Alabama Highway Department
Mobile Tunnel Contractors (joint venture): Winston Brothers Co, Minneapolis Atlas Construction Co Ltd, Montreal Foundation Co of Canada Ltd, Toronto
Palmer and Baker Engineers Inc, Mobile
106m
747m
30m
Project construction
1973-04-30
7
Two tubes; two lanes each
12.2m
24.5m
Portal ventilation buildings equipped with steel joint transition structures to which
elements are attached. First project in U.S.A. to use modern sandjetting method for
foundation.
elements are attached. First project in U.S.A. to use modern sandjetting method for
foundation.
Fabrication yard set up on site. Uncontrolled side launch.
At pier near site.
Four barges straddling the element. Element placed on temporary footings and adjusted
to line and grade.
to line and grade.
Tremie concrete joints
Continuous steel shell plate.
Jetted sand foundation.