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<p>relative to the surrounding soil. Uplift pressures can be reduced by internal and foundation drainage systems.</p>

<p>During construction, the <a href="page.php?w=exothermic_reaction">exothermic</a> curing of <a href="page.php?w=concrete">concrete</a> can generate large amounts of heat.  The poorly-conductive concrete then traps this heat in the dam structure for decades, expanding the plastic concrete and leaving it susceptible to cracking while cooling. It is the designer's task to ensure this does not occur.</p>

<p><big> Design </big></p>
<p>Gravity</p><p>
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