Bridge linking Michigan's upper and lower peninsulas, between St. Ignace and Mackinac City, is 3.4 mi long from anchorage to anchorage 8614 ft; between towers 3800 ft; side spans 1800 ft; piers 19 and 20 are founded by huge caissons in bedrock 195 ft and 190 ft; two main tower caissons are circular, 116 ft in diam. (See also Better Roads v 25 n 6 June 1955 p 36-7, 46, 48; and unsigned description in Eng News-Rec v 154 n 4 Jan 27 1955 p 35-6, 38-9, 42-4)
Mackinac bridge
Traffic Quarterly
Traffic Quarterly ; 9 , n 1
1955
8 pages
2 Plates
Aufsatz (Zeitschrift)
Englisch
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