Page 97 - Bridge and Highway Structure Rehabilitation and Repair

72 SECTION 1 ADMINISTRATIVE ISSUES

6. Market Street Bridge in Chattanooga, Tennessee is the second longest double leaf bascule
span in the U.S. The steel truss main span is 300 feet long. There are a total of 16 spans,
including three arch spans. It is a landmark located in downtown Chattanooga and has un-
dergone major repairs, reopening in 2007.
7. The Calhoun Street Bridge on the Delaware River was placed on the National Historic
Register in 1975. The two-lane bridge with a sidewalk is only 20 feet wide. It has an open
steel grid deck and seven simply supported spans of pratt truss. Damaged truss members
will be repaired by straightening. It is load posted and does not allow truck traffi c.

Table 2.3 Locations and construction dates of covered bridges by state.

State Number Ranking Earliest Latest
Alabama 14 c1850 1934
California 13 1862 1984
Connecticut 5 1841 1976
Delaware 2 c1870 1870
Georgia 17 c1840 1975
Illinois 9 1854 1987
Indiana 93 4th 1838 1922
Iowa 12 1869 1969
Kentucky 13 c1835 c1925
Maine 12 1857 1990
Maryland 6 c1850 1880
Massachusetts 17 1832 1985
Michigan 6 1832 1980
Minnesota 1 1869
Mississippi 1 1966
Missouri 5 1868 1980
New Hampshire 57 5th 1827 1987
New Jersey 1 1866
New York 29 7th 1823 1982
North Carolina 5 c1860 c1910
Ohio 143 2nd 1829 1986
Oregon 51 6th 1914 1989
Pennsylvania 227 1st 180? 1988
South Carolina 1 1909
Tennessee 6 1876 1977
Vermont 100 3rd c1820 1982
Virginia 9 c1800 1920
Washington 6 1905 1976
West Virginia 17 1852 1911
Wisconsin 2 1876 1962
30 States 880