20190405PAC to IIPA Attach OPUC 6 2nd Supp.pdf

UM 1968 / PacifiCorp
April 1, 2019 OPUC Data Request 6 – 2nd Supplemental

OPUC Data Request 6
With respect to the plant decommissioning cost data used in the UM 1968 filing, please: (a) Provide the plant “Demolition and Decommissioning Costs Studies” for all Coal, Natural Gas, and Geothermal Plants included in the UM 1968 filing. (b) Fill out the table below by listing each generating unit and providing all requested information for each generating unit listed (see Exhibit PAC/202, Spanos/43).

Generating Unit Name
In Service Date
Probable Retirement Date
Study Date
Decommissioning Date

(c) Was the “DECOMMISSIONING COST” used to calculate “Weighted NS-% of Total
Ret.”? (See work paper labeled “PAC - Production Net Salvage Analysis - Oregon Plant”). Please explain how, and in your response, please provide all data references and calculations for the Oregon share of decommissioning cost. On March 14, 2019, OPUC Staff issued the following follow-up request:
Where can I find the data links for Column “D” TERMINAL and “P” INTERIM “Retirement data” in OPUC DR 6-3? (CALCULATION OF WEIGHTED NET SALVAGE PERCENT FOR GENERATION PLANT AS OF DECEMBER 31, 2017) 2nd Supplemental Response to OPUC Data Request 6 Referring to Attachment OPUC 6-3 provided with the company’s February 19, 2019 response to OPUC Data Request 6, the terminal retirements in Column 2 and the interim retirements in Column 8 were calculated using Gannett Fleming’s depreciation software
based on the current plant balances, estimated interim survivor curves, and the estimated
retirement dates of each facility from the depreciation study. The interim retirements represent the portion of current plant in service forecast to retire prior to the estimated retirement date based on the estimated interim survivor curves. The terminal retirements represent the portion of current plant in service forecast to be retired as terminal
retirements based on the estimates in the depreciation study. Both the interim and
terminal retirements are calculated by applying the estimated interim survivor curves to the current plant balances. There are no specific work papers or links for these
Despite PacifiCorp's diligent efforts, certain information protected from disclosure by the attorney-client privilege or other applicable privileges or law may have been included in its responses to these data requests. PacifiCorp did not intend to waive any applicable privileges or rights by the inadvertent disclosure of protected information, and PacifiCorp reserves its right to request the return or destruction of any privileged or protected materials that may have been inadvertently disclosed. Please inform PacifiCorp immediately if you become aware of any inadvertently disclosed information.
UM 1968 / PacifiCorp
April 1, 2019 OPUC Data Request 6 – 2nd Supplemental

calculations, as they were performed with computer software based on the retirement and
survivor ratios from the estimated interim survivor curves.
Despite PacifiCorp's diligent efforts, certain information protected from disclosure by the attorney-client privilege or other applicable privileges or law may have been included in its responses to these data requests. PacifiCorp did not intend to waive any applicable privileges or rights by the inadvertent disclosure of protected information, and PacifiCorp reserves its right to request the return or destruction of any privileged or protected materials that may have been inadvertently disclosed. Please inform PacifiCorp immediately if you become aware of any inadvertently disclosed information.