Okla. Admin. Code § 165:35-25-18

Current through Vol. 42, No. 7, December 16, 2024

Section 165:35-25-18 - Performance levels

(a)Utility's responsibility and indices used. It shall be the utility's responsibility to maintain and compile the data necessary to compute System Average Interruption Duration Index (SAIDI) and System Average Interruption Frequency Index (SAIFI) (and to the maximum extent practicable, Momentary Average Interruption Frequency Index (MAIFI)). These indices shall be computed by the utility for each reporting year, or any sub-period thereof, as requested by PUD. The data maintained and compiled for the computation of the indices shall conform strictly to their respective definitions as set forth in this Part. The indices shall be computed for the utility's entire service territory, for each region, and for each distribution circuit. Computation of the indices shall not include interruptions that have resulted from operating conditions that are beyond the utility's control (such as a major event, as that term is defined and used under this subchapter). Each utility shall maintain the raw interruption and duration date as well as the computation of the indices for each reporting year, for a period of not less than three years after the annual report filing deadline. The utility shall maintain all data necessary to compute SAIDI and SAIFI (and to the maximum extent practicable, MAIFI), for all major events but is not required to make such computations except as requested by PUD.

(b)Minimum performance level. Upon receipt of the utility's annual report, PUD will compare the indices computed for the utility's service territory to the minimum performance level. The minimum performance level shall represent the lower threshold of adequate service below which further review, analysis, and corrective action may be required. The minimum performance levels shall be reached when the SAIDI and SAIFI values of each utility's service are equal to or better than the minimum performance levels for these indices. The base performance level for SAIDI and SAIFI for the period January 2005 through December 2009 shall be established through engineering and economic studies of historical performance and system operations prepared by each utility, in consultation with PUD Staff, and submitted as part of each utility's reliability report submitted March 1, 2005. This base performance level shall be recomputed by each utility every fifth (5^th) year and submitted to PUD in the next year's reliability report. After notice and hearing, the Commission may modify the minimum performance level of any utility. The minimum performance level for a utility with less than 100,000 customers shall be adjusted to account for variances in the rural nature or other special characteristics of their distribution system. The adjusted minimum performance level for a utility with less than 100,000 customers shall be determined by multiplying the annual minimum performance level by the ratio of miles of line per customer plus 1 for the reporting year. It will be the responsibility of the utility to determine the adjusted minimum performance level using this formula for each reporting year. The utility's average number of customers for the prior reporting year shall determine the standards to be applied to the current reporting year.

(c)Objective performance level. The objective performance level shall represent a fully adequate level of service that each utility should strive to achieve and maintain. It shall be reached when the SAIDI and SAIFI values of each utility's service territory are for the year is within the bandwidth established based on the data gathered pursuant to the process described in OAC 165:35-25-18(b). If the reporting utility does not achieve the base performance level as outlined in 165:35-25-18(b) and/or the minimum performance level, as set by the Commission, for any two years of a three-year period, then the utility shall provide an explanation of the steps the utility is taking to improve SAIDI and SAIFI. The utility shall include its reliability improvement plan within its annual report submitted to the PUD and shall be submitted no more than fourteen (14) months after its second occurrence of failing to achieve the minimum performance level.

(d)Commission Review. In its review of a utility's cost of service and rate of return, the Commission may consider, in general rates cases, the utility's reliability reporting and levels for SAIDI, SAIFI, Customer Average Interruption Duration Index (CAIDI), and MAIFI.

(e)Limitations to technology. Utilities that do not have the technological capability to maintain and compile all such data, shall maintain and compile such data that it has available and utilizes to define and identify system reliability levels as well as outline progress towards attainment of additional technologies.

Okla. Admin. Code § 165:35-25-18

Added at 21 Ok Reg 2091, eff 7-1-04

Amended by Oklahoma Register, Volume 31, Issue 24, September 2, 2014, eff. 9/12/2014

Amended by Oklahoma Register, Volume 36, Issue 21, July 15, 2019, eff. 7/25/2019

Amended by Oklahoma Register, Volume 41, Issue 23, August 15, 2024, eff. 10/1/2024