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<br />"1-- <br /> <br />'r) <br /> <br />:, <br /> <br />nnH55 <br /> <br />GUNNISON RIVER ICING INVESTIGATION <br /> <br />Table of Contents <br /> <br />Page <br /> <br />1.0 INTRODUCTION AND BACKGROUND <br /> 1.1 General and Authorization <br /> 1.2 Study Objective .., <br /> 1.3 Previous Investigations <br /> 1.4 Historical Conditions and Icing Action <br />2.0 GENERAL ICING MECHANICS <br /> 2.1 General <br /> 2.2 Ice Cover <br /> 2.3 Frazil Ice Production <br /> 2.4 Ice Jams <br /> <br />1 <br />1 <br />1 <br />2 <br />2 <br /> <br />3 <br />3 <br />3 <br />6 <br />8 <br /> <br />3.0 SITE SPECIFIC ANALYSIS GUNNISON RIVER ABOVE BLUE MESA RESERVOIR 11 <br />3.1 General 11 <br />3.2 Previous Observations 11 <br />3.3 Winter of 1984-85 Observations 13 <br />3.3.1 Observation Program 13 <br />3.3.2 Chronological Description 15 <br />3.4 Evaluation of Specific Gunnison River Icing 27 <br />3.5 Conclusions 49 <br /> <br />4.0 POTENTIAL METHODS OF CONTROL <br />4.1 General <br />4.2 Diking <br />4.3 Mechanical Control or Heat Induction <br />4.4 Reservoir Level Reduction <br />4.5 Local Action During Flooding <br />4.6 River Control Structures <br />4.7 Flow Regulation <br /> <br />51 <br />51 <br />51 <br />53 <br />54 <br />55 <br />56 <br />56 <br /> <br />5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> <br />56 <br />