| FM Easton Trail over Allen Creek | Poor | 40.0 ft | 335 | 1969 |
| FM Laredo AVE over Allen Creek | Poor | 102.0 ft | 139 | 1942 |
| L23 Laredo AVE over Steer Creek | Poor | 21.0 ft | 139 | 1942 |
| 8th Street over Boyer River | Poor | 146.0 ft | 123 | 1900 |
| FM - 335th ST over Mosquito Creek | Poor | 241.1 ft | 120 | 1920 |
| FM Tabor AVE over Small Stream | Poor | 24.0 ft | 110 | 1956 |
| Loc Canal ST over Willow River | Poor | 109.9 ft | 100 | 1916 |
| Medford AVE over Willow River | Poor | 190.9 ft | 89 | 1900 |
| Loc 128 Trail over Boyer River | Poor | 162.1 ft | 89 | 1940 |
| 198th ST over Small Creek | Poor | 84.0 ft | 79 | 1950 |
| FM & 155th ST over Mud Creek | Poor | 91.9 ft | 79 | 1940 |
| FM - 335th ST over Small Creek | Poor | 44.9 ft | 71 | 1952 |
| Vienna AVE over Pigeon Creek | Poor | 91.9 ft | 60 | 1967 |
| Jasper Trail over Small Creek | Poor | 62.0 ft | 50 | 1900 |
| Local Taylor Av over Small Creek | Poor | 43.0 ft | 45 | 1955 |
| Neely Trail over Willow Creek | Poor | 148.0 ft | 45 | 1940 |
| Taylor AVE over Pigeon Creek | Poor | 132.9 ft | 40 | 1920 |
| Local 120th ST over Little Sioux River | Poor | 316.9 ft | 40 | 1971 |
| 288th ST over Mosquito Creek | Poor | 149.9 ft | 34 | 1940 |
| Toledo AVE over Pigeon Creek | Poor | 128.0 ft | 34 | 1951 |
| 242nd Trail over Drainage Ditch | Poor | 24.6 ft | 34 | 2013 |
| Parker Trail over Small Creek | Poor | 32.2 ft | 29 | 1916 |
| Mobile AVE over Hoffman Creek | Poor | 83.0 ft | 29 | 1940 |
| Loc 215th ST over Pigeon Creek | Poor | 60.0 ft | 26 | 1955 |
| 280th ST over Mosquito Creek | Poor | 181.1 ft | 20 | 1940 |
| 305th ST over Keg Creek | Poor | 42.0 ft | 20 | 1957 |
| 315th ST over Mosquito Creek | Poor | 222.1 ft | 20 | 1930 |
| Loc 335th ST over Allen Creek | Poor | 62.0 ft | 20 | 1959 |
| FM & Nash Trail over Allen Creek | Poor | 66.9 ft | 20 | 1976 |
| 240th Street over Pigeon Creek | Poor | 86.0 ft | 15 | 1967 |
| 180th ST over Willow Creek | Poor | 164.0 ft | 15 | 1975 |
| 325th ST over Keg Creek | Poor | 58.1 ft | 11 | 1900 |
| 325th ST over Pigeon Creek | Poor | 106.0 ft | 11 | 1960 |
| Reno AVE over Six Mile Creek | Poor | 113.8 ft | 11 | 1930 |
| 250th ST over Allen Creek | Poor | 60.0 ft | 11 | 1965 |
| Loc 210th ST over Little Pigeon | Poor | 92.8 ft | 11 | 1930 |
| 155th ST over Willow River | Poor | 166.0 ft | 11 | 1930 |
| Mobile AVE over Allen Creek | Poor | 61.0 ft | 11 | 1957 |
| 185th Lane over Allen Creek | Poor | 47.9 ft | 5 | 1986 |
| Kendall Trail over Steer Creek | Poor | 73.2 ft | 5 | 1969 |
| 125th ST over Small Stream | Poor | 91.9 ft | 5 | 1960 |
| US 30 over Willow Creek | Fair | 132.9 ft | 10,300 | 1972 |
| NB I-29 over Boyer River | Fair | 414.0 ft | 10,050 | 1958 |
| SB I-29 over Boyer River | Fair | 414.0 ft | 10,050 | 1958 |
| SB I-29 over Over Up Rr | Fair | 141.1 ft | 7,750 | 1967 |
| NB I-29 over Allen Creek | Fair | 160.1 ft | 7,750 | 1967 |
| SB I-29 over Allen Creek | Fair | 161.1 ft | 7,750 | 1967 |
| NB I-29 over Up Rr & K-45 | Fair | 455.1 ft | 7,600 | 1967 |
| SB I-29 over Up Rr & K-45 | Fair | 455.1 ft | 7,600 | 1967 |
| NB I-29 over Old Soldier River Ditch | Fair | 102.0 ft | 7,600 | 1967 |
| SB I-29 over Old Soldier River Ditch | Fair | 102.0 ft | 7,600 | 1967 |
| NB I-29 over Burcham Creek | Fair | 117.1 ft | 7,600 | 1967 |
| SB I-29 over Burcham Creek | Fair | 117.1 ft | 7,600 | 1967 |
| NB I-29 over Burcham Creek | Fair | 91.9 ft | 7,600 | 1967 |
| SB I-29 over Burcham Creek | Fair | 91.9 ft | 7,600 | 1967 |
| I 29 NB over US 30 | Fair | 222.1 ft | 7,500 | 1967 |
| NB I-29 over Drainage Ditch | Fair | 91.9 ft | 7,300 | 1967 |
| SB I-29 over Drainage Ditch | Fair | 91.9 ft | 7,300 | 1967 |
| NB I-29 over Soldier River | Fair | 306.1 ft | 7,300 | 1967 |
| SB I-29 over Soldier River | Fair | 306.1 ft | 7,300 | 1967 |
| NB I-29 over Little Sioux River | Fair | 587.9 ft | 7,250 | 1967 |
| SB I-29 over Little Sioux River | Fair | 587.9 ft | 7,250 | 1967 |
| NB I-29 over Drainage Ditch | Fair | 315.9 ft | 7,250 | 1966 |
| SB I-29 over Drainage Ditch | Fair | 315.9 ft | 7,250 | 1966 |
| US 30 over Stream | Fair | 43.0 ft | 6,800 | 1919 |
| US 30 over Hog Creek | Fair | 112.9 ft | 6,800 | 1983 |
| US 30 over Allen Creek | Fair | 73.2 ft | 6,500 | 1929 |
| SB I-29 over US 30 | Fair | 222.1 ft | 6,450 | 1967 |
| US 30 over Boyer Rvr & Cc Rr & Road | Fair | 782.2 ft | 5,900 | 1973 |
| US 30 over Six Mile Creek | Fair | 167.0 ft | 4,490 | 1988 |
| US 30 over Stream | Fair | 41.0 ft | 4,490 | 1919 |
| US 30 over Missouri River | Fair | 1982.9 ft | 4,410 | 1991 |
| US 30 over Youngs Ditch | Fair | 195.9 ft | 4,410 | 1953 |
| US 30 over Drainage Ditch | Fair | 28.9 ft | 3,090 | 1983 |
| US 30 over Powley Drain Ditch | Fair | 73.2 ft | 3,090 | 1983 |
| US 30 over Stream | Fair | 125.7 ft | 3,090 | 2012 |
| US 30 over Boyer River | Fair | 285.1 ft | 3,090 | 1968 |
| L20 Loess Hills over Small Natural Stream | Fair | 21.0 ft | 1,534 | 1926 |
| L20 Loess Hills over Small Natural Stream | Fair | 21.0 ft | 1,451 | 1927 |
| Ia 37 over Boyer River | Fair | 284.1 ft | 1,340 | 1958 |
| Ia 127 over Willow Creek | Fair | 271.0 ft | 1,230 | 1991 |
| Bus Brown DR over Unnamed Creek | Fair | 31.5 ft | 1,225 | 2015 |
| L20 Loess Hills over Drainage Ditch | Fair | 73.2 ft | 1,065 | 1976 |
| L20 Loess Hills over Boyer River | Fair | 294.0 ft | 1,065 | 1991 |
| Ia 127 & 183 over Steer Creek | Fair | 133.9 ft | 920 | 1968 |
| Huron ST over Willow River | Fair | 132.9 ft | 810 | 1996 |
| Ia 44 over Six Mile Creek | Fair | 30.8 ft | 800 | 1978 |
| Ia 44 over Branch Six Mile Creek | Fair | 24.9 ft | 800 | 1978 |
| Ia 44 over Branch Six Mile Creek | Fair | 23.0 ft | 800 | 1978 |
| Ia 44 over Spring Creek | Fair | 28.9 ft | 800 | 1978 |
| FM Overton AVE over Harris Grove Creek | Fair | 44.9 ft | 788 | 1963 |
| FM 335th ST over Boyer River | Fair | 252.0 ft | 788 | 1959 |
| L20 Loess Hills over Natural Creek | Fair | 21.0 ft | 767 | 1926 |
| L20 Loess Hills over Bellville Ditch | Fair | 24.9 ft | 767 | 1926 |
| Ia 127 over I-29 | Fair | 217.8 ft | 700 | 1967 |
| F 50 over I-29 | Fair | 327.1 ft | 608 | 1967 |
| 296th ST over Boyer River | Fair | 253.0 ft | 577 | 1974 |
| Austin AVE over Old Soldier Ditch | Fair | 24.0 ft | 568 | 1984 |
| FM & 194th ST over S Picayune Creek | Fair | 24.9 ft | 518 | 1979 |
| Fm/austin AVE over Soldier River | Fair | 223.1 ft | 497 | 1957 |
| Ia 127 over Little Bloomer Creek | Fair | 24.0 ft | 460 | 1940 |
| F20l Easton Trail over Willow Creek | Fair | 216.9 ft | 437 | 2020 |
| 260th ST over Hog Creek | Fair | 28.9 ft | 417 | 1950 |
| 260th ST over Willow Creek | Fair | 230.0 ft | 417 | 1966 |
| FM & 296th ST over Harris Grove Creek | Fair | 28.9 ft | 379 | 1900 |
| FM 270th ST over Willow Creek | Fair | 128.0 ft | 379 | 1990 |
| SR F20 over I-29 | Fair | 219.2 ft | 319 | 1966 |
| FM 296th ST over Pigeon Creek | Fair | 182.1 ft | 270 | 1962 |
| Loc Munice AVE over Small Creek | Fair | 42.0 ft | 240 | 1956 |
| FM 110 ST over Boyer River | Fair | 226.0 ft | 199 | 1984 |
| 305th ST over Allen Creek | Fair | 65.9 ft | 139 | 1974 |
| FM Toledo AVE over Mill Creek | Fair | 128.0 ft | 139 | 1977 |
| FM & Panora AVE over Willow River | Fair | 69.9 ft | 100 | 1972 |
| FM & 194th ST over Willow River | Fair | 83.0 ft | 100 | 1968 |
| 242 Trail over Hog Creek | Fair | 21.0 ft | 71 | 1900 |
| Loc Sawyer Tr over Picayune Creek | Fair | 154.9 ft | 71 | 1977 |
| FM & Racine Trl over Small Creek | Fair | 21.0 ft | 71 | 1947 |
| Seward AVE over Pigeon Creek | Fair | 83.0 ft | 60 | 1979 |
| FM & Toledo AVE over Picayune Creek | Fair | 90.9 ft | 60 | 1977 |
| FM Gordon AVE over Soldier River | Fair | 254.9 ft | 60 | 1974 |
| Waldorf Avenue over Creek | Fair | 24.9 ft | 60 | 1950 |
| FM - 335th ST over Keg Creek | Fair | 68.9 ft | 50 | 1955 |
| Redwood AVE over Six Mile Creek | Fair | 21.0 ft | 45 | 1992 |
| FM - 335th ST over Small Stream | Fair | 54.1 ft | 40 | 1952 |
| Malden Trail over Allen Creek | Fair | 82.0 ft | 40 | 1940 |
| Hillside AVE over Steer Creek | Fair | 57.1 ft | 40 | 1963 |
| FM & Quay AVE over Small Stream | Fair | 23.0 ft | 40 | 1948 |
| 192 ST over I-29 | Fair | 219.2 ft | 34 | 1967 |
| FM - 305th ST over Mosquito Creek | Fair | 83.0 ft | 34 | 1978 |
| Yale AVE over Keg Creek | Fair | 82.0 ft | 29 | 1940 |
| 330th ST over Potato Creek | Fair | 24.0 ft | 29 | 1980 |
| Local Vienna Av over Spring Creek | Fair | 24.9 ft | 29 | 1960 |
| Niles Trail over Harris Grove Creek | Fair | 33.1 ft | 29 | 1975 |
| Loc 180th ST over S Picayune Creek | Fair | 26.9 ft | 29 | 2009 |
| 210th Trail over Spooner Ditch | Fair | 30.8 ft | 29 | 1959 |
| Loc Tracey AVE over N Picayune Creek | Fair | 116.1 ft | 29 | 2003 |
| FM & 110th ST over Willow River | Fair | 167.0 ft | 29 | 1918 |
| Kendrick AVE over Allen Creek | Fair | 33.8 ft | 29 | 2010 |
| 280th Street over I-29 | Fair | 254.9 ft | 26 | 1967 |
| FM & 220th ST over Pigeon Creek | Fair | 59.1 ft | 26 | 1952 |
| Ruby Trail over Six Mile Creek | Fair | 103.0 ft | 26 | 1945 |
| FM 110th ST over Straw Creek | Fair | 25.9 ft | 26 | 1900 |
| 235th ST over Allen Creek | Fair | 81.0 ft | 25 | 2015 |
| Yates AVE over Small Stream | Fair | 43.0 ft | 20 | 1960 |
| FM & 270th ST over Pigeon Creek | Fair | 127.0 ft | 20 | 1951 |
| 270th ST over Spring Creek | Fair | 44.0 ft | 20 | 1951 |
| 288th Street over Patato Creek | Fair | 26.9 ft | 15 | 1995 |
| 235th ST over Spooner Ditch | Fair | 33.1 ft | 15 | 1962 |
| FM & 170th ST over E.picayune Creek | Fair | 102.0 ft | 15 | 1978 |
| FM 130th ST over Allen Creek | Fair | 65.9 ft | 15 | 1950 |
| 140th ST over Allen Creek | Fair | 64.0 ft | 15 | 1973 |
| 220th ST over Allen Creek | Fair | 61.0 ft | 11 | 1940 |
| 220th ST over Spooner Ditch | Fair | 25.9 ft | 11 | 1970 |
| Loc-spokane AVE over Picayune Creek | Fair | 125.0 ft | 11 | 1979 |
| 170th Lane over Allen Creek | Fair | 33.1 ft | 11 | 1969 |
| Quebec Place over Willow River | Fair | 155.8 ft | 11 | 1975 |
| 193rd Lane over Steer Creek | Fair | 31.2 ft | 10 | 1971 |
| 184th Lane over Steer Creek | Fair | 30.8 ft | 10 | 1969 |
| Norwood AVE over Honey Creek | Fair | 91.9 ft | 5 | 1900 |
| Osage Trail over Willow River | Fair | 190.9 ft | 5 | 1977 |
| FM Newark AVE over Allen Creek | Fair | 26.9 ft | 5 | 1960 |
| US 30 over Uprr | Good | 243.1 ft | 10,300 | 1998 |
| NB I-29 over Over Up Rr | Good | 141.1 ft | 7,000 | 1967 |
| US 30 over Natural Creek | Good | 40.0 ft | 4,790 | 1929 |
| US 30 over Old Channel Boyer River | Good | 73.2 ft | 4,490 | 1983 |
| US 30 over Boyer River | Good | 282.8 ft | 4,430 | 2016 |
| US 30 over Wilson Ditch | Good | 22.6 ft | 4,410 | 2023 |
| US 30 over Stream | Good | 72.5 ft | 3,090 | 2023 |
| US 30 over Mill Creek | Good | 121.1 ft | 3,090 | 2019 |
| US 30 over Stream | Good | 25.6 ft | 3,090 | 1924 |
| Ia 191 over Spring Creek | Good | 140.7 ft | 1,650 | 2014 |
| L20 Loess Hills over Willow Creek | Good | 405.8 ft | 1,414 | 1993 |
| Bus Brown DR over Drainage | Good | 31.5 ft | 1,225 | 2017 |
| Ia 127 over Spooner Ditch | Good | 21.0 ft | 1,180 | 1990 |
| L20 Loess Hills over Drainage Ditch | Good | 74.1 ft | 1,065 | 1991 |
| Ia 183 over Ditch | Good | 24.9 ft | 870 | 2002 |
| Ia 183 over Natural Creek | Good | 24.9 ft | 870 | 1996 |
| Ia 44 over Branch Six Mile Creek | Good | 21.0 ft | 800 | 1978 |
| Ia 44 over Pigeon Creek | Good | 201.1 ft | 800 | 1978 |
| L20 Loess Hills over Allen Creek | Good | 150.9 ft | 767 | 1990 |
| Ia 183 over Cobb Creek | Good | 150.9 ft | 730 | 2017 |
| Ia 183 over Soldier River | Good | 267.1 ft | 580 | 2014 |
| Ia 183 over Drainage Ditch | Good | 24.9 ft | 580 | 2008 |
| Ia 127 over Allen Creek | Good | 184.1 ft | 460 | 1968 |
| FM & Austin AVE over Little Sioux River | Good | 291.0 ft | 396 | 1987 |
| FM & Austin AVE over Monona-harrison Ditch | Good | 216.9 ft | 396 | 2004 |
| F50 270th ST over Allen Creek | Good | 92.8 ft | 379 | 2021 |
| Easton Trail over Elk Creek | Good | 26.9 ft | 335 | 2008 |
| Jackson ST over Soldier River | Good | 216.9 ft | 313 | 2004 |
| 296th ST over Potato Creek | Good | 23.0 ft | 270 | 2007 |
| Local RD over I-29 | Good | 227.0 ft | 139 | 1966 |
| Racine Trail over Small Stream | Good | 26.9 ft | 139 | 2009 |
| F58 296th ST over Mosquito Creek | Good | 179.5 ft | 121 | 2016 |
| Fm-335th ST over Potato Creek | Good | 179.1 ft | 100 | 1993 |
| 235th ST over I-29 | Good | 229.0 ft | 79 | 1967 |
| Fm-335th ST over Pigeon Creek | Good | 142.1 ft | 79 | 1991 |
| 180th ST over Picayune Creek | Good | 128.0 ft | 79 | 1981 |
| 180th Street over Boyer River | Good | 246.1 ft | 79 | 2002 |
| Laredo AVE over Stowe Creek | Good | 60.0 ft | 71 | 2022 |
| 280th ST over Willow River | Good | 109.9 ft | 60 | 2021 |
| 242 Trail over Willow Creek | Good | 167.0 ft | 60 | 1986 |
| Fm-toledo AVE over East Picayune Creek | Good | 116.1 ft | 60 | 1977 |
| E Kelly AVE over Soldier River | Good | 204.4 ft | 60 | 2013 |
| FM & 340th ST over Willow River | Good | 179.1 ft | 50 | 2005 |
| FM Geneva Place over Soldier River | Good | 204.1 ft | 50 | 1980 |
| 106th Trail over I-29 | Good | 219.2 ft | 45 | 1966 |
| Spencer AVE over Pigeon Creek | Good | 216.9 ft | 45 | 2008 |
| 280th Street over Allen Creek | Good | 80.1 ft | 45 | 2020 |
| Spokane AVE over Mill Creek | Good | 128.9 ft | 45 | 2003 |
| Parker Trail over Boyer River | Good | 229.3 ft | 40 | 2023 |
| 155th ST over Boyer River | Good | 243.1 ft | 40 | 2018 |
| 160th ST over I-29 | Good | 228.0 ft | 34 | 1967 |
| Harvard Trail over Allen Creek | Good | 24.0 ft | 34 | 2008 |
| F32 194th ST over Allen Creek | Good | 27.9 ft | 34 | 2023 |
| 235th Trail over Willow Creek | Good | 190.9 ft | 29 | 2006 |
| Fm/canton AVE over Soldier River | Good | 254.9 ft | 29 | 1974 |
| Loc Vienna AVE over Picayune Creek | Good | 141.1 ft | 26 | 2006 |
| 315th ST over Keg Creek | Good | 128.0 ft | 20 | 1999 |
| Quincy Trail over Boyer River | Good | 246.1 ft | 15 | 1994 |
| Madrid AVE over Stowe Creek | Good | 25.9 ft | 15 | 2023 |
| Loc Tama Trail over S Picayune Creek | Good | 26.9 ft | 5 | 1998 |
| Tama Trail over S Picayune Creek | Good | 29.9 ft | 5 | 2023 |