Part A

The concrete gravity dam is shown in $($Figure $1).$ The specific weight of concrete is ${}_c=150l\frac{b}{f}{t}^3.$ The specific weight of water is ${}_w=624l\frac{b}{f}{t}^3.$ Hint Work the problem using a $1-ft$ width of the dam.

Figure

$1$ of $1$

Determine the critical height $h$ of the water level before the concrete gravity dam starts to tip over due to water pressure acting on its face.

Express your answer in feet to three significant figures.

$h=$

$ft$

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