Water Supply and Water Conservation Management Plan

Transcription

1 Water Supply and Water Conservation Management Plan May 2009 Prepared By: AECOM Metropolitan North Georgia Water Planning District

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3 Water Supply and Water Conservation Management Plan Prepared for: 40 Courtland Street, NE Atlanta, GA Prepared by: AECOM, Maddaus Water Management, and R2T, Inc. May 2009

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5 TABLE OF CONTENTS Executive Summary The Plan Update Process... ES-1 Integration of Planning Efforts... ES-2 Key Changes to the Plan... ES-2 Existing Water Supply and Treatment Facilities... ES-2 Existing Water Supplies... ES-2 Existing Water Treatment Facilities... ES-3 Existing Water Supply Interconnections... ES-3 Existing Interbasin Transfers... ES-3 Water Demand Forecasts... ES-4 Water Conservation Analysis... ES-5 Water Conservation Program... ES-5 Water Supply Sources... ES-6 Water Supply Facilities... ES-7 Water Reuse... ES-8 Local Planning Recommendations... ES-8 Water Supply Issues... ES-9 State and Regional Policy Recommendations... ES-9 Education and Public Awareness... ES-10 Plan Implementation... ES-10 Implementation Funding... ES-10 Future Plan Evaluation... ES-11 Section 1: Introduction The Metro Water District Regional Water Resources Plans Plan Implementation Implementation Progress Water Conservation Program Water Supply Strategies Education and Public Awareness Plan Development Planning Process Planning Participants Policy Goals Plan Update Focus i

6 Integration with State Water Plan Key Changes to the Plan Plan Overview Organization of the Water Supply And Water Conservation Management Plan Section 2: Existing Water Supply and Treatment Conditions Existing Water Supplies Planned Reservoirs Planned Storage Groundwater Sources Interbasin Transfers Existing Chattahoochee Basin Return Flows Existing Water Treatment Facilities Existing Interconnections Non-municipal Permitted Withdrawals Section 3: Water Demand Forecasts Introduction Data Collected Water Billing and Production Data Population Forecasts Plumbing Fixture Stock Assumptions Adjusted Base Year Profile Methodology Top-down Analysis Bottom-up Analysis Baseline Water Demand Forecasts Final Water Demand Forecasts with Metro Water District Conservation Program Beyond Section 4: Water Conservation Analysis Existing Water Conservation Program Evaluation of Additional Potential Water Conservation Measures Cost-effectiveness Analysis Comparison of Measures Best Option Packages District-wide Results of Option Packages Evaluation County Results of Option Packages Evaluation Recommended Water Conservation Program (B) Future Water Demand With Option Packages Comparison with 2003 Plan Section 5: Water Conservation Program Action Item 5.1 Conservation Pricing Action Item 5.2 Replace Older, Inefficient Plumbing Fixtures Action Item 5.3 Require Pre-rinse Spray Valve Retrofit Education Program ii

7 Action Item 5.4 Rain Sensor Shut-off Switches on New Irrigation Systems Action Item 5.5 Require Sub-meters in New Multi-Family Buildings Action Item 5.6 Assess and Reduce Water System Leakage Action Item 5.7 Conduct Residential Water Audits Action Item 5.8 Distribute Low-flow Retrofit Kits to Residential Users Action Item 5.9 Conduct Commercial Water Audits Action Item 5.10 Implement Education and Public Awareness Plan Action Item 5.11 Install High Efficiency Toilets and High Efficiency Urinals in Government Buildings Action Item 5.12 Require New Car Washes to Recycle Water Section 6: Water Supply Sources Meeting 2035 Demand Water Supply Evaluation Criteria Water Supply Sources Chattahoochee River Basin Chattahoochee Basin Limitations Coosa River Basin Coosa Basin Limitations Flint River Basin Ocmulgee River Basin Oconee River Basin Tallapoosa River Basin Future Interbasin Transfers Post-2035 Water Supply Options Chattahoochee River Basin Coosa River Basin Flint River Basin Ocmulgee River Basin Oconee River Basin Tallapoosa River Basin Section 7: Reuse Types of Water Reuse Metro Water District Water Reuse Alternatives Non-potable Reuse Indirect Potable Reuse Reuse Demand Estimates Non-Potable Reuse Demand Estimates Indirect Potable Reuse Estimates Action Item 7.1 Return Reclaimed Water to Lake Lanier and Lake Allatoona for Future Indirect Potable Reuse Conclusions Section 8: Planned Water Supply Facilities Action Item 8.1 Support Construction of 6 Planned Water Supply Reservoirs Action Item 8.2 Construct 6 New Water Treatment Plants iii

8 Action Item 8.3 Expand 28 Existing Water Treatment Plants Proposed Metro Water District Treatment Facilities and Capacities Section 9: Local Water Planning Action Item 9.1 Develop Local Water Master Plans Action Item 9.2 Develop or Update Local Emergency Water Plans Action Item 9.3 Source Water Supply Watershed Protection Action Item 9.4 Water System Asset Management Section 10: Water Resources Issues Federal Operation of Lake Lanier and Allatoona Lake Water Quantity Issues Consumptive Use Reservoir Storage Reliability Regulation of Small Water Withdrawals Instream Flow Protection Policy Emergency and Drought Planning Issues Climate Change Impacts Water Quality Issues Water Treatment Standards Groundwater Treatment Rule Chemicals of Concern Sedimentation of Stream and River Intakes Section 11: State and Regional Policy Recommendations Post-2035 Water Supply Source Planning Facilitate New Water Supply Sources Facilitate Water Permitting Encourage Conservation Through State Legislation Small Water Withdrawals Comprehensive Land Use Plan Coordination Water Conservation Program Evaluation Section 12: Education and Public Awareness Introduction Education and Public Awareness Approach Water Supply and Water Conservation Messages Target Audiences Delivery Techniques Regional Education Program Local Education Program Local Education Program Requirements Example Descriptions of Activities Section 13: Implementation Plan Introduction Roles iv

9 Implementation Schedules Implementation Costs Implementation Funding Water Rates General Appropriations (General Fund) Loans/Bonds Service Fees Grants Section 14: Future Plan Evaluation Introduction Plan Reviews and Updates Annual Reviews Plan Updates Recommended Annual Reviews and Updates Plan Accountability Measuring Progress Overall Water Use Metrics Measuring the Water Conservation Program Conclusions APPENDICIES Appendix A Appendix B Plan Accountability Index County Level Summaries v

10 LIST OF FIGURES Executive Summary Figure ES-1: Metro Water District Overall Per Capita Water Use Trends ( )... ES-4 Figure ES-2: Metro Water District Water Demand and Supply... ES-7 Section 1: Introduction Figure 1-1: Metro Water District Area Figure 1-2: Metro Water District Major River Basins Figure 1-3: Metro Water District Plan Development and Implementation Figure 1-4: Water Conservation Measures Implementation Figure 1-5: Water Rate Structures by Population Served Figure 1-6: Metro Water District Policy Goals Section 2: Existing Water Supply and Treatment Conditions Figure 2-1: Chattahoochee Basin Withdrawals and Discharges for Section 3: Water Demand Forecasts Figure 3-1: Water System Diagram Figure 3-2: 2006 Adjusted Municipal Water Use by County (AAD-MGD) Figure 3-3: Metro Water District Water Use Profile (AAD-MGD) Figure 3-4: Toilet Fixture Estimates by County, Year Figure 3-5: Water Use Model Methodology Figure 3-6: Forecast of Baseline and Without Conservation Demands Section 4: Water Conservation Analysis Figure 4-1: Evaluation Process of Water Conservation Measures Figure 4-2: Present Value of the Three Water Conservation Option Packages Figure 4-3: Metro Water District Annual Average Day Water Demand Forecasts ( ) Figure 4-4: Metro Water District Overall Per Capita Water Use Trends ( ) Figure 4-5: Comparison of Baseline and Plan with Conservation between 2003 and 2009 Plans Section 6: Water Supply Sources Figure 6-1: Metro Water District Demand and Supply Forecasts Figure 6-2: Comparison of Future Water Supplies to Meet Demands Figure 6-3: Surface Water Supply Sources Identified to Meet 2035 Demands Figure 6-4: Additional Potential New Surface Water Supply Sources for the Metro Water District (Post-2035) Section 10: Water Resources Issues Figure 10-1: Chattahoochee Basin Withdrawals and Discharges for vi

11 LIST OF TABLES Executive Summary Table ES-1: Metro Water District Percent Permitted Monthly Average Available Water Supply by Basin... ES-3 Table ES-2: Summary of Existing Net Interbasin Transfers... ES-3 Table ES-3: Summary of 2035 Net Interbasin Transfers... ES-8 Section 1: Introduction Table 1-1: MetroWater District Local Jurisdictions Section 2: Existing Water Supply and Treatment Conditions Table 2-1: Existing Municipal Permitted Surface Water Supplies (2006) Table 2-2: Planned Reservoirs Table 2-3: Planned Storage Table 2-4: Existing Permitted Groundwater Supplies Table 2-5: Summary of Existing Interbasin Transfers Table 2-6: Existing Surface Water Treatment Plants Table 2-7: Non-municipal Permitted Withdrawals Section 3: Water Demand Forecasts Table 3-1: Population and Employment Forecasts by County Table 3-2: Adjusted Base Year Water Use Profile by County Table 3-3: Single Family Water End Uses (AWWARF) Table 3-4: Natural Plumbing Fixture Conversion Table 3-5: 2035 Water Demand Forecasts by County Table 3-6: 2050 Population and Demand Forecasts Section 4: Water Conservation Analysis Table 4-1: Existing Water Conservation Measures in Metro Water District in 2003 Plan, as amended Table 4-2: District-Wide Results of Conservation Measures Evaluation Table 4-3: Descriptions of the Conservation Measures Evaluated Quantitatively and Qualitatively Table 4-4: District-wide Results of Option Packages Evaluation Table 4-5: County Results of Option Packages Evaluation Table 4-6: Metro Water District 2035 Water Use Forecasts by County Table 4-7: Comparison of 2003 Plan and this Plan Update Section 5: Water Conservation Program Table 5-1: Water Conservation Tiered Rate Structure (Example) Table 5-2: Minimum Local Education and Public Awareness Program Annual Requirements Table 5-3: Optional Education Toolbox Section 6: Water Supply Sources Table 6-1: Surface Water Supply Sources Through Table 6-2: Summary of 2035 Interbasin Transfers vii

12 Table 6-3: Chattahoochee River Basin Other Potential Surface Water Supply Sources (Post-2035) Table 6-4: Coosa River Basin Other Potential Surface Water Supply Sources (Post-2035) Table 6-5: Flint River Basin Other Potential Surface Water Supply Sources (Post-2035) Table 6-6: Ocmulgee River Basin Other Potential Surface Water Supply Sources (Post-2035) Table 6-7: Tallapoosa River Basin Other Potential Surface Water Supply Sources (Post-2035) Section 7: Potential Source Evaluation Table 7-1: Water Reuse Terminology Section 8: Planned Water Supply Facilities Table 8-1: Planned Water Supply Reservoirs in the Metro Water District Table 8-2: Planned New Water Treatment Plants in the Metro Water District Table 8-3: Water Treatment Plants Planned to be Expanded before Table 8-4: Proposed Surface Water Treatment Plants Section 9: Local Water Planning Table 9-1: Recommended Formula for Calculating Water System Interconnection Reliability Target (IRT) Section 12: Education and Public Awareness Table 12-1: Education Focus for Target Audiences Table 12-2: Educational Materials Available to Local Governments by the Metro Water District Table 12-3: Minimum Local Education and Public Awareness Program Annual Requirements Table 12-4: Example Water Supply and Water Conservation Education / Outreach and Public Participation / Involvement Activities Table 12-5: Water Supply and Water Conservation Education and Public Awareness Resources Section 13: Implementation Plan Table 13-1: Local Water Provider Implementation Schedule Table 13-2: Regional Agency Implementation Schedule Table 13-3: State Agency Implementation Schedule Table 13-4: Unit Cost Estimates for Water Supply Treatment Facilities Table 13-5: Estimated Annual Water Supply and Water Conservation Management Plan Implementation Cost by Program Category Section 14: Future Plan Evaluation Table 14-1: Summary of Plan Elements to Be Reviewed and Updated Regularly by the Metro Water District viii