20180801Avista to Staff 7 Supplemental.pdf

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Idaho Public Utilities Commission
472W. Washington St.
Boise,ID 83720-0074
Attn: Brandon Karpen
Deputy Attorney General
Re: Production Request of Commission Staff in Case No. AVU-E-18-03/AVU-G-18-02
Dear Mr. Karpen,
Enclosed is Avista's response to IPUC Staffs production request in the above referenced
dockets. Included in this mailing are the original and two paper copies of Avista's response to
production request: Staff 07 Supplemental. Also enclosed on three separate CD's are copies of
Avista's response to the production request. The electronic version of the response was emailed
on 07l3ll18.
Also included on a separate CD is Avista's CONFIDENTIAL response to PR 07C. This
response contains TRADE SECRET, PROPRIETARY or CONFIDENTIAL information and
is separately filed under IDAPA 31.01.01, Rule 067 and233, and Section 9-340D,ldaho Code.
It is being provided under a sealed separate envelope, marked CONFIDENTIAL.
If there are any questions regarding the enclosed information, please contact Paul Kimball at
[phone] or via e-mail at [e-mail]
Sincerely,
Avista Corp.
'1411 East Mission P.O. Box3727
Spokane. Washington 99220-0500
Telephone [phone]
TollFree 800-727-9170
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Paul Kimball
Regulatory Analyst
Enclosures
CC (Email)Sierra Club (Ritchie, Boyd)
IPUC (Hanian)
Clearwater (Richardson, Reading, Lewallen, Haugen)
Idaho Conservation League (Otto)
Idaho Forest Group (Miller, Williams, Crowley)
cory,
CC (Paper):Clearwater (Richardson)
AVISTA CORPORATION
RESPONSE TO REQUEST FOR INFORMATION
JURISDICTION
CASE NO:
REQUESTER:
TYPE:
REQUEST NO.:
IDAHO
AVU-E- 1 8-03/AVU-G- l 8-02
Staff
Production Request
Staff-07 Supplemental
DATE PREPARED: 07 13012018WITNESS: N/A
RESPONDER: James Gall
DEPARTMENT: Energy Resources
TELEPHONE: (s09) 49s-2189
REQUEST:
Please provide all analyses conducted or commissioned by Avista studying the economic effects of
a carbon tax imposed by the State of Washington on the continued operation of Colstrip.
RESPONSE:
Please see StafLPR_O7C SUPPLEMENTAL, which contains TRADE SECRET,
PROPRIETARY or CONFIDENTIAL information and are separately filed under IDAPA
31.01.01, Rule 067 and233, and Section 9-340D,Idaho Code.
At this time, Avista has only performed preliminary analysis of the impact of the proposed carbon
tax in the State of Washington (see attached files for the proposed tax's preliminary impact to
power supply costs). Additional analysis is currently in development and the Company will
supplement this response when complete. In this preliminary analysis, Colstrip's dispatch is
reduced to nearly 50 percent of its capability (this assumes Idaho's portion of Avista's share
continues to dispatch without a carbon tax).
SUPPLEMENTAL (July 30, 2018):
Sta[PR_07C CONFIDENTIAL Attachment A, is an updated study (summary) of the cost of the
carbon fee (I-1631) in Washington and its impacts on Avista's plants including Colstrip. An
updated study was required to separate loads and resources between Washington and Idaho due to
the fee's effect to Washington customers. Over time additional studies will be performed to
understand long term effects ofthe fee.