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I I I I I I I I I I I I I I I I I I I CLEAR CREEK YOUNGFIELD THROUGH GOLDEN MAJOR DRAINAGEWAY PLAN PHASE B REPORT TABLE OF CONTENTS SECTION I - SUMMARY Summary of Selected Plan Reach 1 Reach 2 Reach 3 Summary of Costs Acknowledgements SECTION II - STUDY AREA DESCRIPTION Introduction Reach 1 (Upstream Golden City Limit to Tucker Gulch) Station 885+00 to Station 955+00 Reach 2 (Tucker Gulch to McIntyre Street) Station 744+00 to Station 885-00 Reach 3 (McIntyre Street to Youngfield Street) Station 651+00 to Station 744+00 SECTION III - HYDROLOGICAL SUMMARY General Comments Hydrology for Clear Creek Soils Vegetation SECTION IV - FLOODPLAINS General Flood Profiles Flood Damages SECTION V - PHASE A ALTERNATIVES AND THE SELECTED PHASE B PLAN General Comments SECTION VI - PHASE B MAJOR DRAINAGEWAY PLAN General Comments Major Drainageway Improvement Costs Recommended Improvements ReaCh 1 Reach 2 Reach 3 TABLE OF CONTENTS (Continued) PAGE I-I I-I I-I 1-2 1-2 1-3 SECTION VII - REFERENCES APPENDIX A - LEGAL OPINION APPENDIX B - RECOMMENDED STRUCTURAL CRITERIA FOR MAJOR DRAINAGEWAYS APPENDIX C - PHASE B PRELIMINARY DESIGN DRAWINGS SHEET COMMENTARY AND COST ESTIMATE II-I II-I II-I II-2 LIST OF TABLES TABLE NO. TITLE I-I II I-I IV-l V-I VI-l Cost Summary for Improvements Identified in Phase B Report Peak Runoff Flows Phase A Average Annual Flood Damages Phase A Benefit Cost Comparison Lower Clear Cost Summary for Improvements Identified in Phase B Report Unit Prices Annual Operation and Maintenance Costs III-I II I-I 1II-2 III-2 VI-2 VI-3 LIST OF FIGURES IV-l FIGURE NO. rV-l IV-l II-I II-2 C-l C-2 V-I TITLE Study Reaches and Jurisdictional Boundaries Drainage Basin Boundary Title Sheet Phase B Preliminary Design Drawings Sheet Index/Legend for Phase B Preliminary Des ign Drawi ngs VI-l VI-l VI-3 VI-3 VI-4 VI-4 Creek PAGE VlI-l A-I B-1 C-l PAGE 1-2 111-1 IV-l V-3 VI-l VI-2 VI-2 PAGE 11-2 1-3 C-l C-2