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WRIA 15 WATERSHED PLAN —FINAL DRAFT <br /> Table of Contents <br /> Acknowledgements <br /> ExecutiveSummary..............................................................................................................................................A <br /> Chapter1—Plan Overview.....................................................................................................................................1 <br /> 1.1 WRIA 15 Watershed Plan Purpose and Structure................................::............................................................1 <br /> 1.2 Requirements of the WRIA 15 Watershed Restoration and Enhancement Plan............................:....................4 <br /> 1.3 Overview of the WRIA 15 Committee....................................:............::..............................................................5 <br /> Chapter Two:Watershed Overview.....................................................................:..................................................10 <br /> 2.1 Brief Introduction to WRIA 15 ...............................:...........................................:.................................................10 <br /> 2.2 Watershed Planning in WRIA 15........................... <br /> ......................................................................................19 <br /> 2.3 Description of the Watershed—Geology, Hydrogeology, Hydrology;and Streamflow,...................................21 <br /> Chapter Three:Subbasin Delineation...................:....................... <br /> ........................................................................28 <br /> 3.1 Introduction.............................................................:.:...........................................................................................28 <br /> 3.2 Approach to Develop Subbasins................:...:..................................................................................................28 <br /> 3.3 WRIA 15 Subbasins...................:........................:....:........:.........................:.:..:'....................................:............29 <br /> Chapter Four:New Consumptive Water.Use Impacts :...........................................................32 <br /> 4.1 Introduction to Consumptive Use.:....................................................................................................................32 <br /> 4.2 Projection of Permit-Exempt Well Con nections,(2018`2038)..........................................................................32 <br /> 4.3 Impacts of New Consumptive Water Use................... ............................................................................38 <br /> ChapterFive:WRIA 15 Projects............................................................................................................................54 <br /> 5.1 Description and assessment. .....':..............:.......................................................................................................54 <br /> 5.2 Category I Projects....................:....I...................................................................................................................56 <br /> 5.3 Category II-IV Projects.......................................................................................................................................78 <br /> 5.3 Project Implementation Summary....................................................................................................................82 <br /> Chapter 6.Additional Plan Recommendations.....................................................................................................84 <br /> 6.1 Policy and Regulatory Recommendations........................................................................................................84 <br /> 6.2 Adaptive Management Recommendations......................................................................................................89 <br /> 6.3 Assurance of Plan implementation...................................................................................................................98 <br /> Chapter Seven: Net Ecological Benefit Evaluation..............................................................................................101 <br /> 7.1 Water Offsets..................................................................................................................................................101 <br /> 7.2 Benefits from Category II-IV Projects..............................................................................................................104 <br /> WRIA 15—FINAL DRAFT PLAN <br /> Page iii February 2021 <br />