| FM over Skunk River | Poor | 150.9 ft | 698 | 1974 |
| Vail AVE over Over Cc Rr | Poor | 157.2 ft | 578 | 1932 |
| Park AVE over Lyons Creek | Poor | 44.9 ft | 490 | 1947 |
| Fas 3556 over Creek | Poor | 29.9 ft | 478 | 1947 |
| FM over Skunk River | Poor | 138.1 ft | 459 | 1992 |
| FM over Drainage Ditch | Poor | 55.1 ft | 319 | 1960 |
| FM over Creek | Poor | 78.1 ft | 240 | 1957 |
| Local over Creek | Poor | 38.1 ft | 131 | 1918 |
| 280th ST over Boone River | Poor | 186.0 ft | 62 | 1902 |
| Local over Boone River | Poor | 282.2 ft | 60 | 1954 |
| FM over Boone River | Poor | 304.1 ft | 60 | 1955 |
| Local over Ioway Creek | Poor | 65.0 ft | 45 | 1917 |
| Inkpaduta AVE over Boone River | Poor | 207.0 ft | 40 | 1907 |
| FM over Drainage Ditch | Poor | 42.0 ft | 34 | 1920 |
| FM over Long Dick Creek | Poor | 44.9 ft | 30 | 1924 |
| Local over Drainage Ditch | Poor | 49.9 ft | 30 | 1923 |
| Local over Drainage Ditch | Poor | 32.2 ft | 30 | 1919 |
| FM over Keigley Creek | Poor | 42.0 ft | 26 | 1949 |
| FM over Drainage Ditch | Poor | 42.0 ft | 26 | 1923 |
| Local over Boone River | Poor | 182.1 ft | 26 | 1924 |
| Local over Long Dick CR | Poor | 33.1 ft | 20 | 1924 |
| Local over Long Dick CR | Poor | 40.0 ft | 20 | 1916 |
| Local over Creek | Poor | 21.0 ft | 20 | 1926 |
| Local over Bear CR | Poor | 23.0 ft | 15 | 1918 |
| Local over Ioway Creek | Poor | 82.0 ft | 15 | 1952 |
| FM over Drainage Ditch | Poor | 69.9 ft | 15 | 1949 |
| Local over Brewers CR | Poor | 30.8 ft | 15 | 1926 |
| Local over Drainage Ditch | Poor | 32.2 ft | 15 | 1922 |
| Local over Drainage Ditch | Poor | 32.2 ft | 15 | 1975 |
| FM over Drainage Ditch | Poor | 30.8 ft | 11 | 1923 |
| Local over Drainage Ditch | Poor | 33.1 ft | 5 | 1925 |
| Local Legno over Stream | Poor | 39.0 ft | 0 | 1920 |
| I 35 over Drainage Ditch | Fair | 24.0 ft | 27,200 | 1966 |
| I-35 over Tuttle Creek | Fair | 25.9 ft | 17,400 | 1967 |
| I 35 NB over Ia 175 | Fair | 252.0 ft | 11,850 | 1966 |
| I 35 SB over Ia 175 | Fair | 252.0 ft | 11,850 | 1966 |
| US 20 & Ia 17 over Waterway | Fair | 21.0 ft | 11,200 | 1977 |
| US 20 over Drainage Ditch #4 | Fair | 24.9 ft | 9,600 | 1968 |
| SB I-35 over Cc Rr & 210th ST | Fair | 265.1 ft | 8,500 | 1972 |
| I 35 NB over Stream | Fair | 92.8 ft | 8,300 | 1972 |
| NB I-35 over Co RD D-25 | Fair | 143.0 ft | 8,250 | 1974 |
| SB I-35 over Stream | Fair | 92.8 ft | 8,200 | 1972 |
| I 35 SB over SR D25 | Fair | 143.0 ft | 7,950 | 1974 |
| Superior ST over Brewers Creek | Fair | 133.9 ft | 5,839 | 1923 |
| EB 20 & SB 17 over R-27 | Fair | 142.1 ft | 5,500 | 1978 |
| EB US 20 over Boone River | Fair | 325.1 ft | 5,050 | 1974 |
| WB US 20 over Boone River/rec Trail | Fair | 325.1 ft | 5,050 | 1974 |
| EB US 20 over R-38 | Fair | 138.1 ft | 4,950 | 1975 |
| WB US 20 over R-38 | Fair | 138.1 ft | 4,950 | 1975 |
| EB US 20 over I-35 | Fair | 261.2 ft | 4,700 | 1968 |
| 2nd ST over Boone River | Fair | 294.0 ft | 3,797 | 1950 |
| Ia 17 over Boone River | Fair | 326.1 ft | 3,460 | 1972 |
| Overpass DR over Cc Rr | Fair | 208.0 ft | 3,353 | 1931 |
| WB US 20 over I-35 | Fair | 261.2 ft | 3,350 | 1968 |
| Des Moines ST over Brewer Creek | Fair | 44.0 ft | 3,175 | 1989 |
| 2nd ST over Lyon Creek | Fair | 89.9 ft | 2,735 | 1978 |
| Ia 17 over Ioway Creek | Fair | 132.9 ft | 2,380 | 1979 |
| Ia 175 over Long Dick Creek | Fair | 23.0 ft | 2,180 | 1937 |
| Ia 175 over Drainage Ditch | Fair | 103.0 ft | 2,100 | 1977 |
| Ia 175 over S Skunk River | Fair | 191.9 ft | 1,920 | 1979 |
| Dubuque ST over Boone River | Fair | 344.2 ft | 1,695 | 1954 |
| US 69 over Drainage Ditch | Fair | 113.8 ft | 1,620 | 2009 |
| US 69 over Cc Rr | Fair | 170.9 ft | 1,160 | 1973 |
| SR D-65 over I-35 | Fair | 222.1 ft | 1,117 | 1965 |
| Ia 175 over Ioway Creek | Fair | 75.1 ft | 1,090 | 1972 |
| Des Moines ST over Boone River | Fair | 342.8 ft | 1,065 | 1954 |
| SR D-20 over I-35 | Fair | 292.0 ft | 828 | 1972 |
| FM over Ioway Creek | Fair | 23.0 ft | 559 | 1982 |
| FM over Drainage Ditch | Fair | 22.0 ft | 509 | 1976 |
| FM over Boone River | Fair | 308.1 ft | 499 | 1964 |
| FM over Boone River | Fair | 295.9 ft | 478 | 1939 |
| FM over Boone River | Fair | 390.1 ft | 429 | 1973 |
| Willson AVE over Brewer Creek | Fair | 44.9 ft | 377 | 1920 |
| FM over White Fox Creek | Fair | 128.0 ft | 330 | 1960 |
| FM over Skunk River | Fair | 62.0 ft | 270 | 1962 |
| Kantor AVE over Lyons Creek | Fair | 44.9 ft | 270 | 2003 |
| FM over Buck Creek | Fair | 25.9 ft | 240 | 1975 |
| FM over Buck Creek | Fair | 25.9 ft | 199 | 1975 |
| FM over Brewers Creek | Fair | 30.8 ft | 131 | 1978 |
| SR D-47 over I-35 | Fair | 217.8 ft | 100 | 1966 |
| Local over Skunk River | Fair | 53.1 ft | 100 | 1952 |
| Local over Skunk River | Fair | 53.1 ft | 90 | 1952 |
| SR 350th Street over I-35 | Fair | 217.8 ft | 71 | 1966 |
| Local over Buck Creek | Fair | 25.9 ft | 71 | 1994 |
| FM over Drainage Ditch | Fair | 24.9 ft | 50 | 1924 |
| Local over White Fox CR | Fair | 127.0 ft | 40 | 1955 |
| Local over Brewers Creek | Fair | 23.0 ft | 34 | 1971 |
| Local over White Fox CR | Fair | 103.0 ft | 30 | 1978 |
| Local over Long Dick CR | Fair | 78.1 ft | 26 | 1955 |
| FM over Skunk River | Fair | 78.1 ft | 26 | 1955 |
| Local over Drainage Ditch | Fair | 32.2 ft | 26 | 1924 |
| Local over Drainage Ditch | Fair | 78.1 ft | 26 | 1970 |
| Local over Drainage Ditch | Fair | 78.1 ft | 26 | 1970 |
| Local over Keigley Creek | Fair | 78.1 ft | 20 | 1955 |
| FM over Ioway Creek | Fair | 38.1 ft | 20 | 1924 |
| Local over Drainage Ditch | Fair | 23.0 ft | 20 | 1971 |
| Local over Skunk River | Fair | 78.1 ft | 20 | 1955 |
| Local over Long Dick CR | Fair | 78.1 ft | 15 | 1955 |
| Local over Keigley CR | Fair | 78.1 ft | 15 | 1977 |
| Local over Keigley CR | Fair | 78.1 ft | 15 | 1954 |
| Local over Crooked Creek | Fair | 78.1 ft | 15 | 1970 |
| Local over Skunk River | Fair | 44.0 ft | 15 | 1949 |
| Local over Drainage Ditch | Fair | 24.9 ft | 11 | 1929 |
| Local over Creek | Fair | 25.9 ft | 11 | 1918 |
| I 35 over Stream | Good | 24.0 ft | 26,900 | 1965 |
| I-35 over Drainage Ditch 23 & 31 | Good | 21.0 ft | 16,600 | 1972 |
| US 20 over Drainage Ditch #4 | Good | 24.9 ft | 9,600 | 1968 |
| US 20 over Drainage Ditch #4 | Good | 27.9 ft | 9,600 | 1968 |
| US 20 over Tuttle D.d.#4 | Good | 24.9 ft | 9,400 | 1968 |
| NB I-35 over Cc Rr & 210th ST | Good | 265.1 ft | 8,800 | 1972 |
| Ia 17 over US 20 | Good | 268.0 ft | 6,170 | 1974 |
| WB 20 & NB 17 over R-27 | Good | 142.1 ft | 5,500 | 1978 |
| 220th ST over Drainage Ditch | Good | 79.1 ft | 2,892 | 2010 |
| Ia 175 over Up Rr | Good | 188.0 ft | 2,100 | 1979 |
| Beach ST over Brewers Creek | Good | 78.1 ft | 1,745 | 1995 |
| White Fox RD over Boone River | Good | 325.1 ft | 1,282 | 1982 |
| US 69 over US 20 | Good | 219.2 ft | 1,230 | 1968 |
| 380th ST over Long Dick Creek | Good | 21.0 ft | 797 | 2000 |
| Ia 17 over US 20 | Good | 257.9 ft | 650 | 1978 |
| FM over Keigley Creek | Good | 29.9 ft | 589 | 1999 |
| FM over Long Dick Creek | Good | 62.0 ft | 559 | 1997 |
| FM over Long Dick Creek | Good | 24.9 ft | 559 | 1997 |
| FM over Boone River | Good | 313.0 ft | 509 | 2009 |
| SR D-41 over I-35 | Good | 217.8 ft | 399 | 1966 |
| E. Ohio ST over Brewer Creek | Good | 58.1 ft | 393 | 1996 |
| Local over Drainage Ditch | Good | 118.1 ft | 379 | 2006 |
| FM RD R 77 over US 20 | Good | 268.0 ft | 290 | 1990 |
| FM over Drainage Ditch | Good | 23.0 ft | 265 | 2005 |
| FM over Drainage Ditch | Good | 22.0 ft | 249 | 2004 |
| D41 280th ST over Creek | Good | 29.9 ft | 234 | 2015 |
| Co RD R 61 over U.s. 20 | Good | 253.0 ft | 159 | 1990 |
| Columbia ST over Lyons Creek | Good | 58.1 ft | 141 | 1982 |
| 360th ST over Skunk River | Good | 121.1 ft | 80 | 2013 |
| 280th ST over Boone River | Good | 457.0 ft | 80 | 2019 |
| Local RD over I-35 | Good | 217.8 ft | 71 | 1965 |
| Local over Creek | Good | 103.0 ft | 71 | 2006 |
| Local over Ioway Creek | Good | 23.0 ft | 71 | 1991 |
| Tollman AVE over US 20 | Good | 210.0 ft | 60 | 1967 |
| Ziegler AVE over Bear CR | Good | 34.1 ft | 60 | 2012 |
| Local over Keigley Creek | Good | 21.0 ft | 50 | 1994 |
| 240th ST over Drainage Ditch | Good | 22.0 ft | 50 | 2011 |
| SR D-36 over I-35 | Good | 222.1 ft | 45 | 1967 |
| Tollman AVE over Drainage Ditch | Good | 34.1 ft | 45 | 2012 |
| Lockwood AVE over US 20 | Good | 268.0 ft | 45 | 1975 |
| 203rd ST over Lyon Creek | Good | 21.0 ft | 40 | 2019 |
| 280th ST over Skunk River | Good | 35.1 ft | 34 | 2020 |
| 260th ST over Drainage Ditch | Good | 34.1 ft | 34 | 2017 |
| Local over White Fox Creek | Good | 128.0 ft | 34 | 1994 |
| Mcmurray AVE over Keigley Branch | Good | 24.9 ft | 34 | 2017 |
| Xircus AVE over Long Dick Creek | Good | 39.0 ft | 30 | 2022 |
| Local over Skunk River | Good | 90.9 ft | 30 | 1993 |
| 160th ST over Drainage Ditch | Good | 30.8 ft | 30 | 2010 |
| 175th ST over Buck Creek | Good | 26.9 ft | 30 | 2000 |
| Local over Prairie CR | Good | 24.0 ft | 26 | 2006 |
| Local over Buck CR | Good | 25.9 ft | 26 | 2008 |
| Local over White Fox Creek | Good | 45.9 ft | 26 | 1989 |
| Poplar Grove AVE over US 20 | Good | 268.0 ft | 26 | 1975 |
| 370th ST over Drainage Ditch | Good | 32.2 ft | 20 | 2017 |
| Local over Prairie CR | Good | 34.1 ft | 20 | 2008 |
| 390th ST over Drainage Ditch | Good | 24.0 ft | 20 | 2004 |
| Ziegler AVE over US 20 | Good | 268.0 ft | 20 | 1990 |
| Local over Ioway Creek | Good | 97.1 ft | 11 | 1988 |
| Local over Drainage Ditch | Good | 33.1 ft | 11 | 2011 |
| 170th ST over Drainage Ditch | Good | 26.9 ft | 11 | 2012 |
| Local over Drainage Ditch | Good | 27.9 ft | 11 | 2005 |