▁Music ▁Guide ] ▁Will ie ▁on ▁My Space ▁Gary ▁Gra ff ' s ▁Billboard ▁Review ▁of ▁Album ▁Tw an ville ▁Review ▁of ▁House ▁Of ▁A ▁Th ous and ▁Gu it ars ▁by ▁May er ▁Dan zig ▁ ▁Category : 2 0 0 9 ▁albums ▁Category : Will ie ▁N ile ▁albums ▁Category : Al bum s ▁produced ▁by ▁Stewart ▁L erman <0x0A> </s> ▁Open ▁channel ▁sp ill ways ▁are ▁dam ▁sp ill ways ▁that ▁util ize ▁the ▁principles ▁of ▁open - channel ▁flow ▁to ▁convey ▁imp ounded ▁water ▁in ▁order ▁to ▁prevent ▁dam ▁failure . ▁They ▁can ▁function ▁as ▁principal ▁sp ill ways , ▁emer gency ▁sp ill ways , ▁or ▁both . ▁They ▁can ▁be ▁located ▁on ▁the ▁dam ▁itself ▁or ▁on ▁a ▁natural ▁grade ▁in ▁the ▁vic inity ▁of ▁the ▁dam . ▁ ▁Sp ill way ▁Types ▁ ▁Ch ute ▁sp ill way ▁▁ ▁Ch ute ▁sp ill ways ▁carry ▁super crit ical ▁flow ▁through ▁the ▁ste ep ▁slope ▁of ▁an ▁open ▁channel . ▁There ▁are ▁four ▁main ▁components ▁of ▁a ▁ch ute ▁sp ill way : ▁The ▁elements ▁of ▁a ▁sp ill way ▁are ▁the ▁in let , ▁the ▁vertical ▁curve ▁section ▁( og ee ▁curve ), ▁the ▁ste ep - s loped ▁channel ▁and ▁the ▁out let . ▁ ▁In ▁order ▁to ▁avoid ▁a ▁hyd ra ul ic ▁jump , ▁the ▁slope ▁of ▁the ▁sp ill way ▁must ▁be ▁ste ep ▁enough ▁for ▁the ▁flow ▁to ▁remain ▁super crit ical . ▁ ▁Pro per ▁sp ill ways ▁help ▁with