UWM Plan - Municipal Water District of Orange County

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water at the retail level. The prorated amount of allocation is referred to as the Retail Impact Adjustment Allocation. For agencies that are 100 percent dependent on MWDOC, this method will result in an allocation of MWDOC supplies that, at the retail level, will result in a shortage equal to the Regional Shortage Percentage. This adjustment is only applied when the regional shortage levels are 15 percent (level 3) or greater. Table 4.3 below illustrated the maximum adjustment an agency may receive according to the regional shortage level. Table 4.3 Retail Impact Adjustment Regional Shortage Level Regional Shortage Percentage Retail Impact Adjustment Maximum 1 5% 0.0% 2 10% 0.0% 3 15% 7.5% 4 20% 10.0% 5 25% 12.5% 6 30% 15.0% 7 35% 17.5% 8 40% 20.0% 9 45% 22.5% 10 50% 25.0% Unfortunately, the Retail Impact Adjustment MWDOC receives from MET may be less than the total retail impact adjustment for its client agencies. To mitigate this difference, MWDOC decreased each client agency’s retail impact adjustment according to their prorated share. However, in doing so the model ensures that no MWDOC client agency falls below the Wholesale Minimum Allocation Percentage Level, as illustrated in Table 4.2. Conservation Demand Hardening Credit: The Conservation Demand Hardening Credit is used to address the increased difficulty in achieving additional water savings at the retail level due to implementation of conservation. The credit is calculated by multiplying an agency’s quantified conservation savings (in acre-feet) by its estimated retail shortage percentage prior to applying the credit. Each agency’s quantified conservation savings is calculated from a combination of the following categories: • Active Conservation – The water savings from Water-Use Efficiency devices according to the most recent year data available (year 2006 is currently used within the model). MWDOC’s database determines the amount of active conservation each client agency has saved. • Passive Conservation – The water savings from code-based savings in new development and natural replacement of devices. A two-part calculation was used to determine each client agency’s passive conservation savings. New development savings were determined by calculating the increase in retail service connections within each client agency’s service area for the years 1993 MWDOC Water Supply Allocation Plan Page 13
to 2008; in order to incorporate the year that new plumbing codes were established. Natural replacement savings were calculated by prorating each agency’s share of existing service connections for the year 1993; prior to new plumbing codes. • System Losses –The water savings from reduced system flows as a result of conservation. This credit is prorated over the savings from the previous two categories. A detailed description of each client agency’s conservation savings and its method of calculation are shown in Appendix D. Retail Water Rate Conservation: An additional credit will be given to those agencies that have a conservation rate structure. To qualify, a retail agency’s rate structure must have at least two tiers of volumetric rates, with a price differential between the bottom and top tiers of at least 10 percent. Retail agencies must submit a report of the percentage of their total service area retail demand that is covered by a qualifying water rate structure to MWDOC prior to allocation implementation. Upon verification of the report by MWDOC and MET, the client agency will be given a credit of 0.5 percent of covered Base Period Retail Demand to be added to the Base Period Conservation estimate listed above. Step 5 – Sum Total Allocations and Calculate Retail Reliability This is the final step in calculating an agency’s total allocation for imported supplies. The model sums an agency’s total imported allocation with all of the adjustments and credits and then calculates each agency’s retail reliability compared to its Allocation Year Retail Demand. Total Metropolitan Allocation: The allocation of imported supplies to an agency for its Municipal and Industrial retail demand is the sum of the Wholesale Imported Minimum Allocation, their Retail Adjustment, their Conservation Demand Hardening Credit, and IAWP Allocation (if applicable). Interim Agricultural Water Program (IAWP) Allocation: In late 2008, the MET Board took action to phase out the IAWP. In doing so, the Board allowed participants in the program the options to either remain in the program until 2012 or opt-out with certain provisions. One such provision, as it relates to the allocation plan, is if an agency optsout, their IAWP baseline would be added to their imported baseline, after the growth adjustment has been applied. If an agency remains in the IAWP, their IAWP allocation will decrease according to the regional shortage level as illustrated below in Table 4.4 Table 4.4 Interim Agricultural Water Program Allocation MWDOC Water Supply Allocation Plan Page 14
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Municipal Water District of Orange
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Table of Contents Contents Executiv
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Table of Contents 6. Recycled Water
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Table of Contents List of Figures F
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Acronyms GAC GAP GMFP GPCD gpm GRF
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Message from the Board of Directors
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Executive Summary • Offer opportu
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Executive Summary When comparing su
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Executive Summary • Promoting par
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1. Introduction 1.1. Urban Water Ma
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Section 1 Introduction • Long-ran
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Section 1 Introduction term by vote
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Section 1 Introduction For more tha
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Section 1 Introduction Orange Count
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Section 2 Water Demand 600,000 2.5
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Section 2 Water Demand Table 2-1: C
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Section 2 Water Demand used to fill
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Section 2 Water Demand Baseline and
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Section 2 Water Demand o 10 percent
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Section 2 Water Demand These target
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Section 2 Water Demand under SBx7-7
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Section 2 Water Demand Legislation
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3. Water Sources and Supply Reliabi
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Section 3 Water Sources and Supply
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State Water Project Programs and Lo
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3.3.8. Recharge Facilities for OCWD
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4. Demand Management Measures 4.1.
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4.2. BMP Implementation in MWDOC Se
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Section 4 Demand Management Measure
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4.2.4. DMM 4: Metering with Commodi
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Section 5 Water Supplies Contingenc
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6. Recycled Water 6.1. Agency Coord
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Section 6 Recycled Water outfalls a
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Section 6 Recycled Water IRWD’s r
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Section 6 Recycled Water IRWD Los A
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Section 6 Recycled Water OCWD Groun
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6.4.2. Indirect Potable Reuse Secti
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7. Future Water Supply Projects and
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Section 7 Future Water Supply Proje
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Section 8 UWMP Adoption Process Thi
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Section 8 UWMP Adoption Process Cit
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Page 157 and 158: CALIFORNIA WATER CODE DIVISION 6 PA
Page 159 and 160: and county, city, regional agency,
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Page 167 and 168: service area at the end of 5, 10, 1
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Page 171 and 172: "Memorandum of Understanding Regard
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Page 175 and 176: Table 1. Per-Capita Retail Water Us
Page 177 and 178: Appendix C California Urban Water C
Page 179 and 180: Agency: Municipal Water District of
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Page 187 and 188: Calif. Water No. UWMP requirement a
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Page 197 and 198: Section 2: Metropolitan Water Distr
Page 199 and 200: Section 3: Development Process In p
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Page 203 and 204: Base Period Interim Agricultural Wa
Page 205: Shortage Levels: The model allocate
Page 209 and 210: Section 5: Plan Implementation This
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Page 213 and 214: Tracking and Reporting In preparing
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Page 217 and 218: Appendix A List of Acronyms: AF- Ac
Page 219 and 220: Appendix C MWDOC Growth Adjustment
Page 221: Appendix F Letters of Notification
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Appendix H Resolution of Adoption o
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8001 Irvine Center Drive, Suite 110
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UWM Plan - Municipal Water District of Orange County

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