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<br />3.7 <br /> <br />Table 3.2. <br /> <br />Rainfall Depths for 30-Minute, 1-Hour and <br />24-Hour Storms. <br /> <br />Return <br />Period <br />(years) <br /> <br />Rainfall Depth (inches) <br />30-Minutes* 1-Hour 24-Hour <br /> <br />2 <br />5 <br />10 <br />25 <br />50 <br />100 <br /> <br />0.55 <br />0.71 <br />0.87 <br />1.0 <br />1. 15 <br />1.26 <br /> <br />0.7 <br />0.9 <br />1.1 <br />1.3 <br />1.45 <br />1.6 <br /> <br />1.4 <br />1.8 <br />2.3 <br />2.6 <br />3.0 <br />3.35 <br /> <br />*Based on 79% of 1-hour value, adapted <br />from u.s. Weather Bureau Technical <br />Paper No. 40. <br />