| US 69 over Galls Creek | Poor | 34.1 ft | 2,450 | 1930 |
| FM 1870 330th over Winnebago River | Poor | 128.0 ft | 2,192 | 1963 |
| FM 2430 James over W Branch Iowa River | Poor | 91.9 ft | 828 | 1948 |
| 1350 170th ST over West Iowa River | Poor | 113.8 ft | 569 | 1979 |
| FM 2380 Deer Av over Drainage Ditch 97 | Poor | 25.9 ft | 447 | 1968 |
| FM 2030 Vail over Golls Creek | Poor | 40.0 ft | 259 | 1969 |
| 1550 210th ST over Drainage Ditch 6 | Poor | 47.9 ft | 259 | 1968 |
| 1860 210th ST over East Iowa River | Poor | 128.9 ft | 259 | 1967 |
| 1200 210th ST over West Iowa River | Poor | 77.1 ft | 170 | 1961 |
| Loc 2030 210th over Golls Creek | Poor | 37.1 ft | 62 | 1955 |
| 2870 Birch AVE over Plum Creek | Poor | 63.0 ft | 51 | 1975 |
| 1870 Crane AVE over Boone River | Poor | 41.0 ft | 36 | 1925 |
| 1290 190th ST over West Iowa River | Poor | 95.1 ft | 26 | 1957 |
| 1940 Deer AVE over Boone River | Poor | 58.1 ft | 26 | 1967 |
| FM 830 260 ST over West Iowa River | Poor | 44.9 ft | 26 | 1956 |
| 410 140th ST over Boone River | Poor | 50.9 ft | 21 | 1927 |
| 1840 Quail AVE over Dd #6 | Poor | 21.0 ft | 21 | 1970 |
| 180th ST over Drainage Ditch #10 | Poor | 24.9 ft | 21 | 1994 |
| 1290 Echo AVE over Boone River | Poor | 115.2 ft | 20 | 1969 |
| FM 330 190th ST over Boone River | Poor | 37.1 ft | 20 | 1925 |
| 1760 180th ST over East Iowa River | Poor | 121.1 ft | 15 | 1959 |
| 1780 Hill AVE over Trib Boone River #8 | Poor | 57.1 ft | 15 | 1957 |
| 1970 Crane AVE over Dd #10 | Poor | 57.1 ft | 15 | 1969 |
| 2740 Urban AVE over Dd #13 | Poor | 61.0 ft | 15 | 1969 |
| 1450 Deer AVE over Boone River | Poor | 68.9 ft | 11 | 1968 |
| 300 210th ST over Dd #10 | Poor | 44.9 ft | 11 | 1958 |
| 2680 270th ST over East Branch Ia River | Poor | 44.9 ft | 11 | 1958 |
| US 18 over Drainage Ditch | Fair | 107.9 ft | 5,200 | 1958 |
| US 18 over West Fork Iowa River | Fair | 107.9 ft | 5,200 | 1958 |
| B-14 over Private DR | Fair | 87.9 ft | 3,502 | 1972 |
| US 18 over Boone River | Fair | 91.9 ft | 2,980 | 1959 |
| US 18 over Branch Boone River | Fair | 82.0 ft | 2,980 | 1959 |
| US 69 over E Branch Iowa River | Fair | 80.7 ft | 2,470 | 2018 |
| US 69 over Drainage Ditch | Fair | 42.0 ft | 2,450 | 1930 |
| US 69 over Iowa River Overflow | Fair | 21.0 ft | 1,650 | 1922 |
| R-35 FM over West Otter Creek | Fair | 34.1 ft | 1,127 | 1938 |
| Taft AVE over Dd #13 | Fair | 63.0 ft | 709 | 1974 |
| FM 2030 170th over Drainage Ditch #9 | Fair | 54.1 ft | 688 | 1975 |
| 1840 170th ST over E Br Iowa River | Fair | 142.1 ft | 649 | 1975 |
| FM 780 120th ST over E. Br Boone River | Fair | 67.9 ft | 518 | 1980 |
| FM 640 120th ST over Mid Br Boone River | Fair | 79.1 ft | 518 | 1988 |
| FM 1400 310th over Drainage Ditch 1&2 | Fair | 30.8 ft | 478 | 1974 |
| FM 640 225th ST over Boone River | Fair | 67.9 ft | 467 | 1986 |
| FM 570 120th ST over Boone River | Fair | 116.1 ft | 439 | 1979 |
| FM 1440 110th over West Branch Ia River | Fair | 151.9 ft | 429 | 1976 |
| FM 100 160th ST over Boone River | Fair | 55.1 ft | 330 | 1948 |
| FM 2090 260 ST over Drainage Ditch #13 | Fair | 67.9 ft | 230 | 1976 |
| FM 1920 260 ST over East Iowa River | Fair | 78.1 ft | 210 | 1964 |
| FM 3170 Valley over Winnebago River | Fair | 153.9 ft | 190 | 1974 |
| FM over East Iowa River | Fair | 67.9 ft | 133 | 1975 |
| FM 2040 Echo Av over Boone River | Fair | 78.1 ft | 110 | 1985 |
| FM 1870 225 ST over East Iowa River | Fair | 47.9 ft | 90 | 1972 |
| 2260 305th ST over Winnebago River | Fair | 152.9 ft | 82 | 1974 |
| 1190 220th ST over Dd #1 & 2 | Fair | 102.0 ft | 81 | 1973 |
| 1280 320th ST over Dd 1&2 | Fair | 44.9 ft | 63 | 1956 |
| 210th ST over Golls Creek | Fair | 32.2 ft | 62 | 2012 |
| 2240 Crane AVE over Dd 10 | Fair | 67.9 ft | 51 | 1976 |
| 3330 Ames AVE over Buffalo Creek | Fair | 78.1 ft | 47 | 1985 |
| FM 1320 290th over Drainage Ditch 1&2 | Fair | 102.0 ft | 46 | 1983 |
| B-62 over W Otter Creek Dd 26 | Fair | 44.0 ft | 42 | 1959 |
| 950 150th ST over West Otter Creek Dd 26 | Fair | 57.1 ft | 41 | 1976 |
| 720 130th ST over Dd #159 | Fair | 57.1 ft | 41 | 1958 |
| 490 130th ST over Boone River | Fair | 103.0 ft | 40 | 1979 |
| 1740 Rake AVE over East Branch Ia River | Fair | 145.0 ft | 35 | 1985 |
| 1320 150th ST over West Iowa River | Fair | 107.9 ft | 31 | 1956 |
| 3180 Maple AVE over Dd 1&2 | Fair | 44.9 ft | 31 | 1958 |
| 1250 160th ST over West Iowa River | Fair | 151.9 ft | 30 | 1977 |
| 840 190th ST over Br.boone River #8 | Fair | 66.9 ft | 26 | 1980 |
| FM 1220 260 ST over Drainage Ditch 1&2 | Fair | 78.1 ft | 26 | 1973 |
| FM 1640 290th over East Branch Iowa River | Fair | 102.0 ft | 26 | 1982 |
| 930 140th ST over West Otter Creek Dd 26 | Fair | 61.0 ft | 21 | 1975 |
| 820 180th ST over Br. Boone River #8 | Fair | 77.1 ft | 21 | 1981 |
| 1840 280th ST over East Branch Ia River | Fair | 66.9 ft | 21 | 1976 |
| 600 140th ST over Dd #8 | Fair | 70.9 ft | 15 | 1955 |
| 100 Crane AVE over Drainage Ditch 61 | Fair | 66.9 ft | 15 | 1975 |
| 730 170th ST over Dd #8 | Fair | 66.9 ft | 15 | 1983 |
| 780 170th ST over Br Boone River #8 | Fair | 66.9 ft | 15 | 1978 |
| 2830 Sage AVE over Ia River East Branch | Fair | 77.1 ft | 15 | 1985 |
| 160 280th ST over Plum Creek | Fair | 66.9 ft | 11 | 1977 |
| 1380 300th ST over Dd 1&2 | Fair | 25.9 ft | 11 | 1956 |
| US 18 over E Branch Iowa River | Good | 103.0 ft | 6,500 | 2002 |
| US 69 over E Branch Iowa River | Good | 171.3 ft | 1,650 | 2015 |
| Ia 17 over Prairie Creek | Good | 36.1 ft | 1,250 | 1991 |
| B36 (225th St) over Drainage Ditch 5 | Good | 25.9 ft | 851 | 2013 |
| B-63 over West Otter Creek Dd 26 | Good | 78.1 ft | 498 | 2007 |
| FM 1980 110th over East Iowa River | Good | 145.0 ft | 399 | 1957 |
| 1780 200th ST over East Iowa River | Good | 128.0 ft | 399 | 2007 |
| 225th ST over Drainage Ditch 97 | Good | 90.9 ft | 315 | 2022 |
| B55 160th ST over Dd #8 | Good | 25.9 ft | 300 | 2017 |
| Loc 1620 Taft over Drainage Ditch 9 | Good | 24.9 ft | 235 | 2010 |
| FM 2160 Sioux over D.d.#5 | Good | 21.0 ft | 230 | 1987 |
| FM 2080 Sioux over Golls Creek | Good | 24.9 ft | 230 | 1991 |
| 3220 Reed AVE over Silver Creek Dd 7 | Good | 78.1 ft | 153 | 2005 |
| 950 110th ST over West Otter Creek Dd 26 | Good | 78.1 ft | 134 | 1997 |
| FM 220 290th ST over Plum Creek | Good | 83.0 ft | 131 | 2007 |
| FM 3150 Taylor over Winnebago River | Good | 152.9 ft | 90 | 1992 |
| 1110 220th ST over W.br. Iowa River | Good | 103.0 ft | 81 | 1993 |
| B62 over West Iowa River | Good | 129.9 ft | 50 | 2013 |
| 190 150th ST over Boone River | Good | 103.0 ft | 50 | 1989 |
| Local over East Br Boone River | Good | 127.0 ft | 50 | 1983 |
| 1770 190th ST over East Branch Ia River | Good | 144.0 ft | 50 | 1993 |
| 2460 Sioux AVE over Dd #13 | Good | 68.9 ft | 50 | 1976 |
| 1480 Taft AVE over East Iowa River | Good | 152.9 ft | 46 | 2005 |
| 110th ST over E Br Boone River | Good | 81.0 ft | 45 | 2020 |
| 1995 150th ST over East Iowa River | Good | 138.1 ft | 41 | 2005 |
| 1390 120th ST over West Branch Iowa River | Good | 151.9 ft | 41 | 1984 |
| 1020 Quail AVE over West Branch Ia River | Good | 130.9 ft | 41 | 2010 |
| 150th ST over Dd #8 | Good | 83.0 ft | 41 | 2012 |
| R16 Birch AVE over Buffalo Creek | Good | 83.0 ft | 41 | 2015 |
| 140th ST over West Branch Ia River | Good | 150.9 ft | 36 | 2016 |
| 1060 Palm AVE over West Branch Ia River | Good | 128.0 ft | 35 | 2007 |
| 620 110th ST over Mid Br Boone River | Good | 83.0 ft | 35 | 2008 |
| 1430 Iowa AVE over D.d.#159 | Good | 66.9 ft | 30 | 1984 |
| Loc 1220 270 ST over Dd 1 & 2 | Good | 89.9 ft | 30 | 2007 |
| 1240 Union AVE over East Iowa River | Good | 151.9 ft | 26 | 1979 |
| Loc 2100 Union over Golls Creek | Good | 78.1 ft | 26 | 1987 |
| 1270 200th ST over West Branch Ia River | Good | 110.9 ft | 26 | 2011 |
| 610 220th ST over Boone River | Good | 66.9 ft | 26 | 1978 |
| 200th ST over Boone River | Good | 70.9 ft | 26 | 2014 |
| 250th ST over Dd #1&2 | Good | 81.0 ft | 26 | 2018 |
| 1370 Union AVE over East Iowa River | Good | 151.9 ft | 21 | 1983 |
| 150th ST over Dd # 159 | Good | 78.1 ft | 21 | 2000 |
| Loc 2340 200th over Golls Creek | Good | 26.9 ft | 21 | 2011 |
| Loc 2240 200th over Golls Creek | Good | 28.9 ft | 21 | 2007 |
| Loc 2280 200th over Golls Creek | Good | 30.8 ft | 21 | 2007 |
| 1340 180th ST over West Iowa River | Good | 115.2 ft | 21 | 2005 |
| FM 1930 Yale over Golls Creek | Good | 28.9 ft | 20 | 2010 |
| 760 140th ST over Branch Boone Rvr Dd 159 | Good | 77.1 ft | 15 | 1985 |
| 1030 Grant AVE over E Br Boone River | Good | 78.1 ft | 15 | 2007 |
| Crane AVE over Boone River | Good | 92.8 ft | 15 | 2012 |
| 110th ST over Boone River | Good | 103.0 ft | 15 | 2002 |
| 170th ST over Boone River | Good | 90.9 ft | 15 | 2021 |
| Loc 910 250 ST over West Br Iowa River | Good | 103.0 ft | 15 | 2006 |
| 190th ST over Golls Creek Dd177 | Good | 21.0 ft | 11 | 2021 |
| 130th ST over Mid Br Boone River Dd 8 | Good | 25.9 ft | 10 | 2020 |