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oFz <br />IUFzo <br />C) <br />l!o <br />tuJ <br />dl <br />t- <br />Table of Gontents <br />lntroduction <br />1.1, Project Purpose....... <br />1.3. Design Codes and References...... <br />1.3.1. Department of Ecology <br />1.2, Report Purpose....... <br />1 <br />,1 <br />1 <br />1 <br />1 <br />1 <br />a <br />2 <br />2 <br />2 <br />3 <br />3 <br />3 <br />4 <br />4 <br />4 <br />6 <br />6 <br />6 <br />8 <br />I <br />I <br />q <br />1.3.2. City of Roslyn <br />2 Basin Description ... ...... <br />2.1. General <br />2.2. Historic and Existing Conditions <br />2.3. Proposed Conditions <br />3. Project Site Descriplion <br />3. 1. Project Limits........... <br />4 <br />5. <br />b. <br />3.2. Project Site Gonditions................. <br />3.3. Stormwater Features. <br />Core Element Analysis ......... <br />Alternatives Considered ....... <br />Design Analysis <br />6.1. Existing Stormwater Drainage System <br />6.2. Proposed BMP Design and lmprovements. <br />7 Water Qualily Benefit.,.... <br />7.1. Runoff Treatment Comparison. <br />7.2. Equivalent New/Redevelopment Areas <br />L Capital lmprovement P|an........... <br />EXHIBITS <br />Exhibit 1 - Basin and Study Map <br />APPENDICES <br />Appendix A - Drainage Parameters <br />Appendix B - Existing Flow Rates <br />Appendix G - Swale Calculations <br />Appendix D - Equivalent New Redevelopment Areas for Biofiltration Swales Calculations Sheet <br />Appendix E - CIP 1 Cost Estimate <br />Appendix F - Operations and Maintenance Tables