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<br />2.2 <br /> <br />4. Blueline planimetric "Map of the City of Ouray, Colorado," by J. Walter <br />Socha, April 1970, scale 1"=400'. <br /> <br />5. Location map of water and sewer lines for the City of Ouray. <br /> <br />Geology and Debris Flows <br /> <br />1. Map of Natural Hazards of Cascade and Portland Creek Watersheds, <br />Institute of Arctic & Alpine Research, University of Colorado, Boulder, <br />Edited by M. J. Bovis, 1976. <br /> <br />2. "Mudflows in the San Juan Mountains, Colorado," Unpublished M.S. thesis <br />by D. R. Sharpe, University of Colorado, Boulder, 1974. <br /> <br />3. '~eology of the Ouray Quadrangle, Colorado," by R. G. Luedke, U.S. <br />Geologic Survey, Washington, DC, GQ-152, 1962. <br /> <br />2.2 Field Studies <br /> <br />Three field trips were taken to Ouray during the study period. The <br /> <br /> <br />information gathered during these trips is listed below: <br /> <br />1. Profile of the Portland and Cascade Creek Flumes. <br /> <br />2. Estimation of deposited debris volumes from the August 20, 1982, flood. <br /> <br />3. Dimensions of the flume, bridges and box culverts along Portland and <br />Cascade Creeks. <br /> <br />4. Inspection of the watersheds above the flumes. <br /> <br />5. Observation of the path of debris and floodwaters from the August 20, <br />1982, flood. <br /> <br />6. Inspection of damages from August 20, 1982, flood. <br /> <br />7. Conversations with witnesses to the 1982 and previous floods. <br /> <br />8. Suggestions for solutions to the flume problems from Ouray residents. <br />