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Regional Water Facilities Master Plan December 2002

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Regional Water Facilities Master Plan December 2002 Draft Regional Water Facilities Master Plan December 2002 Draft Regional Water Facilities Master Plan prepared by San Diego County Water Authority Engineering Department December 2002 4677 Overland Avenue San Diego, California 92123 http://www.sdcwa.org Acknowledgements San Diego County Water Authority Engineering Water Resources John Economides Ken Weinberg Richard Pyle Paul Gebert Jennifer Nakayama Tim Bombardier Tim Suydam Bob Yamada Gardenia Gomez Larry Purcell Rachel Loring Kelley Gage Aaron Rouch Dana Friehauf Terry Walech Jeff Ciccone John Balha Operations and Maintenance General Manager’s Office Bryan Troupe Lee Willer Joe Wegand Imported Water Public Affairs Scott Willett Donna Nenow Dave Fogerson Patty Brock Administrative Services General Counsel Matthew Brown Daniel Hentschke Clint Garrison Finance Right of Way Jim Munson George Brady Mark Delin Outside Consulting Services Engineering Consulting Services Montgomery Watson Harza Bill Moser Confluence Model Modifications Imported Supply Reliability Model Gary Fiske & Associates A&N Technical Services Gary Fiske Tom Chesnutt Pete Swartz Technical Publication Services Lyrica Melissa Osborne Member Agencies of San Diego County Water Authority CMWD Carlsbad Municipal Water District Del Mar City of Del Mar Escondido City of Escondido Fallbrook PUD Fallbrook Public Utility District HWD Helix Water District National City City of National City Oceanside City of Oceanside OMWD Olivenhain Municipal Water District OWD Otay Water District PDMWD Padre Dam Municipal Water District Pendleton Pendleton Military Reservation Poway City of Poway RMWD Rainbow Municipal Water District Ramona MWD Ramona Municipal Water District Rincon del Diablo MWD Rincon del Diablo Municipal Water District San Diego City of San Diego SBID South Bay Irrigation District SDWD San Dieguito Water District SFID Santa Fe Irrigation Irrigation District VCMWD Valley Center Municipal Water District VID Vista Irrigation District VWD Vallecitos Water District Yuima Yuima Municipal Water District Other Water Agencies SWA Sweetwater Authority Metropolitan Metropolitan Water District of Southern California DRAFT DECEMBER 2002 Table of Contents Chapter 1 Chapter 2 Introduction Study Methodology Authority Mission............................... 1-1 Water Facilities Master Planning Process ................................ 2-1 Legislative Mandate ........................... 1-1 Water Facility Planning: a Reliability-Based Approach ............. 2-2 Authority Background ........................ 1-1 History ......................................................... 1-1 Master Plan Approach to Service Area ............................................... 1-2 Determining Facility Requirements .................................... 2-3 Member Agencies ...................................... 1-2 Water Demand ........................................... 2-4 Population ................................................... 1-2 Water Supplies ........................................... 2-4 Water Delivery System .............................. 1-2 Description of Confluence™ Model........ 2-6 Master Plan Purpose and Master Plan Development ......................... 2-7 Guiding Principles............................. 1-5 Reliability .......................................... 1-5 Authority Policies............................... 1-7 Additional Board Policies .......................... 1-7 Master Plan Report ............................ 1-8 Environmental Compliance ............... 1-8 REGIONAL WATER FACILITIES MASTER PLAN TOC-1 DECEMBER 2002 DRAFT Chapter 3 Future Supplies and the CALFED Bay-Delta Program ..................... 4-7 Water Demand Firm Water Supply from Metropolitan – Projections Preferential Right to Water ........................ 4-8 The Authority-IID Water Conservation and Transfer Agreement ........................... 4-8 Current and Historic Future Supplies ............................................ 4-9 Water Demand ................................... 3-2 Other Competitive Imported Water Sources ........................... 4-9 Deterministic Demand Forecast ............................... 3-3 Local Water Resources ..................... 4-10 Demand Forecasts for Demand Management ..............................4-10 Facilities Master Plan ......................... 3-4 Surface Water ........................................... 4-12 Probabilistic M&I Forecasts ...................... 3-5 Water Recycling ....................................... 4-12 Probabilistic Agricultural Forecasts .......... 3-5 Groundwater ............................................. 4-12 Probabilistic Combined M&I and Seawater Desalination ...............................4-13 Agricultural Forecasts ................................ 3-7 Foundation for the Masgter Plan Resource Mix ............................................4-13 Analysis of Annual and Peak Demands ............................ 3-7 Reliability Analysis of Local Groundwater and Recycled Water Supplies................................. 4-14 Chapter 4 Imported Supply Variability ............ 4-17 Water Supply Analysis Imported Supply Model ......................... 4-19 Unlimited Imported Supply .................... 4-19 Imported Supply Reliability ................... 4-20 Imported Water Supplies................... 4-1 Data Infilling............................................. 4-20 Colorado River Water Supply .................. 4-2 Limited Imported Supply........................ 4-20 Reliability Issues .......................................... 4-2 Summary ................................................... 4-20 Future Supplies and California’s Colorado River Water Use Plan ................... 4-4 State Water Project..................................... 4-4 Reliability Issues .......................................... 4-4 Environmental Considerations ..................... 4-5 Water Quality Considerations ....................... 4-5 Current Supplies ........................................... 4-7 TOC-2 TABLE OF CONTENTS DRAFT DECEMBER 2002 Chapter 5 San Diego Formation Aquifer Storage and Recovery Feasibility Study ................... 5-14 Assessment of the Regional System: Analysis of Baseline System ............. 5-15 Baseline Condition Overall Reliability .....................................5-17 Treatment Facilities .................................. 5-19 Conveyance System ..................................5-21 Existing Facilities ............................... 5-1 First Aqueduct ............................................ 5-1 Second Aqueduct ....................................... 5-4 Reach from Metropolitan Delivery Chapter 6 Point to Twin Oaks Valley Diversion Structure5-4 Facility Options Reach from Twin Oaks Valley Diversion Structure to Miramar Vents .......................... 5-5 Reach from Miramar Vents to Miramar WTP ............................................. 5-5 Rehabilitation of Existing Facilities ............................... 6-2 Reach from Miramar WTP to Alvarado WTP ............................................. 5-5 Reach from Alvarado WTP to Expand Internal System Capacity ...... 6-2 Lower Otay Reservoir ................................... 5-6 Flow Regulatory Storage............................ 6-4 Treatment Plants......................................... 5-6 Hubbard Hill Terminal Structure ................. 6-4 Slaughterhouse Terminal Structure ................ 6-4 Planned Improvements ................................... 5-6 North County FRS ....................................... 6-4 Mission Trails FRS II ................................. 6-4 Capital Improvement Program................. 5-6 Treated FRS – Twin Oaks Valley Diversion Emergency Storage Project ......................5-11 Structure ....................................................... 6-8 System Condition Assessment — Projects to Increase Regional Aqueduct Protection Program (APP) ......5-11 Untreated-Water Conveyance Capacity ... 6-8 Related Studies ......................................... 5-12 Convert LMSE to Untreated Water........... 6-10 Crossover Pipeline No. 2 .............................. 610 Urban Water Management Plan ................ 5-12 Convert Pipeline 3 from Twin Oaks Valley Groundwater Storage and Recovery Studies 5-13 Diversion Structure to Miramar Vents ........ 6-10 Lower San Luis Rey River Valley Reconfigure Pipelines from Groundwater Storage and Recovery Miramar Vents to Highway 52 .................. 6-10 Feasibility Study ........................................ 5-13 New Pump Station at Lower Otay Reservoir for Delivery of Untreated Water to Pipeline 3 .................................................. 6-15 New Pump Station at Sweetwater Reservoir for Delivery of Untreated Water to Pipeline 3 .................................................. 6-15 REGIONAL WATER FACILITIES MASTER PLAN TOC-3 DECEMBER 2002 DRAFT Additional Water Additional Seasonal/ Treatment Capacity.......................... 6-15 Carryover Storage............................ 6-41 Projects to Supplement Moosa Canyon Reservoir ........................ 6-42 Treated-Water Aqueducts .........................6-17 Expansion of Existing San Treated Water from Vicente Reservoir ..................................... 6-42 Escondido–Vista WTP .............................. 6-18 Groundwater Projects .............................. 6-43 Treated Water from Oceanside’s Weese WTP............................. 6-23 New Conveyance and Supply ........... 6-44 Treated Water from Olivenhain WTP ........ 6-23 Treated Water from Miramar WTP
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