| US 75 over Stream | Poor | 34.1 ft | 14,000 | 1926 |
| FM over Stephens Creek | Poor | 102.0 ft | 628 | 1960 |
| FM K-42 over Carter Creek | Poor | 42.0 ft | 190 | 1941 |
| FM K-42 over Carter Creek | Poor | 55.1 ft | 190 | 1966 |
| FM C-43 over Broken Kettle Creek | Poor | 149.9 ft | 159 | 1960 |
| 150th ST over Floyd River | Poor | 174.9 ft | 131 | 1954 |
| 165th ST over West Branch Floyd River | Poor | 73.2 ft | 120 | 1911 |
| Lone Tree RD over Perry Creek | Poor | 149.9 ft | 71 | 1953 |
| 160th ST over Deep Creek | Poor | 38.1 ft | 71 | 1900 |
| 200th ST over W.branch Floyd River | Poor | 163.1 ft | 71 | 1960 |
| Tamarack AVE over Drainage Ditch | Poor | 35.1 ft | 60 | 1948 |
| 330th ST over Creek | Poor | 29.9 ft | 60 | 1956 |
| Polk AVE over Deep Creek | Poor | 120.1 ft | 60 | 1958 |
| Local over Willow Creek | Poor | 23.0 ft | 60 | 1941 |
| Quartz AVE over Willow Creek | Poor | 53.1 ft | 60 | 1946 |
| 140th ST over Floyd River | Poor | 194.9 ft | 60 | 1954 |
| Lynx AVE over Big Whiskey Creek | Poor | 41.0 ft | 50 | 1958 |
| 300th ST over Mud Creek | Poor | 44.9 ft | 50 | 1950 |
| 190th ST over Bull Run | Poor | 43.0 ft | 50 | 1961 |
| Shamrock AVE over Deep Creek | Poor | 94.2 ft | 50 | 1953 |
| Juniper AVE over Mink Creek | Poor | 29.9 ft | 45 | 1900 |
| Lynx AVE over Muddy Creek | Poor | 44.9 ft | 34 | 1949 |
| 260th ST over Dry Branch | Poor | 38.1 ft | 34 | 1956 |
| 170th ST over Drainage | Poor | 24.9 ft | 34 | 1900 |
| 200th ST over Mink Creek | Poor | 60.0 ft | 34 | 1949 |
| 200th ST over Mink Creek | Poor | 102.0 ft | 34 | 1953 |
| Juniper AVE over Mink Creek | Poor | 29.9 ft | 34 | 1948 |
| Iris AVE over Mink Creek | Poor | 38.1 ft | 34 | 1900 |
| Granite AVE over Broken Kettle Creek | Poor | 49.9 ft | 34 | 1900 |
| 310th ST over Creek | Poor | 22.0 ft | 30 | 1900 |
| 320th ST over Creek | Poor | 48.9 ft | 30 | 1900 |
| Local over Drainage | Poor | 25.9 ft | 30 | 1955 |
| 230th ST over Rathburn Creek | Poor | 38.1 ft | 30 | 1900 |
| Pioneer AVE over Deep Creek | Poor | 33.1 ft | 30 | 1917 |
| Fir AVE over Broken Kettle Creek | Poor | 48.9 ft | 30 | 1900 |
| Fawn AVE over Drainage | Poor | 33.1 ft | 30 | 1900 |
| Fir AVE over Bull Run | Poor | 89.9 ft | 30 | 1948 |
| 200th ST over Drainage | Poor | 29.9 ft | 30 | 1959 |
| 140th ST over Drainage | Poor | 24.9 ft | 30 | 1961 |
| Noble AVE over Deep Creek | Poor | 126.0 ft | 30 | 1953 |
| 280th ST over Mud Creek | Poor | 38.1 ft | 26 | 1900 |
| 300th ST over Johns Creek | Poor | 80.1 ft | 26 | 1900 |
| 310th ST over Dry Branch | Poor | 42.0 ft | 26 | 1941 |
| Quest AVE over Rathburn Creek | Poor | 38.1 ft | 26 | 1950 |
| Lynx AVE over Plymouth Creek | Poor | 60.0 ft | 26 | 1960 |
| 220th ST over Drainage | Poor | 33.1 ft | 26 | 1958 |
| Impala AVE over Mink Creek | Poor | 28.9 ft | 26 | 1938 |
| 190th ST over Westfield Creek | Poor | 126.0 ft | 26 | 1951 |
| 150th ST over Broken Kettle Creek | Poor | 24.0 ft | 26 | 1952 |
| Diamond AVE over Beaver Creek | Poor | 68.9 ft | 26 | 1900 |
| 280th ST over Perry Creek | Poor | 60.0 ft | 20 | 1900 |
| Sunset AVE over Dd | Poor | 30.8 ft | 20 | 1956 |
| 190th ST over Drainage | Poor | 30.8 ft | 20 | 1949 |
| 180th ST over Westfield Creek | Poor | 37.1 ft | 20 | 1948 |
| Bluebird AVE over Drainage | Poor | 45.9 ft | 20 | 1949 |
| 120th ST over W Br Floyd River | Poor | 143.0 ft | 20 | 1941 |
| 130th ST over W Br Floyd River | Poor | 91.9 ft | 20 | 1900 |
| 130th ST over Drainage | Poor | 42.0 ft | 20 | 1961 |
| Evergreen AVE over Indian Creek | Poor | 44.9 ft | 20 | 1900 |
| Granite AVE over Broken Kettle Creek | Poor | 24.9 ft | 20 | 1959 |
| 140th ST over Broken Kettle Creek | Poor | 29.9 ft | 20 | 1948 |
| 140th ST over Indian Creek | Poor | 38.1 ft | 20 | 1956 |
| 120th ST over Indian Creek | Poor | 29.9 ft | 20 | 1900 |
| Roosevelt AVE over W F Little Sioux | Poor | 129.9 ft | 15 | 1900 |
| Roosevelt AVE over Dd | Poor | 29.9 ft | 15 | 1900 |
| Ritchie RD over Mud Creek | Poor | 44.9 ft | 15 | 1948 |
| 190th ST over Mink Creek | Poor | 95.1 ft | 15 | 1947 |
| Otter AVE over Willow Creek | Poor | 95.1 ft | 15 | 1949 |
| 120th ST over Indian Creek | Poor | 42.0 ft | 15 | 1900 |
| 235th ST over Broken Kettle Ck | Poor | 32.2 ft | 15 | 1900 |
| 300th ST over Creek | Poor | 29.9 ft | 11 | 1956 |
| 280th ST over Dry Branch | Poor | 38.1 ft | 11 | 1900 |
| 320th ST over Mud Creek | Poor | 44.9 ft | 11 | 1900 |
| 320th ST over Big Whiskey Creek | Poor | 33.1 ft | 11 | 1900 |
| 240th ST over Big Whiskey Slough | Poor | 76.1 ft | 11 | 1953 |
| 260th ST over Johns Creek | Poor | 57.1 ft | 11 | 1900 |
| 260th over Johns Creek | Poor | 60.0 ft | 11 | 1966 |
| 270th ST over Carter Creek | Poor | 38.1 ft | 11 | 1900 |
| Fawn AVE over Broken Kettle Creek | Poor | 34.1 ft | 11 | 1953 |
| Evergreen AVE over Drainage | Poor | 22.0 ft | 11 | 1900 |
| Diamond AVE over Westfield Creek | Poor | 28.9 ft | 11 | 1900 |
| Concord AVE over Unnamed Creek | Poor | 80.1 ft | 11 | 1949 |
| Local over Deep Creek | Poor | 42.0 ft | 11 | 1941 |
| 150th ST over Broken Kettle Creek | Poor | 43.0 ft | 11 | 1952 |
| 240th ST over Mud Creek | Poor | 38.1 ft | 5 | 1956 |
| 240th ST over Perry Creek | Poor | 49.9 ft | 5 | 1900 |
| Granite AVE over Perry Creek | Poor | 37.1 ft | 5 | 1952 |
| 200th ST over Clear Creek | Poor | 33.1 ft | 5 | 1946 |
| Marble Ave. over Plymouth Creek | Poor | 76.1 ft | 5 | 1946 |
| Evergreen AVE over Indian Creek | Poor | 79.1 ft | 5 | 1961 |
| US 75 over Stream | Fair | 26.9 ft | 18,200 | 1999 |
| US 75 over W Fk Floyd River | Fair | 243.1 ft | 10,400 | 1956 |
| 200th Street over Floyd River | Fair | 1001.0 ft | 8,224 | 2007 |
| SB US 75 over Stream | Fair | 27.9 ft | 7,500 | 1948 |
| NB US 75 over Stream | Fair | 25.9 ft | 7,450 | 1926 |
| NB US 75 over Stream | Fair | 24.9 ft | 7,000 | 1950 |
| SB US 75 over Stream | Fair | 27.9 ft | 7,000 | 1948 |
| SB US 75 over Dry Creek | Fair | 27.9 ft | 7,000 | 1948 |
| SB US 75 over Dry Creek | Fair | 27.9 ft | 7,000 | 1948 |
| NB US 75 over Drainage Ditch | Fair | 34.1 ft | 7,000 | 1972 |
| SB US 75 over Drainage Ditch | Fair | 38.1 ft | 7,000 | 1948 |
| SB US 75 over Dry Creek | Fair | 43.0 ft | 7,000 | 1948 |
| SB US 75 over Drainage Ditch | Fair | 39.0 ft | 7,000 | 1948 |
| SB US 75 over Dry Creek | Fair | 27.9 ft | 7,000 | 1948 |
| SB US 75 over Flat Creek | Fair | 27.9 ft | 7,000 | 1948 |
| Ia 3 over Floyd River | Fair | 348.1 ft | 4,270 | 1981 |
| Ia 3 over Stream | Fair | 28.9 ft | 3,820 | 1994 |
| Ia 60 NB over Stream | Fair | 26.9 ft | 3,200 | 1932 |
| Ia 404 NB over Floyd River | Fair | 295.9 ft | 2,400 | 1972 |
| Ia 404 SB over Floyd River | Fair | 353.0 ft | 2,400 | 1957 |
| FM over Perry Creek | Fair | 149.9 ft | 2,134 | 1970 |
| Ia 12 over Drainage Ditch | Fair | 28.9 ft | 1,940 | 1957 |
| Ia 12 over Drainage Ditch | Fair | 28.9 ft | 1,940 | 1957 |
| Ia 12 over Broken Kettle Creek | Fair | 151.9 ft | 1,940 | 1956 |
| FM C-38 over Drainage | Fair | 100.1 ft | 1,615 | 1977 |
| Ia 3 over Big Sioux Overflow | Fair | 102.0 ft | 1,570 | 1962 |
| Ia 3 over Big Sioux Overflow | Fair | 102.0 ft | 1,570 | 1962 |
| Ia 3 over Westfield Creek | Fair | 154.9 ft | 1,570 | 1962 |
| FM over Minnie Creek | Fair | 25.9 ft | 1,446 | 1975 |
| Ia 3 over Stream | Fair | 127.0 ft | 1,420 | 1954 |
| Ia 3 over Mink Creek | Fair | 128.0 ft | 1,420 | 1954 |
| Ia 140 over W Fk Little Sioux River | Fair | 178.1 ft | 1,390 | 1964 |
| Ia 12 over Drainage Ditch | Fair | 24.9 ft | 1,250 | 1957 |
| Ia 12 over Drainage Ditch | Fair | 24.9 ft | 1,250 | 1957 |
| FM K-49 over Plymouth CR | Fair | 125.0 ft | 1,236 | 1974 |
| FM over Johns Creek | Fair | 125.0 ft | 1,157 | 1976 |
| Ia 12 over Beaver Creek | Fair | 133.9 ft | 1,130 | 1975 |
| Ia 140 over Clear Creek | Fair | 32.2 ft | 1,130 | 1964 |
| Big Sioux River RD over Big Sioux River | Fair | 489.8 ft | 1,121 | 1996 |
| FM over Perry Creek | Fair | 158.1 ft | 1,028 | 1949 |
| FM over Perry Creek | Fair | 125.0 ft | 1,028 | 1970 |
| Ia 140 over Drainage | Fair | 22.0 ft | 970 | 1963 |
| Ia 140 over Rathburn Creek | Fair | 75.1 ft | 970 | 1964 |
| Ia 3 over Broken Kettle Creek | Fair | 103.0 ft | 940 | 1975 |
| FM over Creek | Fair | 33.1 ft | 848 | 1976 |
| FM over Bull Run Creek | Fair | 178.1 ft | 838 | 1960 |
| FM K-49 over Whiskey Creek | Fair | 100.1 ft | 818 | 1974 |
| FM over Willow Creek | Fair | 128.0 ft | 748 | 1968 |
| FM over Small | Fair | 75.1 ft | 688 | 1978 |
| FM over Drainage | Fair | 22.0 ft | 669 | 1960 |
| FM over Small | Fair | 102.0 ft | 628 | 1900 |
| FM K-42 over Mink Creek | Fair | 149.9 ft | 628 | 1961 |
| FM over Mink Creek | Fair | 128.0 ft | 628 | 1961 |
| FM over Mink Creek | Fair | 125.0 ft | 628 | 1961 |
| FM over Mink Creek | Fair | 149.9 ft | 628 | 1961 |
| FM over Big Sioux River | Fair | 446.9 ft | 589 | 1967 |
| FM over Willow Creek | Fair | 128.0 ft | 589 | 1967 |
| FM over Mink Creek | Fair | 103.0 ft | 559 | 1961 |
| FM over Mink Creek | Fair | 21.7 ft | 559 | 1961 |
| Local over Deep Creek | Fair | 125.0 ft | 510 | 1953 |
| FM K-49 over Muddy Creek | Fair | 75.1 ft | 509 | 1974 |
| FM K-18 over Broken Kettle Creek | Fair | 203.1 ft | 490 | 1979 |
| FM C-70 over West Fork Little Sioux | Fair | 174.9 ft | 459 | 1961 |
| FM K-18 over Stream | Fair | 23.0 ft | 429 | 1979 |
| FM C-16 over Deep Creek | Fair | 102.0 ft | 409 | 1960 |
| Local over Clear Creek | Fair | 42.0 ft | 399 | 1959 |
| Local over Willow Creek | Fair | 43.0 ft | 319 | 1967 |
| FM C-60 over West Fork Little Sioux | Fair | 202.1 ft | 290 | 1963 |
| FM over W Br Floyd River | Fair | 149.9 ft | 270 | 1968 |
| FM over Johns Creek | Fair | 127.0 ft | 259 | 1971 |
| FM over Indian Creek | Fair | 125.0 ft | 219 | 1971 |
| FM C-44 over Small | Fair | 36.1 ft | 190 | 1978 |
| FM over Drainage | Fair | 42.0 ft | 190 | 1966 |
| FM over Drainage | Fair | 21.0 ft | 190 | 1966 |
| FM over Mink Creek | Fair | 100.1 ft | 190 | 1967 |
| FM over Perry Creek | Fair | 32.2 ft | 159 | 1940 |
| FM over Drainage Ditch | Fair | 38.1 ft | 139 | 1932 |
| FM over Drainage Ditch | Fair | 24.0 ft | 139 | 1933 |
| L-22 over Little Sioux River | Fair | 100.1 ft | 139 | 1974 |
| FM C-44 over Broken Kettle Creek | Fair | 149.9 ft | 120 | 1965 |
| FM K-64 over Drainage | Fair | 115.2 ft | 110 | 1973 |
| Nature AVE over Plymouth Creek | Fair | 45.9 ft | 100 | 1900 |
| 240th ST over Dry Branch | Fair | 29.9 ft | 71 | 1956 |
| 170th ST over Mink Creek | Fair | 149.9 ft | 60 | 1934 |
| 110th ST over Floyd River | Fair | 149.9 ft | 60 | 1940 |
| Jade AVE over Drainage | Fair | 60.0 ft | 50 | 1989 |
| Nature AVE over Plymouth Creek | Fair | 50.9 ft | 45 | 1940 |
| Quorn RD over West Fork Little Sioux | Fair | 174.9 ft | 40 | 1965 |
| 300th ST over Deer Creek | Fair | 100.1 ft | 30 | 1990 |
| Sunset AVE over Dd | Fair | 40.0 ft | 30 | 1950 |
| Pioneer AVE over Drainage | Fair | 25.9 ft | 30 | 1991 |
| Local over West Fork Little Sioux | Fair | 174.9 ft | 26 | 1963 |
| Fir AVE over Bull Run | Fair | 89.9 ft | 26 | 1949 |
| 150th ST over Mink Creek | Fair | 125.0 ft | 26 | 1961 |
| Juniper AVE over Drainage | Fair | 30.8 ft | 20 | 1900 |
| 160th ST over Broken Kettle Creek | Fair | 125.0 ft | 20 | 1964 |
| 200th ST over Broken Kettle Creek | Fair | 77.1 ft | 20 | 1972 |
| Sunset AVE over Dd | Fair | 29.9 ft | 15 | 1956 |
| 220th ST over Drainage | Fair | 24.9 ft | 15 | 1900 |
| 250th ST over Drainage | Fair | 29.9 ft | 15 | 1978 |
| 200th ST over Big Whiskey Slough | Fair | 79.1 ft | 15 | 1987 |
| 190th ST over Westfield Creek | Fair | 125.0 ft | 15 | 1962 |
| 280th ST over Deer Creek | Fair | 40.0 ft | 11 | 1956 |
| 180th ST over Westfield Creek | Fair | 50.9 ft | 11 | 1900 |
| Dogwood AVE over Indian Creek | Fair | 83.0 ft | 11 | 1984 |
| Mallard AVE over Small Natural Stream | Fair | 59.1 ft | 5 | 1974 |
| Omega AVE over Creek | Fair | 40.0 ft | 5 | 1900 |
| US 75 over Stream | Good | 24.9 ft | 14,900 | 2019 |
| US 75 over Stream | Good | 24.9 ft | 14,900 | 2019 |
| US 75 over Stream | Good | 24.9 ft | 14,900 | 2019 |
| US 75 over Stream | Good | 24.9 ft | 14,900 | 2019 |
| US 75 over Dry Creek | Good | 25.9 ft | 14,000 | 2023 |
| US 75 over Dry Creek | Good | 24.9 ft | 14,000 | 2023 |
| US 75 over Dry Creek | Good | 25.9 ft | 14,000 | 2023 |
| US 75 over Drainage Ditch | Good | 38.1 ft | 14,000 | 2023 |
| US 75 over Dry Creek | Good | 24.9 ft | 14,000 | 1972 |
| US 75 over Flat Creek | Good | 24.9 ft | 14,000 | 2023 |
| SB US 75 over Stream | Good | 70.9 ft | 7,500 | 2020 |
| US 75 SB over Stream | Good | 100.7 ft | 7,500 | 2020 |
| NB US 75 over Stream | Good | 25.9 ft | 7,450 | 1926 |
| NB US 75 over Stream | Good | 70.9 ft | 7,450 | 2019 |
| Ia 60 over Drainage Ditch | Good | 21.0 ft | 6,900 | 2003 |
| Ia 60 over Wolf Creek | Good | 39.0 ft | 6,200 | 2004 |
| 200th Street over Ia 75 | Good | 234.9 ft | 4,973 | 2006 |
| Ia 3 over Stream | Good | 27.9 ft | 3,820 | 1994 |
| Iowa 3 over US 75 (lemars Bypass) | Good | 245.1 ft | 3,660 | 2005 |
| Ia 60 SB over Stream | Good | 32.8 ft | 3,200 | 2004 |
| US 75 NB over Lake Avenue | Good | 232.0 ft | 3,000 | 2006 |
| US 75 SB over Lake Avenue | Good | 232.0 ft | 3,000 | 2006 |
| Ia 3 & 12 over Drainage Ditch | Good | 25.9 ft | 2,340 | 1976 |
| Ia 3 & 12 over Westfield Creek | Good | 170.9 ft | 2,270 | 1976 |
| Ia 3 over Big Whiskey Slough | Good | 39.4 ft | 2,140 | 1999 |
| Ia 3 over W Fork Of Floyd River | Good | 255.9 ft | 2,070 | 2004 |
| US 75 NB over Ia 60 | Good | 233.9 ft | 2,070 | 2005 |
| US 75 SB over Ia 60 | Good | 233.9 ft | 2,070 | 2005 |
| Ia 140 over Stream | Good | 128.9 ft | 1,990 | 1976 |
| FM C-60 over Floyd River | Good | 243.1 ft | 1,586 | 1985 |
| Ia 3 over Big Sioux River | Good | 505.9 ft | 1,570 | 2010 |
| FM over Floyd River | Good | 288.1 ft | 1,566 | 2007 |
| FM C-70 over Floyd River | Good | 299.9 ft | 1,487 | 1990 |
| Ia 3 over Drainage Ditch | Good | 25.9 ft | 1,420 | 2020 |
| C 38 over Mink Creek | Good | 152.9 ft | 1,347 | 2012 |
| C-38 over W Br Floyd River | Good | 204.4 ft | 1,347 | 2012 |
| Access Road over Stream | Good | 24.9 ft | 1,347 | 2000 |
| FM C-38 over Plymouth Creek | Good | 125.0 ft | 1,267 | 1977 |
| Ia 12 over Indian Creek | Good | 217.2 ft | 1,130 | 2021 |
| FM K-49 over Drainage | Good | 21.0 ft | 1,017 | 1975 |
| Ia 140 over Drainage | Good | 24.9 ft | 970 | 2008 |
| C38 over Perry Creek | Good | 24.0 ft | 948 | 2017 |
| Ia 3 over Westfield Creek | Good | 24.9 ft | 940 | 1975 |
| Ia 3 over Stream | Good | 24.0 ft | 940 | 1975 |
| FM K-64 over Deep Creek | Good | 167.0 ft | 938 | 1982 |
| FM C-60 over Perry Creek | Good | 128.0 ft | 908 | 1984 |
| FM over Small | Good | 100.1 ft | 878 | 1978 |
| FM over Deep Creek | Good | 159.1 ft | 868 | 1981 |
| 4th Ave.e over Willow Creek | Good | 189.0 ft | 851 | 1993 |
| FM over Whiskey Creek | Good | 125.0 ft | 848 | 1997 |
| FM over Bull Run | Good | 112.9 ft | 838 | 1995 |
| FM over Plymouth Creek | Good | 24.0 ft | 789 | 1975 |
| C30 190th ST over Plymouth Creek | Good | 92.8 ft | 789 | 2020 |
| FM over Drainage | Good | 100.1 ft | 748 | 1972 |
| FM K-42 over Drainage | Good | 24.0 ft | 748 | 2008 |
| FM over W Branch Floyd River | Good | 200.1 ft | 658 | 1976 |
| FM C-60 over Minnie Brook | Good | 103.0 ft | 628 | 1979 |
| FM C-60 over Big Whiskey Creek | Good | 111.9 ft | 628 | 2006 |
| FM C-60 over Kettle Creek | Good | 100.1 ft | 628 | 1969 |
| Local over Creek | Good | 103.0 ft | 589 | 1984 |
| FM C-38 over Westfield Creek | Good | 21.0 ft | 589 | 1987 |
| FM C-70 over Big Whiskey Creek | Good | 125.0 ft | 559 | 1985 |
| FM over Muddy Creek | Good | 89.9 ft | 559 | 1985 |
| FM C-70 over Drainage Ditch | Good | 21.0 ft | 559 | 1995 |
| Marble AVE over Willow Creek | Good | 190.9 ft | 538 | 1994 |
| South Ridge RD over Perry Creek | Good | 164.0 ft | 518 | 1978 |
| FM over Broken Kettle Creek | Good | 200.1 ft | 489 | 1976 |
| 170th ST (sdb) over Drainage | Good | 28.9 ft | 469 | 2004 |
| C70 over Mud Creek | Good | 125.0 ft | 450 | 1999 |
| FM C-70 over Elliot Creek | Good | 26.9 ft | 450 | 1999 |
| FM over Big Whiskey Slough | Good | 103.0 ft | 450 | 2008 |
| FM over Small | Good | 25.9 ft | 450 | 2006 |
| FM over Small | Good | 86.9 ft | 450 | 1978 |
| FM C-60 over Dry Branch | Good | 103.0 ft | 439 | 1992 |
| C44 230th ST over Floyd River | Good | 314.0 ft | 439 | 2019 |
| FM over Deer Creek | Good | 116.1 ft | 429 | 2003 |
| FM over Mud Creek | Good | 112.9 ft | 409 | 2008 |
| FM over Drainage Ditch | Good | 25.9 ft | 390 | 1994 |
| Imperial RD over Creek | Good | 24.9 ft | 379 | 1977 |
| FM K-42 over Mink Creek | Good | 150.9 ft | 359 | 1985 |
| 190th ST over Drainage | Good | 26.2 ft | 359 | 1935 |
| FM C-44 over Minnie Brook | Good | 100.1 ft | 339 | 1977 |
| 325th ST over Perry Creek | Good | 125.0 ft | 319 | 2006 |
| FM over Indian Creek | Good | 128.0 ft | 319 | 1984 |
| C66 310th ST over Little Sioux River | Good | 204.1 ft | 309 | 2018 |
| FM over Johns Creek | Good | 174.9 ft | 309 | 1977 |
| FM C-60 over Deep Creek | Good | 112.9 ft | 290 | 1990 |
| FM over Ditch | Good | 33.1 ft | 290 | 1991 |
| FM over Small Stream | Good | 24.0 ft | 259 | 1987 |
| FM over Perry Creek | Good | 87.9 ft | 259 | 1995 |
| FM over Floyd River | Good | 191.9 ft | 249 | 2010 |
| FM over Drainage | Good | 24.9 ft | 240 | 1964 |
| E 2nd ST over Drainage | Good | 26.2 ft | 232 | 2015 |
| 322nd ST over Br Of W F Little Sioux | Good | 111.9 ft | 210 | 1998 |
| L-22 over W Fork Little Sioux Riv | Good | 21.0 ft | 210 | 1974 |
| FM over Broken Kettle Creek | Good | 92.8 ft | 199 | 2010 |
| 250th ST over Mud Creek | Good | 87.9 ft | 190 | 2000 |
| FM over Westfield Creek | Good | 128.0 ft | 180 | 1988 |
| FM K-13 over Westfield Creek | Good | 34.1 ft | 180 | 1988 |
| Fox AVE over Perry Creek | Good | 139.1 ft | 170 | 1983 |
| Lake AVE over Plymouth Creek | Good | 125.0 ft | 159 | 1977 |
| 200th ST over Small Stream | Good | 25.9 ft | 159 | 1985 |
| FM over Rathbun Creek | Good | 87.9 ft | 150 | 1986 |
| FM C-44 over Dry Branch | Good | 24.9 ft | 150 | 1998 |
| FM C-44 over Johns Creek | Good | 111.9 ft | 150 | 1985 |
| FM over Little Sioux | Good | 125.0 ft | 139 | 1991 |
| Quest AVE over West Fork Little Sioux | Good | 174.9 ft | 131 | 1967 |
| 160th ST over Floyd River | Good | 229.0 ft | 131 | 2013 |
| Otter AVE over Deep Creek | Good | 146.0 ft | 100 | 2007 |
| 280th ST over Drainage | Good | 78.1 ft | 80 | 1990 |
| 270th ST over Perry Creek | Good | 128.0 ft | 80 | 1986 |
| 270th ST over Perry Creek | Good | 67.6 ft | 80 | 2018 |
| Noble AVE over Plymouth Creek | Good | 87.9 ft | 80 | 2000 |
| Noble AVE over Plymouth Creek | Good | 112.9 ft | 80 | 2000 |
| Lake AVE over Big Whiskey Creek | Good | 100.1 ft | 71 | 2002 |
| 300th ST over Perry Creek | Good | 128.0 ft | 71 | 1991 |
| 200th ST over Drainage | Good | 45.9 ft | 71 | 2006 |
| 150th ST over Willow Creek | Good | 128.0 ft | 71 | 1992 |
| 150th ST over Wolf Creek | Good | 73.2 ft | 71 | 2016 |
| 320th ST over W Br Perry Creek | Good | 153.9 ft | 60 | 2001 |
| 270th ST over Mud Creek | Good | 87.9 ft | 60 | 1995 |
| 190th ST over Clear Creek | Good | 24.0 ft | 60 | 2018 |
| 195th Street over Floyd River | Good | 313.0 ft | 60 | 1975 |
| 150th ST over Deep Creek | Good | 128.0 ft | 60 | 2004 |
| 130th ST over Mink Creek | Good | 87.9 ft | 60 | 2002 |
| 130th ST over Mink Creek | Good | 75.1 ft | 60 | 2004 |
| Noble AVE over Mud Creek | Good | 99.1 ft | 50 | 2004 |
| Lake AVE over Minnie Brook | Good | 78.1 ft | 50 | 1998 |
| 260th ST over Mud Creek | Good | 87.9 ft | 50 | 1996 |
| Lynx Avenue over Small Stream | Good | 112.9 ft | 50 | 1987 |
| 120th ST over Mink Creek | Good | 24.9 ft | 50 | 1999 |
| 300th ST over Dry Branch | Good | 115.2 ft | 45 | 2002 |
| 270th ST over Dry Branch | Good | 87.9 ft | 45 | 1997 |
| 250th ST over Perry Creek | Good | 116.1 ft | 45 | 2003 |
| Shamrock AVE over Creek | Good | 24.9 ft | 45 | 2000 |
| 200th ST over Clear Creek | Good | 22.3 ft | 45 | 2023 |
| 120th ST over Deep Creek | Good | 123.0 ft | 45 | 2014 |
| 130th ST over Wolf Creek | Good | 63.0 ft | 45 | 2010 |
| Diamond AVE over Indian Creek | Good | 129.9 ft | 45 | 2023 |
| 300th ST over Big Whiskey Creek | Good | 120.1 ft | 40 | 2008 |
| 160th ST over Deep Creek | Good | 22.0 ft | 40 | 2015 |
| 200th ST over Small Stream | Good | 25.9 ft | 40 | 1986 |
| Key AVE over Drainage | Good | 25.9 ft | 40 | 2018 |
| 280th ST over Big Whiskey Creek | Good | 83.0 ft | 34 | 2010 |
| 310th ST over Muddy Creek | Good | 90.9 ft | 34 | 1999 |
| 240th ST over Rathburn Creek | Good | 75.1 ft | 34 | 2000 |
| Marble AVE over Whiskey Creek | Good | 78.1 ft | 34 | 2003 |
| 160th ST over Big Whiskey Slough | Good | 92.8 ft | 34 | 2015 |
| Otter AVE over Plymouth Creek | Good | 22.6 ft | 34 | 2016 |
| Juniper AVE over Drainage | Good | 33.1 ft | 34 | 2000 |
| Bluebird AVE over Local | Good | 25.9 ft | 34 | 1986 |
| 150th ST over Whiskey Creek | Good | 83.0 ft | 34 | 2011 |
| Key AVE over West Branch Floyd River | Good | 45.9 ft | 34 | 2008 |
| Fawn AVE over Indian Creek | Good | 28.9 ft | 34 | 1900 |
| 220th ST over Dd | Good | 38.1 ft | 30 | 1900 |
| 220th ST over Johns Creek | Good | 89.9 ft | 30 | 2008 |
| Quartz AVE over Clear Creek | Good | 112.9 ft | 30 | 2000 |
| Hedge AVE over Perry Creek | Good | 44.0 ft | 30 | 2014 |
| Fawn AVE over Broken Kettle Creek | Good | 123.0 ft | 30 | 2013 |
| 190th ST over Broken Kettle Creek | Good | 120.1 ft | 30 | 2018 |
| Quest AVE over Willow Creek | Good | 45.9 ft | 30 | 2004 |
| 140th ST over Deep Creek | Good | 128.0 ft | 30 | 2001 |
| Quartz AVE over Willow Creek | Good | 112.9 ft | 30 | 1997 |
| C12 110th ST over Willow Creek | Good | 123.0 ft | 30 | 2014 |
| Nature AVE over Deep Creek | Good | 140.1 ft | 30 | 2018 |
| Nature AVE over Willow Creek | Good | 129.9 ft | 30 | 2018 |
| Iris AVE over Mink Creek | Good | 92.8 ft | 30 | 2009 |
| Tamarack AVE over Little Sioux River | Good | 152.9 ft | 26 | 2017 |
| 330th ST over Creek | Good | 24.0 ft | 26 | 2002 |
| Noble AVE over Mud Creek | Good | 116.1 ft | 26 | 2002 |
| Quarry Road over W Fork Little Sioux | Good | 22.0 ft | 26 | 2022 |
| 310th ST over Muddy Creek | Good | 103.0 ft | 26 | 2017 |
| Key AVE over Big Whiskey Creek | Good | 69.9 ft | 26 | 1952 |
| Marble AVE over Elliot Creek | Good | 92.8 ft | 26 | 2020 |
| Tamarack AVE over Whiskey Creek | Good | 132.9 ft | 26 | 2009 |
| 240th ST over Clear Creek | Good | 109.9 ft | 26 | 2023 |
| 270th ST over Clear Creek | Good | 125.0 ft | 26 | 1991 |
| 270th ST over Big Whiskey Creek | Good | 80.1 ft | 26 | 2016 |
| Ideal Road over Unnamed Waterway | Good | 33.8 ft | 26 | 2021 |
| 260th ST over Creek | Good | 23.0 ft | 26 | 2002 |
| 220th ST over Perry Creek | Good | 88.9 ft | 26 | 1997 |
| Echo Road over Broken Kettle Creek | Good | 150.9 ft | 26 | 1996 |
| 190th ST over Big Whiskey Slough | Good | 100.1 ft | 26 | 1990 |
| Otter AVE over Plymouth Creek | Good | 67.9 ft | 26 | 2016 |
| 160th ST over Mink Creek | Good | 128.0 ft | 26 | 2003 |
| Granite AVE over Bull Run | Good | 69.9 ft | 26 | 2019 |
| Fawn AVE over Bull Run | Good | 132.9 ft | 26 | 2015 |
| Concord AVE over Drainage | Good | 24.9 ft | 26 | 2000 |
| Otter AVE over Trib To Floyd River | Good | 22.3 ft | 26 | 2023 |
| Lake AVE over West Fork Floyd River | Good | 90.9 ft | 26 | 1999 |
| 120th ST over Mink Creek | Good | 41.0 ft | 26 | 2003 |
| 130th ST over Broken Kettle Creek | Good | 22.0 ft | 26 | 2013 |
| 120th ST over Drainage | Good | 41.3 ft | 26 | 2013 |
| Diamond AVE over Broken Kettle Creek | Good | 138.1 ft | 26 | 2003 |
| Roosevelt AVE over Creek | Good | 30.8 ft | 20 | 1956 |
| 310th ST over Big Whiskey Creek | Good | 120.1 ft | 20 | 2008 |
| 308th ST over W Br Perry Creek | Good | 127.0 ft | 20 | 1998 |
| Ideal Road over Drainage | Good | 87.9 ft | 20 | 2003 |
| 280th ST over Unnamed Tributary | Good | 22.6 ft | 20 | 2022 |
| 190th ST over Westfield Creek | Good | 26.9 ft | 20 | 1990 |
| Shamrock AVE over Drainage | Good | 26.9 ft | 20 | 1991 |
| 140th ST over Willow Creek | Good | 125.0 ft | 20 | 2000 |
| 280th ST over Minnie Brook | Good | 78.1 ft | 15 | 2004 |
| 230th ST over Big Whiskey Slough | Good | 129.9 ft | 15 | 2017 |
| 270th ST over Deer Creek Tributary | Good | 22.0 ft | 15 | 2023 |
| 270th ST over Deer Creek | Good | 78.1 ft | 15 | 1997 |
| 220th ST over Plymouth Creek | Good | 128.0 ft | 15 | 2004 |
| 180th ST over Br Of Whiskey Creek | Good | 73.2 ft | 15 | 2016 |
| 180th ST over Big Whiskey Slough | Good | 100.1 ft | 15 | 2006 |
| 180th ST over Bull Run | Good | 25.9 ft | 15 | 1985 |
| Evergreen AVE over Bull Run | Good | 132.9 ft | 15 | 2014 |
| Diamond AVE over Westfield Creek | Good | 75.1 ft | 15 | 2002 |
| Pioneer AVE over Willow Creek | Good | 125.0 ft | 15 | 1990 |
| 150th ST over Willow Creek | Good | 132.9 ft | 15 | 2011 |
| Mahogany AVE over Wolf Creek | Good | 45.9 ft | 15 | 2006 |
| Hedge AVE over Small Creek | Good | 25.9 ft | 15 | 2020 |
| 320th ST over Muddy Creek | Good | 92.8 ft | 11 | 2017 |
| 280th ST over Perry Creek | Good | 128.0 ft | 11 | 2005 |
| 270th ST over Big Whiskey Slough | Good | 134.8 ft | 11 | 1990 |
| Nature AVE over Big Whiskey Creek | Good | 21.0 ft | 11 | 1995 |
| Iris AVE over Creek | Good | 62.0 ft | 11 | 2010 |
| 190th ST over Drainage | Good | 101.0 ft | 11 | 1975 |
| 100th ST over Deep Creek | Good | 94.2 ft | 11 | 2006 |
| Polk AVE over Willow Creek | Good | 128.0 ft | 11 | 2006 |
| Polk AVE over Drainage | Good | 45.9 ft | 11 | 2005 |
| Hedge AVE over Broken Kettle Creek | Good | 49.9 ft | 11 | 2014 |
| 280th ST over Johns Creek | Good | 128.0 ft | 5 | 1992 |
| Juniper AVE over Drainage | Good | 24.9 ft | 5 | 1990 |
| Local over Drainage | Good | 41.0 ft | 5 | 2005 |
| 120th ST over Willow Creek | Good | 128.0 ft | 5 | 1989 |
| Evergreen AVE over Indian Creek | Good | 83.0 ft | 5 | 1996 |
| Fir AVE over Dubols Creek | Good | 24.0 ft | 5 | 2022 |
| 120th ST over Indian Creek | Good | 24.0 ft | 5 | 2021 |