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TABLE OF CONTENTS LIST OF APPENDICES Appendix A Capital Project Fact Sheets Appendix B Hydrologic/Hydraulic Model Output Tables Appendix C Methodology for Estimating the Effective Impervious Area of Urban Watersheds Appendix D Capital Project Unit Cost Tables Appendix E Evaluation of UICs (i.e., Drywells) with Respect to High Groundwater Appendix F Rain Garden Sizing Calculations and Plan Views for Six ROW Options Appendix G Summary of Model Refinements Since the Initial 2002 Study Appendix H River Road Santa Clara Stormwater Management Strategy Development Map Appendix I Public Comments and Responses LIST OF TABLES Table 2 -1 Average Storm Event ............................................................ ............................... 2 -8 Table 2 -2 Existing Land Use — River Road Santa Clara Basin ............. ............................... 2 -9 Table 2 -3 Buildout Land Use General ................................................ ............................... 2 -10 Table 2 -4 River Road Santa Clara Basin Slope Distribution .............. ............................... 2 -13 Table 2 -5 Summary of Stormwater Quality Monitoring in Eugene .... ............................... 2 -21 Table 2 -6 Soil Permeability in the River Road Santa Clara Basin ...... ............................... 2 -26 Table 2 -7 Runoff Potential in the River Road Santa Clara Basin ....... ............................... 2 -27 Table 2 -8 Hydric Soils in River Road Santa Clara Basin ................... ............................... 2 -28 Table 3 -1 Major Hydrologic Input/Output Data for the River Road Santa Clara Storm Drainage System ...................................................... ............................... 3 -17 Table 3 -2 Hydraulic Performance of the River Road Santa Clara Storm DrainageSystem ................................................................. ............................... 3 -19 Table 3 -3 Rainfall Data Used for the Model Validation ....................... ............................... 3 -7 Table 3 -4 Model Adjustments and Associated Model Results for Node 74406 .................. 3 -8 Table 3 -5 Capacity Deficiencies Identified Through Modeling and Proposed Capital Projects to Address Them ....................................... ............................... 3 -11 Table 3 -6 Capital Project Options Selected to Address Decommissioning of Drywell .............................................................................. ............................... 3-14 Table 4 -1 Summary of Increased ROW Required for Six Different On- Street RainGarden Options ........................................................... ............................... 4 -17 Table 6 -1 Summary of Capital Project Costs and Funding ................... ............................... 6 -6 LIST OF FIGURES Figure 1 -1 Process to Develop the Integrated Stormwater Management Strategies ............. 1 -8 Figure 1 -2 CIP/Master Planning Phase Process for the River Road Santa Clara Basin........ 1 -9 Figure 2 -1 Willamette Region Location Map ......................................... ............................... 2 -3 Figure 2 -2 Basin Location Map .............................................................. ............................... 2 -5 Figure 2 -3 Average Monthly Rainfall .................................................... ............................... 2 -7 Figure 2 -4 Surface Cover in the River Road Santa Clara Basin UGB . ............................... 2 -13 Figure 2 -5 Water Quality Monitoring Sites .......................................... ............................... 2 -19 N:ASTORMWATER \City of EugencARR_SC Stormwater Basin Plan\2012 Document \Master_ Plan _9- 18- 12_DR-AFT Word Version.doc iii