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<br /> <br />off later through normal channels at lo..&r volumes and <br />velocities. Parks, playgrounds and parking areas can be <br />useful In this oIay and they can be cleaned up relatively <br />easily after a flood. Storm seolers, drop structures, <br />channel fzatlon, and Irrigation ditches are used to dissipate <br />f lood...ater energy and to direct hl;jh ...ater a...ay from or <br />through developed areas to 03nother location. Floods usually <br />subject several governmento!ll JuriSdictions to a natural, <br />though man-aggravated, hazard. Consequently, flood control, <br />drainage and land use programs and policies must be on a <br />regional or river basIn basis If damage from floods Is to be <br />minimized. Jtharwlse, one araa might be protected at the <br />e~pense of o!Inother. nhere structures must be bul It In areas <br />subject to flOOding, specialized designs and construction <br />methods can be Implemented. The effect of these structures <br />on the rest of the flood plain must be understOOd In order to <br />prevent Increased flood damage to adjacent properties. <br />Keep I n9 natural and m.3nmade dral nageways open and free of <br />debris and ~eeplng lowlylng .)reas undeveloped helps minimize <br />the damage from hl;jh oIo!1ter. <br /> <br />Land Use <br /> <br />Keep I n9 f lood.prone areas undeve loped except as park I ng <br />areas, parks, and playgroundS, for example, avoIds <br />unnecessary damage. Farming, livestock grazing, ...oodlands, <br />and sand and gravel mining are other pOSSible uses. Fringes <br />of dralnageways can double as hiking and bIcycle paths and <br />garden areas. <br /> <br />Case History <br /> <br />"The Flood of 165" caused S506 ,,,11110n In damage and took the <br />lives of six people as the South Platte River "nd some of Its <br />Southern trlbut"rles roared Into the pages of Colorado <br />history on June 16, 1965. The unprecedented flooding was <br />followed a few days later by a sl1l1lar f load on the Ark;ansas <br />~Iver, the tremendous Impact of oIhlch was virtually drowned <br />by the publ Ie attention on the South Platte's surging ...aters <br />and their aftermath. <br /> <br />A combination of tornadoes and violent thunderstorms oIas <br />clImaxed Oy the opening of the rain-chOked clouds over Plum <br />Creek and Its tributaries southwest of Castle ~OCk, south of <br />Oen...er. In a matter of minutes the peacoful creek became a <br />roaring torrent, out of Its banks, cuttIng neol Channels, <br />sweeping aolay trees, houses, bridges, cars, livestock, and <br />portions of Interstate-25 as It raced to Its confluence oIlth <br />the South Platte. The acco.npo!lnylng erosion and mudslides <br /> <br /> <br />f <br /> <br />L~ <br /> <br />, <br /> <br />, <br /> <br />..""" <br /> <br />.. <br /> <br />. <br /> <br /> <br />- <br /> <br />Citizens clean out the fIrst floor of <br />(tHer a flood early In this century. <br /> <br />a buildIng In Ourar <br /> <br /> <br />,. <br /> <br />riarmleSSly, flOOding sweeps through ~ park In Denver In <br />1913. Open space uses like this c&n add to <br />attractiveness of an area and minimize damage during <br />water. <br /> <br />May, <br />'he <br />high <br /> <br />7 <br />