What are the advantages and disadvantages of Butteress dam??
Buttress dams require less concrete than gravity dams. Uplift/ice pressure is generally not a major factor
Can be designed to accommodate moderate movements of foundations without serious damages.
Can be easily raised subsequently by extending buttresses and deck slabs.
Buttress dams require costlier formwork, reinforcement and more skilled labour. Consequently, the overall cost of construction may be more than that of a gravity dam.
Buttress dams are more susceptible to damage .
Buttress dams cannot be constructed in very cold climates because of spalling of concrete.