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<br /> <br /> <br /> <br />:-~, <br /> <br />- <br /> <br />, <br /> <br />, <br /> <br />.-. <br /> <br />These ho photos of 'iery similar sma It tr I but ar I es to the 81 g <br />Thompson ~"'er could almost be "before and after" 'ilews. In <br />lH6, one flooded, the other did not. If you were e'ialuatlng <br /> <br />Mountain Torrents <br /> <br /> <br />& Flash Floods <br /> <br />rolOutHAII~ TvrtrtEIH5 and FLA5rl FLuv!):) are local, sudden, and <br />sometimes catastrophIc and short-I l'ied floods of relltl'iely <br />great 'iolume 3nd 'ieloclty. They frequently occur In dry or <br />IntermIttent stream channels where they mO'i8 Lnmense loads of <br />mud, rock fragments and other debris. OrdinarIly, they are <br />caused by brief but nea'iy ralnlel I O'ier a relatl'iely smal I, <br />stlJepty sloping dralna,Je basIn. l>lost small and steep-gradient <br />watersheds In Colorado are subject to flash floods. <br /> <br /> <br />a peacefUl lookIng stream valley for a house sIte, would you <br />e~pect the violent flooding as e'ildenced in the photo which <br />can affect these small tributaries? <br /> <br />9 <br />