VALLECITOS WATER DISTRICT WATER, WASTEWATER, AND RECYCLED WATER MASTER PLAN. November 2010

Transcription

1 VALLECITOS WATER DISTRICT WATER, WASTEWATER, AND RECYCLED WATER MASTER PLAN

2

3 VALLECITOS WATER DISTRICT WATER, WASTEWATER, AND RECYCLED WATER MASTER PLAN Prepared For: Vallecitos Water District 201 Vallecitos de Oro San Marcos, CA Prepared By: 9275 Sky Park Court, Suite 200 San Diego, CA PBS&J Project No.: Jennifer M. Duffy, P.E. Project Manager 3/31/11

4

5 Table of Contents CHAPTER PAGE Chapter 1.0 INTRODUCTION Historic Background Current District Issues Previous Planning Documents Authorization Scope of Work and Objectives Study Area Overview Chapter 2.0 LAND USES Land Use Data Existing and Planned Land Uses Phasing Chapter 3.0 WATER SYSTEM PLANNING CRITERIA Water System Unit Demands Water System Peaking Water Distribution System Criteria Chapter 4.0 WATER SUPPLY Introduction Existing Supply Evaluation Criteria for New Supply Options Evaluation of Possible New Supply Projects Analysis Overview of District Water Conservation Programs Chapter 5.0 POTABLE WATER DISTRIBUTION SYSTEM Water System Inventory Water Demands Hydraulic Model Development Water System Analysis Recommended Potable Water System Improvements Chapter 6.0 WASTEWATER PLANNING CRITERIA Wastewater Generation Rates Wastewater System Peaking Wastewater Collection System Criteria i Vallecitos Water District Master Plan

6 Table of Contents Chapter 7.0 WASTEWATER SYSTEM Wastewater Collection System Description Wastewater Treatment and Major Conveyance Facilities Existing and Future Wastewater Flows Hydraulic Computer Model Development and Calibration Wastewater System Analysis and Findings Recommended Wastewater System Improvements Chapter 8.0 PROPOSED CAPITAL IMPROVEMENT PROGRAM Development of Unit Costs Recommended CIP Program TABLES Table 2-1 VWD Land Use Acreages Table Measured Unit Water Demands Table 3-2 Unit Water Demands Table 3-3 Water Infrastructure Criteria Table 4-1 Table 4-2 Metropolitan Supply Capability(1) and Potential Reserve or Replenishment for Year 2030 Conditions (in acre feet per year (AFY)) Projected Verifiable Water Supplies for Water Authority Service Area Normal Year Conditions (in AFY) Table 4-3 Water Supply Connections Table 4-4 Summary of Potential Shortage Events and Consequences Table 4-5 Potential Recycled Water Customers Table 4-6 Planning-Level Opinion of Capital Costs Recycled Water Table 4-7 Planning-Level Opinion of Annual and Unit Cost Recycled Water Table 4-8 Planning-Level Opinion of Capital Costs Expanded Transmission Capacity from VAL 2 Connection Table 4-9 Table 4-10 Table 4-11 Table 4-12 Table 4-13 Planning-Level Opinion of Capital Costs Permanent Connection to Vista Flume via VID System Planning-Level Opinion of Annual and Unit Costs Permanent Connection to Vista Flume via VID System (Variation A Without Capacity Rights) Planning-Level Opinion of Annual and Unit Costs Permanent Connection to Vista Flume via VID System (Variation B With Capacity Rights) Planning-Level Opinion of Annual and Unit Costs Treated Water Purchases from Olivenhain WTP (Variation B With Capacity Rights) Planning-Level Opinion of Annual and Unit Costs Treated Water Purchases from Weese (Oceanside) WTP (Variation B With Capacity Rights) Table 4-14 Evaluation Summary of Supply Project Alternatives Table 4-15 Vallecitos Water District s Drought Restriction Overview Table 5-1 District Connections to the Water Authority Table 5-2 Pressure Zone and Supply Source Summary Table 5-3 Existing Pump Station Summary Table 5-4 Existing Reservoir Summary Table 5-5 Existing System Control Valves ii Vallecitos Water District Master Plan

7 Table of Contents Table 5-6 Water Distribution Pipeline Inventory Table 5-7 Emergency Interagency Connections Table 5-8 Water Authority Deliveries Table Potable Water Metered Demands by Pressure Zone Table 5-10 Unbilled Water Summary Table 5-11 Demand Projection Comparison Table 5-12 Interim Year Demand Projections by Pressure Zone Table 5-13 CIP Phasing Planning Years Table 5-14 Existing Storage Analysis Table 5-15 Existing Pump Station Capacity Analysis Table 5-16 Existing Pump Station Off-Peak Pumping Analysis Table 5-17 Storage Analysis Table 5-18 Pump Station Capacity Analysis Table 5-19 Off-Peak Pumping Analysis for Proposed 2030 Pump Stations Table 5-20 Recommended Storage Projects Table 5-21 Recommended Pump Station Projects Table 5-22 Proposed Pipeline Improvements Table 6-1 Wastewater Unit Generation Rates Table 6-2 Wastewater Infrastructure Criteria Table 7-1 Sewer Gravity Main Inventory Table 7-2 Lift Station Summary Table 7-3 EWPCF Phase V Projected Capacity Rights Table 7-4 MRF Wholesale Recycled Water Customer Agreement Conditions Table 7-5 Failsafe Pipeline Capacity Rights Table 7-6 Land Outfall Capacity Summary Table 7-7 Land Outfall Capacity Rights Table 7-8 Existing Wastewater Flow Summary Table 7-9 Projected Wastewater Flows Table Metered Sewer Flows Table 7-11 Lift Station Capacity Requirements Table 7-12 VWD Capacity Requirements at EWPCF Table 7-13 Land Outfall Peak Wet Weather Flow Conditions Table 7-14 Land Outfall Capacity and Flow Summary Table 7-15 CIP Phasing Planning Years Table 7-16 Recommended Sewer Pump Station Improvements Table 7-17 Proposed Sewer Pipeline Improvements Table 7-18 Land Outfall Capacity Summary Table 8-1 Pipeline Unit Costs Table 8-2 Water Capital Improvement Projects Table 8-3 Wastewater Capital Improvement Projects Table 8-4 Land Outfall Project iii Vallecitos Water District Master Plan

8 Table of Contents FIGURES Figure 1-1 Study Area Location Figure 1-2 Water Service Area Figure 1-3 Wastewater Service Area Figure 2-1 Existing Land Use Figure 2-2 Future Land Use Figure 2-3 SANDAG Series 11 Growth Forecast for VWD Study Area Figure 3-1 Water System Peaking Curves Figure 4-1 Water Agency Map Figure 4-2 Water Supply Figure 4-3 Carlsbad Seawater Desalinated Conveyance Figure 4-4 Recycled Water Distribution System Map Figure 4-5 VAL 2 Transmission Pipeline Figure 5-1 Existing Water System Figure 5-2 Inter-Agency and Emergency Service Connections Figure 5-3 Water Authority Delivery Trends Figure Monthly Water Authority Deliveries Figure Potable Water Demands by Meter Type Figure 5-6 Time of Day Diurnal Pattern Figure 5-7 Potable Water Hydraulic Profile Figure 5-8 Figure Reservoir Cycling Existing Minimum Day Demands No Desalinated Water Delivery Reservoir Cycling Existing Minimum Day Demands + 7,500 AFY Desalinated Water Figure 6-1 Peaking Curves for Wastewater Flows Figure 7-1 Existing Sewer System Figure 7-2 Existing Wastewater System Schematic Figure 7-3 Existing Sewer System Meter Locations Figure 7-4 Inflow and Infiltration Analysis Figure 7-5 Historical and Projected Average Annual Wastewater Flows Figure 8-1 CIP Cost Estimates per Phase EXHIBITS Exhibit 7-1 Exhibit 8-1 Exhibit 8-2 Existing Sewer Outfall System Schematic CIP Projects Water CIP Projects Sewer iv Vallecitos Water District Master Plan