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<br />001014 <br /> <br />Construction of Pre-Slide Outlet Works <br /> <br />'--, <br />! <br /> <br />have to <br />Several <br />.. <br />works, <br />below, <br />* <br /> <br />Control of flooding by reservoir may be possible by providing a <br /> <br />drainage outlet below the slide at the level of the river or the highway <br /> <br /> <br />before movement of the slide occurs, The outlet works would obviously <br /> <br />be constructed in stable ground on the bank opposite the slide. <br /> <br /> <br />ideas have been suggested concerning the form of the outlet <br /> <br />The options under consideration by the task force are listed <br /> <br />lay a substantial gravel seam at the toe of the slide as soon as. <br /> <br />significant movement occurs <br /> <br />* construct a 10 to 12 foot diameter reinforced concrete sewer <br /> <br />pipeline <br /> <br />* construct a reinforced concrete bo. culvert. <br /> <br />* e.cavate a tunnel <br /> <br />Additional Studies <br /> <br />... <br /> <br />Further hydrologic investigations may be appropriate if additional <br /> <br />work by the Colorado Geological Survey indicates movement of the slide <br />,,'" <br /> <br />areas could be significant. Refinement of this analysis would include <br /> <br />looking at the runoff volume of flow during an average runoff season and <br /> <br />during 1984 for comparison. <br /> <br />The reservoir capacity curves should be checked using more detailed <br />maps, if available, and a planmeter. <br />