Wash. Admin. Code § 480-85-040 - Minimum filing requirements
(1) All
cost of service study results must be filed in the following forms, available
from the commission: Electric cost of service template; and, gas cost of
service template. In addition, the following must be provided contemporaneously
with all cost of service studies:
(a)
Supporting testimony. All cost of service studies must be filed with supporting
testimony and exhibits. If supporting testimony or exhibits reference, discuss,
or specifically rely on data, models, calculations, or associated information
found only in the supporting work papers, the supporting testimony or exhibit
must cite to the work papers.
(b)
Supporting work papers. In addition to complying with WAC
480-07-140(6)(a)(ii),
all supporting models, calculations, data, and associated information must be
provided to the parties in a manner that allows for the verification and
modification of all of the model's inputs and assumptions. This includes:
(i) All models must be fully functional,
which requires, at a minimum, that cells are linked where possible and all
formulas are calculable. Wherever practical, all associated calculations
necessary to support the results of the study must be consolidated in the same
electronic workbook file.
(ii) Any
macros in a model must be explained in a narrative. The narrative must also
identify where each macro is found in the model.
(iii) Each electronic cost of service
workbook must have an index identifying links to any external
spreadsheet.
(2) Companies that provide electric and
natural gas service must file a cost of service study for their electric and
natural gas operations. If a company providing electric and natural gas service
files a general rate case for only one of its services, the company must
apportion the common costs shared by both services in lieu of filing a cost of
service study for the service not included in the general rate case.
Notes
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