Figure 1-3: Highway Bridge Condition

Figure 1-3: Highway Bridge Condition

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Iowa

Year Total # of Bridges Structurally deficient Functionally obsolete Total of Both
# % # % # %
1996 25,624 4,694 18 3,023 12 7,717 30
1997 25,143 4,627 18 2,658 11 7,285 29
1998 25,175 4,729 19 2,384 9 7,113 28
1999 25,130 4,913 20 2,301 9 7,214 29
2000 24,632 5,008 20 2,116 9 7,124 29
2001 25,030 5,036 20 2,060 8 7,096 28

United States

Year Total # of Bridges Structurally deficient Functionally obsolete Total of Both
# % # % # %
1996 582,043 101,544 17 81,217 14 182,761 31
1997 583,207 98,521 17 77,466 13 175,987 30
1998 583,414 93,119 16 79,567 14 172,686 30
1999 585,542 88,150 15 81,900 14 170,050 29
2000 587,458 86,692 15 80,889 14 167,581 29
2001 590,066 83,630 14 81,469 14 165,099 28

SOURCE: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory: Deficient Bridges by State and Highway System, Washington, DC: 2001, available at http://www.fhwa.dot.gov/bridge/britab.htm as of Jan. 31, 2002.