Summary Report p 2 ofDearborn County Bridges

State Comparison of Bridges
No. of Bridges
142 average all counties
102 Dearborn County

Average Age
43 yrs - all counties
51 yrs - Dearborn County

Bridges Greater than 50 years old
27.5% all counties
42% Dearborn County

Average ADT ( average daily traffic)
1,560 all counties
760 Dearborn County

Load Posted Bridges (restricts weight limits)
10.7% all counties
21% Dearborn County

Sufficiency Rating of less than 50
15.3% all counties
20% Dearborn County

Summary of Bridges Built by Decade
1870- 2
1880- 1
1890- 1
1900-1
1910- 8
1920- 8
1930- 7
1940 - 9
1950 -3
1960 3
1970 -9
1980- 17
1990 -20
2000- 7 
2010- 6