| Ia 12 over Bnsf Rvr Sts & Ia 376 | Poor | 3970.1 ft | 20,600 | 1936 |
| 6th ST over Floyd River | Poor | 300.9 ft | 8,957 | 1962 |
| 4th St. over Over Rr | Poor | 254.9 ft | 6,031 | 1984 |
| Dace AVE over Floyd River | Poor | 349.1 ft | 4,432 | 1962 |
| 11th ST over Floyd River | Poor | 305.1 ft | 3,523 | 1962 |
| Ia 141 over I-29 | Poor | 210.0 ft | 2,980 | 1959 |
| Larsen Park RD over Perry Creek | Poor | 56.1 ft | 2,330 | 1963 |
| Correctionville over Bacon Creek | Poor | 21.0 ft | 1,664 | 1900 |
| D-25 over Small Natural Stream | Poor | 153.9 ft | 1,207 | 1959 |
| D-25 over Elliot Creek | Poor | 153.9 ft | 977 | 1957 |
| D 25 over Small Stream | Poor | 24.9 ft | 977 | 1978 |
| D-25 over Camp Creek | Poor | 128.0 ft | 977 | 1978 |
| FM over Elliott Creek | Poor | 21.0 ft | 797 | 1958 |
| FM over Mud Creek | Poor | 128.0 ft | 709 | 1969 |
| FM over Muddy Creek | Poor | 25.9 ft | 628 | 1967 |
| FM over Whiskey Creek | Poor | 103.0 ft | 628 | 1967 |
| FM over West Fork Little Sioux | Poor | 213.9 ft | 549 | 1955 |
| FM over Creek | Poor | 24.0 ft | 549 | 1955 |
| FM over West Fork Little Sioux | Poor | 244.1 ft | 549 | 1955 |
| FM over West Fork Little Sioux | Poor | 179.1 ft | 509 | 1960 |
| FM over West Fork Little Sioux | Poor | 204.1 ft | 469 | 1963 |
| FM over West Fork Little Sioux | Poor | 213.9 ft | 429 | 1955 |
| FM over Bacon Creek | Poor | 152.9 ft | 390 | 1968 |
| Main ST L43 over Bacon Creek | Poor | 115.2 ft | 383 | 1958 |
| FM over Creek | Poor | 21.0 ft | 379 | 1962 |
| FM over Drainage Ditch | Poor | 130.9 ft | 369 | 1960 |
| FM over Big Creek | Poor | 128.0 ft | 369 | 1962 |
| FM over Bacon Creek | Poor | 152.9 ft | 359 | 1967 |
| FM over Creek | Poor | 26.9 ft | 350 | 1961 |
| FM over Wolf Creek | Poor | 144.0 ft | 330 | 1958 |
| D54 Danbury over Creek | Poor | 26.9 ft | 319 | 1959 |
| FM over West Fork Little Sioux | Poor | 180.1 ft | 309 | 1969 |
| FM over Big Creek | Poor | 142.1 ft | 270 | 1964 |
| FM over Stream | Poor | 63.0 ft | 270 | 1981 |
| FM over Drainage Ditch | Poor | 130.9 ft | 230 | 1960 |
| FM over Creek | Poor | 26.9 ft | 219 | 1962 |
| FM over Rock Creek | Poor | 20.0 ft | 199 | 1900 |
| FM over Creek | Poor | 21.0 ft | 190 | 1963 |
| Rustin ST over Bacon Creek | Poor | 36.1 ft | 188 | 1900 |
| FM over Wolf Creek | Poor | 128.9 ft | 80 | 1968 |
| Local over Stream | Poor | 43.0 ft | 80 | 1950 |
| Local over Stream | Poor | 26.9 ft | 80 | 1915 |
| FM over Garretson Ditch | Poor | 169.0 ft | 71 | 1955 |
| Local over Stream | Poor | 28.9 ft | 60 | 1920 |
| Local over Creek | Poor | 38.1 ft | 60 | 1950 |
| Local over Muddy Creek | Poor | 37.1 ft | 60 | 1970 |
| Local over Stream | Poor | 32.2 ft | 60 | 1980 |
| Millers Path over Stream | Poor | 39.0 ft | 50 | 1947 |
| FM over Creek | Poor | 34.1 ft | 50 | 1978 |
| Local over Stream | Poor | 65.9 ft | 50 | 1950 |
| West ST over Drainage | Poor | 120.1 ft | 48 | 1930 |
| Local over Stream | Poor | 128.9 ft | 45 | 1952 |
| Emmett AVE over Deer Creek | Poor | 35.1 ft | 45 | 1977 |
| FM over Wolf Creek | Poor | 131.9 ft | 40 | 1956 |
| Local over Br Elliott Creek | Poor | 34.1 ft | 40 | 1980 |
| Local over Mcelhaney Creek | Poor | 65.0 ft | 40 | 1960 |
| Local over W Fk Little Sioux River | Poor | 204.1 ft | 30 | 1952 |
| Local over Farmers Ditch | Poor | 110.9 ft | 30 | 1900 |
| Local over Wolf Creek | Poor | 70.9 ft | 30 | 1940 |
| Local over Big Whiskey Creek | Poor | 82.0 ft | 30 | 1953 |
| Local over Creek | Poor | 77.1 ft | 26 | 1947 |
| Local over Wolf Creek | Poor | 63.0 ft | 26 | 1949 |
| Local over Stream | Poor | 48.9 ft | 26 | 1981 |
| Local over Parnell Creek | Poor | 30.8 ft | 20 | 1935 |
| Local over Wolf Creek | Poor | 150.9 ft | 20 | 1950 |
| Local over Garretson Drainage Ditch | Poor | 103.0 ft | 20 | 1970 |
| Local over Wolf Creek | Poor | 64.0 ft | 20 | 1981 |
| Local over Stream | Poor | 34.1 ft | 20 | 1970 |
| Local over Wright Creek | Poor | 107.0 ft | 20 | 1900 |
| Local over Mcelhaney Creek | Poor | 78.1 ft | 20 | 1981 |
| Local over Stream | Poor | 39.0 ft | 15 | 1950 |
| Local over Stream | Poor | 54.1 ft | 15 | 1940 |
| Local over Stream | Poor | 35.1 ft | 15 | 1938 |
| Local over Stream | Poor | 30.8 ft | 15 | 1979 |
| Local over Stream | Poor | 56.1 ft | 15 | 1950 |
| Local over Stream | Poor | 54.1 ft | 15 | 1979 |
| Local over Creek | Poor | 107.0 ft | 15 | 1955 |
| Local over Stream | Poor | 34.1 ft | 15 | 1940 |
| Local over Wolf Creek | Poor | 42.0 ft | 15 | 1960 |
| Local over Farmers Ditch | Poor | 147.0 ft | 11 | 1980 |
| Local over Small Stream | Poor | 39.0 ft | 11 | 1985 |
| Local over Wolf Creek | Poor | 39.0 ft | 11 | 1938 |
| Local over W Fk Little Sioux River | Poor | 111.9 ft | 11 | 1935 |
| Local over Wright Creek | Poor | 43.0 ft | 11 | 1950 |
| Local over Wright Creek | Poor | 111.9 ft | 11 | 1950 |
| Local over Stream | Poor | 111.9 ft | 11 | 1965 |
| Local over Stream | Poor | 48.9 ft | 11 | 1997 |
| Local over Stream | Poor | 68.9 ft | 11 | 1955 |
| Local over Stream | Poor | 57.1 ft | 5 | 1942 |
| Pocahontas AVE over Stream | Poor | 26.9 ft | 5 | 1935 |
| 252nd ST over Stream | Poor | 71.9 ft | 5 | 1985 |
| Local over Miller Creek | Poor | 103.0 ft | 5 | 1951 |
| Local over Stream | Poor | 42.0 ft | 5 | 1950 |
| Local over Stream | Poor | 53.1 ft | 5 | 1950 |
| Mason AVE over Stream | Poor | 35.1 ft | 5 | 1970 |
| US 77 over Missouri River & RD | Fair | 1502.0 ft | 34,600 | 1981 |
| I 29 Ia 12 over Drainage-all Of Roadway | Fair | 52.2 ft | 32,900 | 1957 |
| I 29 SB over Pierce ST Frontage RD | Fair | 191.9 ft | 21,100 | 2018 |
| I 29 SB over Bacon Creek | Fair | 591.5 ft | 18,900 | 2014 |
| I 29 NB over Bacon Creek | Fair | 591.5 ft | 18,900 | 2016 |
| Hamilton BLVD over Perry Creek | Fair | 130.9 ft | 18,291 | 1971 |
| NB I-29 over Big Sioux River | Fair | 560.0 ft | 17,650 | 1963 |
| I 29 NB over Floyd River | Fair | 653.2 ft | 17,200 | 2016 |
| I 29 Ia 12 NB over Pierce ST Frontage RD | Fair | 191.9 ft | 16,700 | 2017 |
| I 29 SB over Perry Creek Conduit | Fair | 88.6 ft | 16,450 | 2019 |
| I 129 over Missouri River & I-29 | Fair | 2607.0 ft | 15,800 | 1976 |
| I 29 Ia 12 SB over Hamilton BLVD | Fair | 211.9 ft | 15,700 | 2019 |
| I 29 NB Ia 12 NB over Hamilton BLVD | Fair | 211.9 ft | 15,700 | 2016 |
| I 29 SB over Floyd River | Fair | 655.2 ft | 15,400 | 2015 |
| I 29 NB over Floyd BLVD | Fair | 227.0 ft | 15,400 | 2018 |
| Hamiltn At 35th over Perry Creek | Fair | 188.0 ft | 14,345 | 1970 |
| I 29 NB over 8th ST | Fair | 167.0 ft | 14,300 | 2014 |
| I 29 SB over 8th ST | Fair | 167.0 ft | 14,300 | 2015 |
| I 29 NB over Up Rr | Fair | 183.4 ft | 14,300 | 2014 |
| I 29 SB over Up Rr | Fair | 183.4 ft | 14,300 | 2015 |
| EB US 20 over Sergeant Road | Fair | 161.1 ft | 14,000 | 1978 |
| WB US 20 over Sergeant Road | Fair | 161.1 ft | 14,000 | 1978 |
| EB US 20 over Proposed Rd. | Fair | 138.1 ft | 13,850 | 1978 |
| WB US 20 over Proposed Rd. | Fair | 138.1 ft | 13,850 | 1978 |
| Wesley PKWY over Tri-view & Bnsf Rr | Fair | 205.1 ft | 13,300 | 2012 |
| EB US 20 over Abandon Rr | Fair | 189.0 ft | 12,750 | 1978 |
| WB US 20 over Over Abandon Rr | Fair | 190.0 ft | 12,750 | 1978 |
| US 20 Ramps Ag over Ramp Over Ia 376 & Up Rr | Fair | 523.0 ft | 12,500 | 1976 |
| EB US 20 over Sunnybrook DR | Fair | 159.1 ft | 11,600 | 1978 |
| WB US 20 over Sunnybrook DR | Fair | 159.1 ft | 11,600 | 1978 |
| Hamilton BLVD over Perry Creek | Fair | 152.9 ft | 10,721 | 1959 |
| US 20 over Ia 376 & Up Rr | Fair | 353.0 ft | 10,000 | 1976 |
| Lakeport ST over US 20 | Fair | 270.0 ft | 9,850 | 1978 |
| Floyd BLVD over 3rd ST & Rr | Fair | 1074.1 ft | 9,400 | 1986 |
| Ia 376 over Floyd River | Fair | 522.0 ft | 9,200 | 1957 |
| War Eagle Drive over B.n. Rr | Fair | 288.1 ft | 8,703 | 1995 |
| 6th ST over Floyd Clark & Rr | Fair | 1012.1 ft | 8,520 | 1965 |
| 4th ST over Floyd River | Fair | 336.0 ft | 8,014 | 1962 |
| Military RD over Big Sioux River | Fair | 413.1 ft | 7,542 | 1976 |
| US 20 Ramps Df over Ramp Over Ia 376 & Up Rr | Fair | 344.2 ft | 6,800 | 1976 |
| EB US 20 over Little Whiskey Creek | Fair | 122.0 ft | 6,500 | 1959 |
| WB US 20 over Little Whiskey Creek | Fair | 122.0 ft | 6,500 | 1953 |
| Morningside AVE over US 20 | Fair | 279.9 ft | 6,217 | 1978 |
| I 29 SB Ramp over Perry Creek Conduit | Fair | 93.2 ft | 6,200 | 2019 |
| Stone Pk BLVD over Perry Creek | Fair | 90.9 ft | 6,129 | 1978 |
| So Hills DR over US 20 & US 75 | Fair | 319.9 ft | 6,120 | 1975 |
| US 20 Ramp G over Ramp G Over I-29 | Fair | 336.9 ft | 6,100 | 1976 |
| SB Ia 12 over US 20 | Fair | 289.0 ft | 6,100 | 1978 |
| NB Ia 12 over US 20 & US 75 | Fair | 289.0 ft | 6,100 | 1978 |
| US 75 SB over Floyd River | Fair | 784.1 ft | 5,650 | 1999 |
| US 75 NB over Floyd River | Fair | 784.1 ft | 5,650 | 2000 |
| WB US 20 over Big Whiskey Creek | Fair | 206.0 ft | 5,600 | 2010 |
| SB I29 To EB 20 over I 29 | Fair | 568.9 ft | 5,500 | 1976 |
| US 20 EB over Elliot Creek | Fair | 183.1 ft | 5,200 | 2015 |
| US 75 SB over Ccp Rr & Bnsf Rr & Ramp | Fair | 756.9 ft | 5,200 | 1999 |
| US 75 NB over Ccp Rr & Bnsf Rr & Bus 7 | Fair | 857.0 ft | 5,200 | 1999 |
| Ogden Ave/1st over I-29 | Fair | 213.9 ft | 4,878 | 2003 |
| Whispering Cree over Morningside Creek | Fair | 29.9 ft | 3,918 | 1984 |
| NB Ia 376 over Dry Creek | Fair | 23.0 ft | 3,750 | 1931 |
| SB Ia 376 over Dry Creek | Fair | 27.9 ft | 3,750 | 1956 |
| Steuben ST over 14th ST Drainage Ditch | Fair | 43.0 ft | 3,347 | 1965 |
| US 20 EB over Little Sioux River | Fair | 492.8 ft | 3,250 | 2017 |
| US 20 WB over Little Sioux River | Fair | 492.8 ft | 3,250 | 2016 |
| Martha ST over Bacon Creek | Fair | 79.1 ft | 3,223 | 1994 |
| Ramp Ia 12 over Rp Ia 12 To Ia 376 & Bns | Fair | 306.1 ft | 3,220 | 1967 |
| Ia 376 NB over Bnsf Up Rr-taft ST | Fair | 572.5 ft | 3,100 | 2017 |
| SB Ia 376 over Up Bnsf Rr-taft ST | Fair | 541.0 ft | 3,100 | 1974 |
| D-25 over Abandoned Rr | Fair | 284.1 ft | 2,633 | 1978 |
| 18th ST over Floyd River | Fair | 363.8 ft | 2,144 | 1962 |
| Ia 141 over Fork Little Sioux River | Fair | 44.0 ft | 1,960 | 1952 |
| Ia 140 over Mc Elhaney Creek | Fair | 150.9 ft | 1,930 | 1983 |
| Ia 141 over Smokey Hollow Creek | Fair | 82.0 ft | 1,810 | 1959 |
| Correctionville RD over US 75 | Fair | 303.1 ft | 1,735 | 1998 |
| 46th ST over Floyd River | Fair | 387.1 ft | 1,723 | 1964 |
| D51 (260th St) over I 29 | Fair | 358.6 ft | 1,699 | 2014 |
| D-25 over Small Natural Stream | Fair | 35.1 ft | 1,693 | 1958 |
| Country Club over Perry Creek | Fair | 137.1 ft | 1,675 | 1950 |
| 28th ST over Floyd River | Fair | 332.0 ft | 1,656 | 1962 |
| Ia 141 over W Branch Little Sioux | Fair | 214.9 ft | 1,470 | 1959 |
| Ia 141 over Wolfe Creek Ditch | Fair | 216.9 ft | 1,470 | 1959 |
| FM K-25(n) over I-29 | Fair | 210.0 ft | 1,416 | 1959 |
| Geneva ST over Perry Creek | Fair | 227.0 ft | 1,319 | 1993 |
| Ia 175 over Reynolds Creek | Fair | 122.0 ft | 1,230 | 1952 |
| Ia 175 over Stream | Fair | 40.0 ft | 1,230 | 1951 |
| US 20 Ramp over Aband Rr | Fair | 179.1 ft | 1,200 | 1978 |
| Ia 31 over Little Sioux River | Fair | 424.9 ft | 1,120 | 1973 |
| Ia 31 over Stream | Fair | 102.0 ft | 1,070 | 1956 |
| Ia 31 over Stream | Fair | 82.0 ft | 1,070 | 1956 |
| Ia 31 over Dry Creek | Fair | 73.2 ft | 850 | 1988 |
| FM over Mcelhaney Creek | Fair | 25.9 ft | 748 | 1973 |
| D12 110th ST over Pierson Creek | Fair | 90.9 ft | 738 | 1993 |
| FM over Elliott Creek | Fair | 28.9 ft | 709 | 1969 |
| FM over Little Sioux River | Fair | 351.0 ft | 679 | 1992 |
| D12 110th ST over Mcelhaney Creek | Fair | 104.0 ft | 509 | 1993 |
| FM over Maple River | Fair | 324.1 ft | 429 | 1985 |
| FM over Creek | Fair | 28.9 ft | 399 | 1965 |
| FM over E.br.wolf Creek | Fair | 36.1 ft | 399 | 1992 |
| FM over Wright Creek | Fair | 128.0 ft | 379 | 1968 |
| FM over Wolf Creek | Fair | 103.0 ft | 359 | 1967 |
| FM over Small Creek | Fair | 38.1 ft | 350 | 1978 |
| FM over Small Creek | Fair | 21.0 ft | 339 | 1962 |
| FM over Stream | Fair | 29.5 ft | 330 | 1950 |
| FM over Little Sioux River | Fair | 282.2 ft | 319 | 1966 |
| FM over Drainage Ditch | Fair | 205.1 ft | 279 | 1974 |
| FM over Creek | Fair | 152.9 ft | 250 | 1970 |
| Local over Small Creek | Fair | 75.1 ft | 240 | 1978 |
| FM over Pierson Creek | Fair | 38.1 ft | 211 | 1976 |
| FM over Bacon Creek | Fair | 153.9 ft | 180 | 1967 |
| Local over Big Whiskey Creek | Fair | 116.1 ft | 110 | 1982 |
| FM over Maple River | Fair | 284.1 ft | 100 | 1979 |
| Elm ST over Pierson Creek | Fair | 90.9 ft | 96 | 1982 |
| D 65 310th ST over I-29 | Fair | 234.9 ft | 90 | 1959 |
| K-35 over I-29 | Fair | 240.2 ft | 90 | 1959 |
| FM over Stream | Fair | 22.0 ft | 90 | 1959 |
| Local over West Fork Little Sioux | Fair | 212.9 ft | 80 | 1952 |
| FM over Elliott Creek | Fair | 30.8 ft | 80 | 1994 |
| FM over Wolf Creek | Fair | 104.0 ft | 71 | 1967 |
| FM over Wolf Creek | Fair | 104.0 ft | 71 | 1967 |
| FM over Stream | Fair | 24.9 ft | 71 | 1958 |
| Local over Elliott Creek | Fair | 128.0 ft | 71 | 1979 |
| Local over Little Whiskey Creek | Fair | 25.9 ft | 71 | 1984 |
| Local over Stream | Fair | 42.0 ft | 71 | 1999 |
| Knox AVE over Small Creek | Fair | 36.4 ft | 60 | 1979 |
| Local over Mud Creek | Fair | 115.2 ft | 60 | 1978 |
| Local over Stream | Fair | 87.9 ft | 50 | 2006 |
| Local over Stream | Fair | 24.9 ft | 50 | 1985 |
| Local over Stream | Fair | 68.9 ft | 50 | 1980 |
| Local over Mcelhaney Creek | Fair | 40.0 ft | 50 | 2007 |
| Local over Big Whiskey Creek | Fair | 128.0 ft | 50 | 2004 |
| Local over W Fork Little Sioux R. | Fair | 204.1 ft | 45 | 1986 |
| Local over Stream | Fair | 24.0 ft | 41 | 1998 |
| Local over Stream | Fair | 54.1 ft | 40 | 1999 |
| Local over Big Whiskey | Fair | 128.0 ft | 40 | 1978 |
| Local over Deer Creek | Fair | 44.0 ft | 40 | 1990 |
| Local over Elliott Creek | Fair | 128.9 ft | 40 | 1979 |
| Local over Wolf Creek | Fair | 153.9 ft | 34 | 1980 |
| Local over Stream | Fair | 52.2 ft | 34 | 2004 |
| Local over Elliot Creek | Fair | 103.0 ft | 34 | 1980 |
| Local over Mcelhaney Creek | Fair | 90.9 ft | 34 | 1982 |
| Local over Elliott Creek | Fair | 38.1 ft | 34 | 1977 |
| Local over Garretson Drainage Ditch | Fair | 127.0 ft | 30 | 1984 |
| Local over Farmers Ditch | Fair | 87.9 ft | 30 | 2000 |
| Local over Stream | Fair | 38.1 ft | 30 | 2006 |
| Local over Elliot Creek | Fair | 24.0 ft | 30 | 2003 |
| Local over Stream | Fair | 35.1 ft | 30 | 1977 |
| Local over Big Whiskey Creek | Fair | 103.0 ft | 30 | 1978 |
| Local over Reynolds Creek | Fair | 39.0 ft | 26 | 2001 |
| Local over Small Stream | Fair | 35.1 ft | 26 | 1984 |
| Local over Stream | Fair | 23.0 ft | 26 | 2001 |
| Local over Reynolds Creek | Fair | 25.9 ft | 26 | 1992 |
| Local over Wright Creek | Fair | 155.8 ft | 26 | 1983 |
| Local over Stream | Fair | 76.1 ft | 26 | 1955 |
| Local over Stream | Fair | 128.0 ft | 26 | 2004 |
| Local over Stream | Fair | 70.9 ft | 26 | 2005 |
| 120th ST over Stream | Fair | 38.1 ft | 26 | 2006 |
| Local over Stream | Fair | 39.0 ft | 26 | 2005 |
| Local over Big Whiskey Creek | Fair | 43.0 ft | 26 | 2006 |
| Local over Morehead Creek | Fair | 140.1 ft | 25 | 1987 |
| Local over Farmers Ditch | Fair | 116.1 ft | 20 | 1980 |
| FM over Stream | Fair | 43.0 ft | 20 | 2006 |
| Local over Bacon Creek Trib. | Fair | 24.9 ft | 20 | 1980 |
| Local over Bacon Creek | Fair | 128.0 ft | 20 | 1984 |
| 120th ST over Mud Creek | Fair | 68.9 ft | 20 | 1981 |
| Local over Whiskey Creek | Fair | 37.1 ft | 20 | 2005 |
| Story AVE over Stream | Fair | 43.0 ft | 15 | 2004 |
| Local over Morehead Creek | Fair | 44.0 ft | 15 | 1990 |
| Local over Small Stream | Fair | 24.9 ft | 15 | 1986 |
| Local over Elliott Creek | Fair | 103.0 ft | 15 | 1978 |
| Jasper AVE over Mc Elhaney Creek | Fair | 34.1 ft | 15 | 2003 |
| Local over Stream | Fair | 38.1 ft | 15 | 1977 |
| Garner AVE over Stream | Fair | 71.9 ft | 15 | 1985 |
| Local over Small Stream | Fair | 24.0 ft | 11 | 2001 |
| Local over Stream | Fair | 24.9 ft | 11 | 2001 |
| Local over Stream | Fair | 35.1 ft | 11 | 1992 |
| Local over Stream | Fair | 92.8 ft | 11 | 1950 |
| Local over Mcelhaney Creek | Fair | 115.2 ft | 11 | 1984 |
| Local over Stream | Fair | 38.1 ft | 11 | 2003 |
| K64 over Side Ditch Stream | Fair | 21.0 ft | 10 | 1959 |
| 250th ST over Wolf Creek | Fair | 38.1 ft | 10 | 2000 |
| Minnesota AVE over Stream | Fair | 42.0 ft | 10 | 1989 |
| Local over Coon Creek | Fair | 128.0 ft | 5 | 1988 |
| Local over Wolf Creek | Fair | 32.2 ft | 5 | 1935 |
| I29 NB Off Ramp over Perry Creek Conduit | Good | 93.5 ft | 91,000 | 2017 |
| US 77 over I 29 & Ia 12 NB | Good | 154.9 ft | 26,900 | 2012 |
| US 75 over Stream | Good | 21.0 ft | 18,200 | 1999 |
| I 29 Ia 12 NB over Perry Creek Conduit | Good | 88.6 ft | 16,450 | 2017 |
| I 29 SB over Big Sioux River | Good | 557.1 ft | 15,600 | 1990 |
| I 29 SB over Floyd BLVD | Good | 227.4 ft | 15,400 | 2019 |
| Outer Drive over Floyd River & Cnic Rr | Good | 912.1 ft | 14,264 | 2009 |
| I 29 SB over Ia 12 SB Virginia ST | Good | 236.9 ft | 13,700 | 2019 |
| I 29 NB over Virginia ST | Good | 236.9 ft | 13,700 | 2017 |
| I 29 NB over Ia376 Singing Hills BLVD | Good | 258.9 ft | 12,350 | 2011 |
| SB I 29 over Ia376 Singing Hills BLVD | Good | 258.9 ft | 12,350 | 2012 |
| Ia 376 over Cunningham DR | Good | 163.1 ft | 11,800 | 1978 |
| US 75 over Stream | Good | 22.0 ft | 10,400 | 2000 |
| Floyd BLVD over Creek | Good | 28.9 ft | 10,300 | 2007 |
| US 75 NB over Stone AVE | Good | 170.9 ft | 9,050 | 1999 |
| US 75 SB over Stone AVE | Good | 170.9 ft | 9,050 | 1999 |
| W 19th ST over Perry Creek | Good | 181.1 ft | 8,606 | 1994 |
| Iowa 12 over I-29 | Good | 242.1 ft | 8,200 | 2009 |
| 3rd ST over Perry Creek Conduit | Good | 78.4 ft | 7,065 | 2013 |
| W 28th ST over Perry Creek | Good | 151.9 ft | 6,989 | 1995 |
| 6th ST over Perry Creek Conduit | Good | 49.9 ft | 5,704 | 2000 |
| EB US 20 over Big Whiskey Creek | Good | 206.0 ft | 5,600 | 2010 |
| US 75 SB over Outer DR | Good | 241.1 ft | 5,600 | 2000 |
| US 75 NB over Outer DR | Good | 241.1 ft | 5,600 | 2000 |
| US 75 NB over Taft ST | Good | 215.9 ft | 5,500 | 1999 |
| US 75 SB over Taft ST | Good | 215.9 ft | 5,500 | 1999 |
| WB US 20 over Elliot Creek | Good | 183.1 ft | 5,250 | 2006 |
| W 7th over Perry Creek | Good | 157.2 ft | 5,086 | 1900 |
| US 20 EB over W Fk Little Sioux River | Good | 223.1 ft | 4,600 | 2015 |
| W 14th ST over Perry Creek | Good | 213.9 ft | 4,284 | 2006 |
| W Clifton ST over Bacon Creek | Good | 24.9 ft | 4,243 | 2005 |
| WB US 20 over W Fk Little Sioux River | Good | 223.1 ft | 4,150 | 2004 |
| Cunningham DR over Old Floyd River Channel | Good | 315.9 ft | 3,475 | 1997 |
| I29nbnebraskastrp over Ia 12 & Virginia ST | Good | 576.1 ft | 3,460 | 2017 |
| US 20 EB over Wolf Creek | Good | 150.9 ft | 3,250 | 2018 |
| US 20 WB over Wolf Creek | Good | 150.9 ft | 3,250 | 2015 |
| Leech AVE over Old Floyd River Channel | Good | 140.1 ft | 3,022 | 1990 |
| Aviation BLVD over Up Rr & Harbor DR | Good | 249.0 ft | 2,527 | 2000 |
| Ia 141 over Garretson Ditch | Good | 137.8 ft | 2,130 | 2018 |
| D25 Old HWY 141 over Big Whiskey Creek | Good | 89.9 ft | 2,054 | 2017 |
| Ia 141 over Drainage Ditch | Good | 124.3 ft | 1,960 | 2010 |
| Ia 140 over Stream | Good | 73.2 ft | 1,930 | 2003 |
| Ia 141 over Little Sioux River | Good | 274.0 ft | 1,810 | 1927 |
| Taft ST over Stream | Good | 21.0 ft | 1,721 | 2000 |
| 38th ST over Perry Creek | Good | 140.1 ft | 1,699 | 2016 |
| Ia 376 Ramp over Drainage | Good | 28.9 ft | 1,560 | 2001 |
| Ia 141 over Drainage Ditch | Good | 24.9 ft | 1,490 | 1959 |
| Ia 141 over Drainage Ditch | Good | 24.9 ft | 1,470 | 1959 |
| Ia 141 over Drainage Ditch | Good | 28.9 ft | 1,470 | 1959 |
| Frelon Drive over Drainage Ditch | Good | 21.0 ft | 1,291 | 1998 |
| FM over Drainage | Good | 28.9 ft | 1,236 | 1999 |
| Ia 175 over Drainage Ditch | Good | 43.0 ft | 1,230 | 1951 |
| S Alice ST over Bacon Creek | Good | 70.9 ft | 1,225 | 1997 |
| Bluff ST over Perry Creek | Good | 215.9 ft | 1,181 | 2010 |
| D12 110th ST over Creek | Good | 28.9 ft | 1,168 | 2022 |
| Main ST over Drainage | Good | 24.0 ft | 1,167 | 1970 |
| Kings HWY over Perry Creek | Good | 129.9 ft | 1,071 | 2011 |
| Ia 31 over Stream | Good | 40.0 ft | 1,070 | 2001 |
| K25 275th ST over I 29 | Good | 405.8 ft | 1,048 | 2016 |
| Ia 31 over Stream | Good | 21.0 ft | 1,030 | 1966 |
| FM over Farmers Ditch | Good | 140.1 ft | 1,008 | 1999 |
| FM over Little Whiskey Creek | Good | 140.1 ft | 1,008 | 1999 |
| K64(moville Rd) over Stream | Good | 21.0 ft | 957 | 2012 |
| Ia 175 over Koker Creek | Good | 24.9 ft | 930 | 1986 |
| K64 over Drainage | Good | 70.9 ft | 928 | 2021 |
| Ia 31 over Smokey Hollow Creek | Good | 70.9 ft | 840 | 2001 |
| Old HWY 141 over Fork Of Little Sioux | Good | 214.9 ft | 808 | 2002 |
| FM over Little Sioux River | Good | 409.1 ft | 797 | 2006 |
| FM over Creek | Good | 103.0 ft | 649 | 2008 |
| D 25 over Small Stream | Good | 24.9 ft | 578 | 1975 |
| Old HWY 141 over Wolf Creek | Good | 180.1 ft | 569 | 2002 |
| Country Club over Hanford Creek | Good | 42.0 ft | 488 | 2000 |
| Walnut ST over Creek | Good | 21.0 ft | 450 | 2014 |
| Walnut ST over Elliott Creek | Good | 152.9 ft | 450 | 2014 |
| K64 Haskell AVE over Stream | Good | 103.0 ft | 429 | 2020 |
| 2nd AVE over Drainage | Good | 24.9 ft | 411 | 2004 |
| D2 110th ST over Creek | Good | 83.0 ft | 409 | 2020 |
| FM over Wolf Creek | Good | 128.0 ft | 399 | 2009 |
| FM over Wolf Creek | Good | 152.9 ft | 399 | 2010 |
| K49 Emmett AVE over Elliott Creek | Good | 92.8 ft | 390 | 2016 |
| Old Ia 141 over Drainage | Good | 24.9 ft | 373 | 2006 |
| D38 (220th St) over Big Creek | Good | 150.9 ft | 369 | 2011 |
| FM over Wolf Creek | Good | 167.0 ft | 330 | 2009 |
| FM over Stream | Good | 24.9 ft | 330 | 2008 |
| FM over Reynolds Creek | Good | 167.0 ft | 309 | 1986 |
| Mcdonald BLVD over Perry Creek | Good | 149.9 ft | 283 | 2016 |
| W 23rd ST over Perry Creek | Good | 213.9 ft | 283 | 2011 |
| 150th ST over Elliot Creek | Good | 123.0 ft | 210 | 2019 |
| Correctionville RD over Whiskey Creek | Good | 196.9 ft | 210 | 2023 |
| 160th ST over Three Mile Creek | Good | 24.9 ft | 199 | 2002 |
| D12 110th ST over Pierson Creek | Good | 130.9 ft | 199 | 2023 |
| Local over Mcelhaney Creek | Good | 128.0 ft | 199 | 1987 |
| L36 over Coon Creek | Good | 130.9 ft | 180 | 2021 |
| Glen Ellen RD over Drainage Ditch | Good | 123.0 ft | 170 | 2012 |
| D 30 (180th St) over Creek | Good | 81.0 ft | 159 | 2011 |
| Old HWY 20 over Small Stream | Good | 23.0 ft | 159 | 2007 |
| FM over Creek | Good | 128.0 ft | 120 | 2004 |
| County Home RD over Stream | Good | 70.9 ft | 120 | 2011 |
| Local over Stream | Good | 132.9 ft | 120 | 2008 |
| FM over Little Sioux River | Good | 351.0 ft | 110 | 1992 |
| Local over W Br Little Sioux River | Good | 203.1 ft | 110 | 1987 |
| Local over Stream | Good | 128.0 ft | 80 | 1997 |
| 290th ST over Stream | Good | 24.9 ft | 60 | 2002 |
| FM over Farmers Ditch | Good | 168.0 ft | 60 | 1994 |
| L 14 (knox Ave) over Wolf Creek | Good | 81.0 ft | 60 | 2012 |
| Local over Mud Creek | Good | 142.1 ft | 60 | 1991 |
| Grundy AVE over Beaver Creek | Good | 24.9 ft | 50 | 2015 |
| L43 Union AVE over Creek | Good | 70.9 ft | 50 | 2017 |
| 200th ST over West Fork Little Sioux | Good | 150.9 ft | 50 | 2021 |
| Jewell AVE over Stream | Good | 101.0 ft | 50 | 2021 |
| 120th ST over Big Whiskey Creek | Good | 90.9 ft | 50 | 2023 |
| Local over West Fork | Good | 216.9 ft | 50 | 2003 |
| Local over Reynolds Creek | Good | 154.9 ft | 45 | 1982 |
| Local over Miller Creek | Good | 167.0 ft | 45 | 1991 |
| Local over Miller Creek | Good | 35.1 ft | 45 | 1991 |
| Local over Little Sioux River | Good | 351.0 ft | 45 | 1994 |
| D30 185th ST over Wolf Creek | Good | 101.0 ft | 45 | 2015 |
| Local over Big Whiskey Creek | Good | 189.0 ft | 45 | 2004 |
| 140th ST over Mcelhaney Creek | Good | 142.1 ft | 45 | 1993 |
| Morgan Trail over Miller Creek | Good | 92.8 ft | 41 | 2016 |
| 325th ST over Reynolds Creek | Good | 121.1 ft | 40 | 2015 |
| K67 Hancock AVE over Wolf Creek | Good | 112.9 ft | 40 | 2019 |
| Local over Deer Creek | Good | 41.0 ft | 40 | 2007 |
| Local over Stream | Good | 38.1 ft | 40 | 2007 |
| Local over Mcelhaney Creek | Good | 128.0 ft | 40 | 1994 |
| Local over Stream | Good | 29.9 ft | 34 | 1994 |
| Pocahontas AVE over Bacon Creek | Good | 92.8 ft | 34 | 2014 |
| Local over Stream | Good | 36.1 ft | 34 | 1990 |
| Local over Stream | Good | 167.0 ft | 34 | 2004 |
| Local over Stream | Good | 24.9 ft | 34 | 1997 |
| Local over Mud Creek | Good | 154.9 ft | 34 | 1997 |
| Local over Small | Good | 39.0 ft | 34 | 2008 |
| FM over Creek | Good | 24.9 ft | 30 | 1990 |
| FM over Creek | Good | 116.1 ft | 30 | 2007 |
| D53 280th ST over Drainage Ditch Garretson | Good | 123.0 ft | 30 | 2016 |
| 290th ST over Wolf Creek | Good | 247.0 ft | 30 | 2013 |
| Local over East Branch Wolf Creek | Good | 25.9 ft | 30 | 1987 |
| K67 Hancock AVE over Wolf Creek | Good | 112.9 ft | 30 | 2020 |
| Local over Pierson Creek | Good | 144.0 ft | 30 | 2006 |
| FM over Creek | Good | 23.0 ft | 30 | 2006 |
| Lee AVE over Stream | Good | 40.0 ft | 26 | 2018 |
| Local over Wolf Creek | Good | 25.9 ft | 26 | 1991 |
| Local over Wolf Creek | Good | 167.0 ft | 26 | 2004 |
| FM over Wolf Creek | Good | 128.0 ft | 26 | 2005 |
| Local over Wolf Creek | Good | 140.1 ft | 26 | 2006 |
| 100th ST over Stream | Good | 24.9 ft | 26 | 2005 |
| Local over Creek | Good | 24.9 ft | 26 | 2005 |
| 240th ST over Stream | Good | 21.0 ft | 20 | 2020 |
| Local over Stream | Good | 24.9 ft | 20 | 2004 |
| 220th ST over Creek | Good | 24.9 ft | 20 | 2018 |
| Mason AVE over Little Sioux River | Good | 210.0 ft | 20 | 2021 |
| Local over Stream | Good | 24.0 ft | 20 | 2002 |
| Local over Stream | Good | 32.2 ft | 20 | 2001 |
| Kossuth AVE over Stream | Good | 34.1 ft | 20 | 2019 |
| Local over Small Stream | Good | 32.2 ft | 20 | 2002 |
| 200th ST over Stream | Good | 21.0 ft | 15 | 2018 |
| 200th ST over Stream | Good | 21.0 ft | 15 | 2018 |
| Michigan AVE over Stream | Good | 37.1 ft | 15 | 2012 |
| Local over Big Creek | Good | 142.1 ft | 15 | 1992 |
| Local over Wolf Creek | Good | 180.1 ft | 15 | 1985 |
| 200th ST over Whiskey Creek | Good | 28.9 ft | 15 | 2001 |
| Local over Small | Good | 23.0 ft | 15 | 2009 |
| 120th ST over Elliott Creek | Good | 83.0 ft | 15 | 2017 |
| Local over Elliott Creek | Good | 153.9 ft | 15 | 1993 |
| Local over Mud Creek | Good | 119.1 ft | 15 | 2008 |
| 320th ST over Stream | Good | 84.0 ft | 11 | 2004 |
| Michigan AVE over Big Wright Creek | Good | 149.0 ft | 11 | 2014 |
| 130th ST over Stream | Good | 37.1 ft | 11 | 2023 |
| FM over Creek | Good | 23.0 ft | 11 | 2006 |
| 280th ST over Stream | Good | 82.0 ft | 5 | 2016 |
| Pocahontas AVE over Reynolds Creek | Good | 25.9 ft | 5 | 2003 |
| Local over Miller Creek | Good | 115.2 ft | 5 | 1997 |
| 330th ST over Stream | Good | 83.0 ft | 5 | 2017 |
| 320th ST over Wolf Creek | Good | 123.0 ft | 5 | 2019 |
| 260th ST over Stream | Good | 21.0 ft | 5 | 2021 |
| 170th ST over Wolf Creek | Good | 103.0 ft | 5 | 2019 |
| Local over Mcelhaney Creek | Good | 103.0 ft | 5 | 1982 |
| Fayette AVE over Stream | Good | 54.1 ft | 5 | 1994 |