Washington Administrative Code
Title 480 - Utilities and Transportation Commission
Chapter 480-85 - Electric and natural gas cost of service
Section 480-85-050 - Cost of service study inputs
Universal Citation: WA Admin Code 480-85-050
Current through Register Vol. 24-06, March 15, 2024
(1) The rate schedule usage data for any cost of service study must come from the best available source: Advanced metering technology, including advanced metering infrastructure (AMI) and advanced meter reading (AMR); or, a load study.
(a) For utilities with AMI, the use of
data from a load study must be explicitly justified.
(b) For utilities with AMR, data from AMR may
be used if granularity of the data meets or exceeds hourly for electric and
daily for natural gas. For utilities with AMR with the data granularity
required by this subsection, the use of data from a load study must be
explicitly justified.
(c) For
utilities with other advanced metering technology, data from that metering
technology may be used if granularity of the data meets or exceeds hourly for
electric and daily for natural gas. For utilities with other advanced metering
technology with the data granularity required by this subsection, the use of
data from a load study must be explicitly justified.
(d) For utilities that do not have advanced
metering technology described in subsection (1), (2), or (3) of this section, a
load study must be used. Data from special contracts may be used in a load
study.
(e) Street lighting
schedules may be estimated and, if so, the estimation method must be explicitly
presented in testimony and exhibits.
(2) Rate schedule usage data for any cost of service study must not be older than five years.
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