Minimum Data Requirements for Utility
General Rate Case Application and Testimony

The Water Action Plan adopted on December 15, 2005 includes four principles: (1) safe high quality water; (2) highly reliable water supplies; (3) efficient use of water; and (4) reasonable rates and viable utilities. In order to ensure that Class A water utilities adhere to the four principles as well as providing sufficient information to promote sound decision-making, the following information must be included in the utility's Results of Operations Report when a GRC is filed. Testimony served concurrently with the GRC application must include data responsive to the specific topics and questions listed below. The application and testimony need not respond to the Minimum Data Requirements in the order presented below, but must include a cross reference that identifies where each topic and question is addressed and the cross-reference document will become part of the formal record. When filing a multi-district GRC, the utility must provide responses both on a company aggregate and individual district basis.

I. General Rate Case Application Requirements

The application must contain the following summary information:

Compare the proposed amounts to the last adopted and last recorded amounts to determine the difference in dollars and percentages. Show the difference, i.e., the proposed change, in a table, as set out below.

Comparison Between Proposed Test Year and Last Test Year Adopted and Last Recorded Year

Proposed Test Year

 

Last Test Year

Last Recorded Year17

 

Total Rev Req $

     

Rate Base $

     

Rate Base %

     

Operating Expenses $

     

Operating Expenses %

     

Rate of Return

     

List the five most significant issues, in dollar terms that the utility believes require a rate change. Identify the cause of cost increases.

List the major controversial issues included in the GRC filing. Include the dollar impact of these issues, and a brief summary of the utility's rationale on this subject.

Include in the proposed application proposed notices to customers that will be submitted for review by the Commission's Public Advisor upon filing of the proposed application. The proposed notices should describe the reasons for the requested rate change and estimated average bill changes for a typical customer in each district by customer class.

II. Testimony Requirements

All significant18 changes between last adopted figures and recorded amounts shall be explained. Forecasted amounts shall include an explanation of the forecasting method.

As part of the Results of Operation Report, all significant changes between last adopted figures and recorded amounts shall be explained. Show results of operation in summary table as specified by the Water Division. Forecasted amounts shall include an explanation of the forecasting method.22 Among other information to support the utility's request, provide the following:

As part of the Results of Operation Report, all significant changes between last adopted figures and recorded amounts shall be explained. Show results of operation in summary table as specified by the Water Division. Forecasted amounts shall include an explanation of the forecasting method. Among other information to support the utility's request, the utility shall provide the following:

All significant changes between last adopted figures and recorded amounts shall be explained. Forecasted amounts shall include an explanation of the forecasting method.24 All significant capital additions shall be identified and justified, and must include need analysis, cost comparison and evaluation, conceptual designs, and overall budget. Also include a comparison of the forecasted capital additions adopted in the last GRC and actual capital additions.

Testimony should describe how the proposed rate design promotes customer conservation and low-income water user affordability. At a minimum, the proposed rate design should include:

Workpapers are served as described in the Rate Case Plan but are not part of the proposed application. Include all supporting analysis, documentation, calculations, back-up detail, and any other information relied on but not readily available to other parties. Electronic copies of all spreadsheets or other analytical methods necessary to fully calculate the effect of any revenue requirement change on final rates should be included. All workpapers must include a table of contents, page numbering, and cross-references to issues discussed in testimony, and must be arranged in a logical fashion.

Class A Water Utilities

Rate Case Plan

Attachment 2 of 2

Minimum Data Requirements for Utility

Cost of Capital Application and Testimony

Testimony served concurrently with the cost of capital application must include data responsive to the specific topics and questions listed below, among other information necessary to support the request. The application and testimony need not respond to the Minimum Data Requirements in the order presented below, but must include a cross reference that identifies where each topic and question is addressed in the testimony. Provide responses both on a company aggregate and individual district basis as appropriate.

(END OF APPENDIX A)

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17 Use most recent 12 months of available data; revise with complete calendar year data when available.

18 A significant expense is equal to or greater than 1% of test year gross revenues.

19 Forecast customers using a five-year average of the change in the number of customers by customer class. Should an unusual event occur, or be expected to occur, such as the implementation or removal of limitation on the number of customers, then an adjustment to the five-year average will be made. Calculate customer consumption by using a multiple regression (any commonly used multiple regression software could be employed, e.g., Eviews, SAS, TSP, Excel, Lotus), based on the material in the "Standard Practice No. U-2" and the "Supplement to Standard Practice No. Utilities-25" with the following improvements: (A) Use monthly data for ten years, if available. If ten years' data is not available, use all available data, but not less than five years of data. If less than five years of data is available, the utility and DRA will have to jointly decide on an appropriate method to forecast the projected level of average consumption; (B) Use 30-year average for forecast values for temperature and rain; and (C) Remove periods from the historical data in which sales restrictions (e.g., rationing) were imposed or the Commission provided the utility with sales adjustment compensation (e.g., a drought memorandum account), but replace with additional historical data to obtain ten years of monthly data, if available.

20 Forecast water sales for all classes of customers for utilities that are under government-mandated production limitations based on that limitation and consideration of unaccounted for water and historical production reserves while under the imposed limitation. Water sales for customer classes other than residential, multifamily, and business (such as industrial, irrigation, public authority, reclaimed, and other) will be forecast on total consumption by class using the best available data.

21 Estimate test year sales revenues based on the test year sales and customer forecast. Estimate other revenues using the best available data.

22 For district and general office expenses, excluding water production related expenses, parties may forecast using traditional estimating methodologies (historical averages, trends, and specific test year estimates). In addition to any other methodology the utility may wish to use, the utility shall also present, in its workpapers, an inflation adjusted simple five-year average for all administrative and O&M expenses, with the exception of off-settable expenses and salaries.

23 The utility and DRA shall use the "New Committee Method" to forecast per customer usage for the residential and small commercial customer classes in general rate cases.

24 In addition to any other methodology the utility may wish to use, the utility shall derive the test years and attrition year estimates by taking the year-end properly recorded plant balance of the latest recorded year and adding to it the average plant additions of the last five years. The results of this methodology may be included in workpapers.

25 For example, real property subject to Water Infrastructure Improvement Act of 1995 (Pub.Util. Code §§ 789, 789.1, 790, 790.1).

26 May include a water revenue adjustment mechanism, shareholder/ratepayer conservation incentives, or other approaches.

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