VI. Sources of Data for Calculating Line Extension Allowances
A. Positions of Parties
PG&E
PG&E proposes to use the same sources of data as was used in the past with one exception. For electric usage, PG&E proposes to use annual distribution revenue divided by the number of customers rather than usage data from DOE. For gas, it proposes to continue using DOE usage data.
SCE
SCE proposes to rely on information from its GRC or other base rate proceedings to calculate net revenues, and on information in Rule 2 of its tariffs as the basis for the COS factor.17
SDG&E
SDG&E recommends continued use of data from Commission decisions in ratemaking proceedings and RASS for gas.
B. Discussion
Changes to line extension allowances are routinely done through advice letter filings. Such filings are intended to be as non-controversial as possible. Therefore, the data used to calculate the allowances should have been previously adopted by the Commission or derived from such data.18 Other possible sources may include recorded data or data adopted by other state or federal agencies.
17 SCE's Rule 2, among other things, specifies monthly ownership charges for facilities other than standard facilities SCE would normally install.
18 Note that we adopt use of RASS herein.
