
FM over Bnsf Rr And Stream	Marion	246.1 ft	2,620	1964
N Centerpoint over East Blue Creek	Linn	91.9 ft	2,583	1930
FM 340th ST over Little Sioux River	Clay	203.1 ft	2,573	1963
Washington ST over Ralston Creek	Johnson	34.1 ft	2,487	1910
US 69 over Galls Creek	Hancock	34.1 ft	2,450	1930
Local RD over Drainage Ditch	Chickasaw	82.0 ft	2,396	1954
FM over Soldier CR (dd No 247)	Webster	103.0 ft	2,364	1974
Johnson ST over Ralston Creek	Johnson	32.2 ft	2,356	1930
HWY 927 over Elkhorn Creek	Muscatine	62.0 ft	2,340	1929
Old Ia 102 over Buckley Creek	Mahaska	102.0 ft	2,340	1967
M AVE over Iowa River	Iowa	1265.1 ft	2,340	1950
Larsen Park RD over Perry Creek	Woodbury	56.1 ft	2,330	1963
Co RD Y-68 over Wapsi River Overflow	Scott	274.9 ft	2,310	1922
FM over Dd No 247	Webster	78.1 ft	2,284	1974
Ia 9 over Mississippi River	Allamakee	1629.9 ft	2,200	1931
F AVE Northwest over Cedar River	Linn	685.0 ft	2,193	1979
FM 1870 330th over Winnebago River	Hancock	128.0 ft	2,192	1963
Evans ST over Ralston Creek	Johnson	21.0 ft	2,176	1911