20171102Avista to Staff 1-4.pdf

Avista Corp.
1411 East Mission P.O.Box3727
Spokane. Washington 99220-0500
Telephone [phone]
TollFree 800-727-9170
Aftlnsrt
Corp,RECEIVED
?0lt t{0Y -2 ltt 9r l9
uTrLl?Hsodi}iffil8t'o*November 1,2017
Idaho Public Utilities Commission
472 W. Washington St.
Boise, ID 83702-0074
Attn: Daphne Huang
Deputy Attomey General
Re: Production Request of the Commission Staff in Case Nos. AVU-E-I7-10
Dear Ms. Huang,
Enclosed are Avista's responses to IPUC Staffs production requests in the above referenced
dockets. Included in this mailing are the original and two paper copies of Avista's responses to
production requests: Staff 1-4. Also enclosed on three separate CD's are copies of Avista's
responses to the production requests.
Also included both on paper and on a separate CD is Avista's CONFIDENTIAL response to PR
2C. This response contains TRADE SECRET, PROPRIETARY or CONFIDENTIAL
informationandisseparatelyfiledunderIDAPA3l.0l.0l,Rule06T and233,andSection9-340D,
Idaho 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 (509)
495-4584 or via e-mail at [e-mail]
Sincerely,
Paul Kimball
Regulatory Analyst
Enclosures
-
AVISTA CORPORATION
RESPONSE TO REQIIEST FOR INFORMATION
IDAHO
AVU-E-17-10
IPUC
Production Request
Staff - I
DATE PREPARED: r0l3ll20l7WITNESS: N/A ?01? HOY -2 Atl $ 2lRESPONDER: James Gall
DE'ARTMENT: E_,:,.ell.nr,fwHi*,b,,ffi i8r, o*TELEPHONE: (s09) 49s-2189
REC E IVE D
JUzuSDICTION:
CASE NO:
REQUESTER:
TYPE:
REQUEST NO.:
REQUEST:
Is Figure I in the Company's filing the same load and resource balance used in Avista's published
2017 IRP adjusted by the additions or cancellations of long-term contracts since the publication of
the2017 IRP? If not, please describe and quantifu the difference. Does the difference change the
first deficit year or the amount of deficiency in the first deficit year? Please explain.
RESPONSE:
No, this is an updated load and resource balance, but uses the same peak load forecast.
Unfortunately, Figure I included the incorrect peak load forecast. The chart is amended below,
Table 1 included in the filing includes correct loads. As compared to the 2017 IRP, there is no
change in deficit year. The changes since the 2017 IRP include updates to short term contracts, off
system reserve requirements, and maintenance schedules. The table below is a comparison of
December positions capacity position in megawatts between each of the load and resource balance
calculations.
Amended Figure I
1 Hour Peak Load & Resource Position
400
300
200
100
0
(100)
(200)
(300)
(400)
(500)
(600)
(700)
OO O) O tF N .L t lO (o N c(, CD O F N (v) t rO (O I\ EtF rF N N N N N N N N N (\l (A (v) (v) a!, ct (? (? (., (,oooooooooooooooooooooN N N N N N N N N N N OI N N N N N (\l N N N
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Page I of2
Ir i.trr
t
Load and Resource Balance Comparison
Year 2O17IRP AVU-E-I7-
10
Change
2018 217 228 ll
2019 187 198 11
2020 172 183 10
202t 178 188 10
2022 154 163 9
2023 r44 153 9
2024 165 173 8
2025 155 t63 8
2026 (1 36)(129\7
2027 (146)(139)6
2028 (163)(16r)2
2029 (r71)(16e)2
2030 (t7e)(177)2
2031 (264)(262)2
2032 (273)(270)2
2033 (281)(27e)2
2034 (2e0)(287)2
2035 (2e8)(2e6)2
2036 (307)(304)2
2037 (31s)(313)2
2038 (324)(321\2
Page2 of2
AVISTA CORPORATION
RESPONSE TO REQUEST FOR INFORMATTON
JURISDICTION: IDAHO
CASE NO: AVU-E-I7-10
REQUESTER: IPUCTYPE: Production Request
REQUEST NO.: Staff - 2
DATE PREPARED: l0l3ll20l7
WITNESS: N/A
RESPONDER: James Gall
DEPARTMENT: Energy Resources
TELEPHONE: [phone]t89
REQUEST:
Please provide in Excel format the load and resource balance data used in Avista's 2017 IRP
adjusted by the additions or cancelations of long-term contracts since the publication of the 2017
IRP.
RESPONSE:
Please see Avista's response 2C, which contains TRADE SECRET, PROPRIETARY or
CONFIDENTIAL information and exempt from public view and is separately filed under
IDAPA 31.01.01, Rule 067 and233, and Section 9-340D,Idaho Code.
Please see Sta[PR_2C Confidential Auachment A - Capacity Report 9.29.17 _Confidential. The
file is being provided in electronic format only.
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AVISTA CORPORATION
RESPONSE TO REQUEST FOR INFORMATION
JURISDICTION
CASE NO:
REQUESTER:
TYPE:
REQUEST NO.:
IDAHO
AVU-E-17-10
IPUC
Production Request
Staff - 3
DATE PREPARED: I0l3ll20l7WITNESS: N/A
RESPONDER: James Gall
DEPARTMENT: Power Supply
TELEPHONE: (509) 49s-2189
REQUEST:
Please provide in Excel format the load and resource balance data used to calculate the first
capacity deficiency date in Case No. AVU-E-13-10.
RESPONSE:
Please see Staff PR 3 Attachment A.F?
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AVISTA CORPORATION
RESPONSE TO REQUEST FOR INF'ORMATION
JURISDICTION:
CASE NO:
REQUESTER:
TYPE:
REQUEST NO.:
IDAHO
AVU-E-17-10
IPUC
Production Request
Staff - 4
DATE PREPARED: l0l3ll20l7WITNESS: NiA
RESPONDER: James Gall
DEPARTMENT: Energy Resources
TELEPHONE: (s09) 495-2189
REQUEST:
Please provide and explain the major drivers that cause the first capacity deficit year to move from
2020 in Case No. AVU-E-I3-10 to 2026 inthis case.
RESPONSE:
The change from 2020 to 2026 is driven by two reasons; the first is a change in the peak load
forecast. For example, in January 2026, the forecasted peak load is 1,865 MW in the
AVU-E'13-10 case, while the current forecast for the same time period is 1,743 MW. The second
major change is the extension/continuation of two contracts for power from Mid-C hydro projects,
these include contracts with Douglas County PUD and Chelan County PUD. Without these
contracts, the utility would be short in202l due to their previous expiration dates.
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