Question

If the material of dam is having specific gravity of 2.6 and the base width of 30 m then the approximate allowable height of dam is

• A. 5 m
• B. 32 m
• C. 48 m
• D. 55 m

Answer 1

The correct option is C 48 m

For elementary profile of dam base width,
$B=\frac{H}{\sqrt{S_c-C}}$
Since no data of uplift is given so it is ignored (i.e. C = 0)
$\therefore B=\frac{H}{\sqrt{S_c}}$
$\therefore H=B\sqrt{S_c}=30\times \sqrt{2.6}$
$=48.37m\simeq 48m$