12000000053 Highland N. 3 Dam Inundation Report

• Contract/PO #: 12000000053
• Contractor Name: Highland Ditch Company
• Contract Type: Grant
• Water District: 5
• County: Weld
• Loan Projects - Doc Type: Report

TABLE OF CONTENTS
Page
1.0 INTRODUCTION 1
1.1 Location and Background 1
2.0 DAM BREACH ANALYSIS 1
2.1 Breach Parameter Estimation 1
2.2 Dam Breach Simulation in HEC-HMS 2
2.3 Hydraulic Modeling in HEC-RAS 3
2.4 Results 4
3.0 INUNDATION EXTENTS 4
3.1 Detail of Mapping 4
3.2 Description of Inundation Area 4
4.0 REFERENCES 6
List of Tables
Table 1 Comparison of Dam Breach Parameters Calculated Using Empirical Equations
Table 2 Comparison of HEC-HMS Piping Simulation Results
Table 3 Summary of HEC-HMS Results Downstream of Highland No. 3 Dam
Table 4 Summary of HEC-RAS Results at Critical Sections
List of Appendices
Appendix A Empirical Methods for Predicting Breach Parameters
Appendix B Highland Reservoir No. 3 Storage-Elevation Table
Appendix C HEC-HMS Output
Appendix D HEC-RAS Output
Appendix E Inundation Mapping
HIGHLAND No.3 DAM - i - June 15,2012
INUNDATION MAPPING REPORT