<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <meta content="text/html; charset=ISO-8859-1"
      http-equiv="Content-Type">
  </head>
  <body bgcolor="#ffffff" text="#000000">
    One cubic foot = 7.481 gallons.<br>
    Thus, keeping the 1 square foot base constant, one gallon is 1 /
    7.481 feet, or about 1.6"<br>
    <br>
    <br>
    On 2/15/2011 8:34 PM, Jason Holstine wrote:
    <blockquote cite="mid:C980BDFC.F96E%25jason@amicusgreen.com"
      type="cite">
      <title>Re: [Greenbuilding] quick tools for calculating rainwater
        run-off?</title>
      <font face="Calibri, Verdana, Helvetica, Arial"><span
          style="font-size: 11pt;">I believe the calc is = every square
          foot of roof surface gives one gallon of water for every 1/4”
          of rainfall.<br>
          <br>
          <br>
          On 2/15/11 8:14 PM, "Erin Rasmussen" <<a
            moz-do-not-send="true" href="erin@trmiles.com">erin@trmiles.com</a>>
          wrote:</span></font>ioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</blockquote>
  </body>
</html>