20170829Avista to Sierra Club 2-1, 2-5.pdf

AVISTA CORPORATION RESPONSE TO REQUEST FOR INFORMATION JURISDICTION: IDAHO DATE PREPARED: 08/18/2017 CASE NO: AVU-E-17-01/AVU-G-17-01 WITNESS: Clint Kalich
REQUESTER: Sierra Club RESPONDER: James Gall TYPE: Production Request DEPARTMENT: Energy Resources REQUEST NO.: Sierra Club: 2-1 TELEPHONE: [phone]
REQUEST: Please provide the AURORA-model projected annual energy production and capacity factors for Colstrip Units 3 and 4 for each scenario modeled in Avista’s 2011, 2013, 2015, and 2017 Integrated Resource Plans (IRPs). Please provide these projections in a
machine-readable format such as a Microsoft Excel workbook. RESPONSE:
Please see Avista's response 2-1C, which contains TRADE SECRET, PROPRIETARY or CONFIDENTIAL information and exempt from public view and is separately filed under IDAPA 31.01.01, Rule 067 and 233, and Section 9-340D, Idaho Code.
The Colstrip 3 & 4 annual output is provided in SC_DR_2-1C Confidential Attachment A where
Avista still has the data available.
AVISTA CORPORATION RESPONSE TO REQUEST FOR INFORMATION JURISDICTION: IDAHO DATE PREPARED: 08/17/2017 CASE NO: AVU-E-17-01/AVU-G-17-01 WITNESS: Clint Kalich
REQUESTER: Sierra Club RESPONDER: James Gall TYPE: Production Request DEPARTMENT: Energy Resources REQUEST NO.: Sierra Club: 2-2 TELEPHONE: [phone]
REQUEST: Please provide the actual annual capacity factors for Colstrip Units 3 and 4 for the years 2011 through 2017 (to date). Please provide these projections in a machine-readable format such as a Microsoft Excel workbook.
RESPONSE:
The Company’s share of Colstrip 3 & 4 had the capacity factors as shown in the table below.

2011 73.7% 2012 76.9%
2013 63.1%
2014 75.3%
2015 86.9%
2016 74.7%
2017 61.6%

AVISTA CORPORATION RESPONSE TO REQUEST FOR INFORMATION JURISDICTION: IDAHO DATE PREPARED: 08/17/2017 CASE NO: AVU-E-17-01/AVU-G-17-01 WITNESS: Clint Kalich
REQUESTER: Sierra Club RESPONDER: James Gall TYPE: Production Request DEPARTMENT: Energy Resources REQUEST NO.: Sierra Club: 2-3 TELEPHONE: [phone]
REQUEST: Please provide Avista’s annual usage, in MWh, of the output of Colstrip Units 3 and 4 from 2011 through 2017 (to date.) Please provide these projections in a machine-readable format such as a Microsoft Excel workbook.
RESPONSE:
The Company’s share of Colstrip 3 & 4 had the MWh as shown in the table below.

2011 1,432,719 2012 1,498,987
2013 1,227,151
2014 1,464,025
2015 1,689,986
2016 1,455,836
2017 718,895

AVISTA CORPORATION RESPONSE TO REQUEST FOR INFORMATION JURISDICTION: IDAHO DATE PREPARED: 08/25/2017 CASE NO: AVU-E-17-01/AVU-G-17-01 WITNESS: Karen Schuh
REQUESTER: Sierra Club RESPONDER: David Machado TYPE: Production Request DEPARTMENT: State & Federal Regulation REQUEST NO.: SC - 2-5 TELEPHONE: [phone]
REQUEST: Please provide Avista’s most recent (2013) depreciation study, along with documents and workpapers supporting the depreciable plant balances as of December 31, 2011, as referenced in the testimony of Karen Schuh, p.10 at 16.
RESPONSE:
The direct testimony of Karen Schuh states; at page 10, lines 14-18; “The depreciation rates
approved by the Commission were developed from a study based on depreciable plant balances at December 31, 2011 for Transportation assets and December 31, 2010 for all other assets [Emphasis added for clarification]. SC_PR_2-5 Attachment A includes Avista’s most recent completed depreciation study, with plant
balances as of December 31, 2010 for all non-transportation assets. SC_PR_2-5 Attachment B includes Avista’s most recent completed depreciation study for transportation assets (as of December 31, 2011).
AVISTA CORPORATION RESPONSE TO REQUEST FOR INFORMATION JURISDICTION: IDAHO DATE PREPARED: 08/17/2017 CASE NO: AVU-E-17-01/AVU-G-17-01 WITNESS: Clint Kalich
REQUESTER: Sierra Club RESPONDER: James Gall TYPE: Production Request DEPARTMENT: Energy Resources REQUEST NO.: Sierra Club: 2-4 TELEPHONE: [phone]
REQUEST: Please provide Avista’s marginal and levelized per-MWh cost for output from Colstrip Units 3 and 4 by year for the years 2011 – 2017. Please provide Avista’s projected marginal and levelized per-MWh cost for output from Colstrip Units 3 and 4 for 2018
and 2019. RESPONSE:
Please see Avista's response 2-4C, which contains TRADE SECRET, PROPRIETARY or CONFIDENTIAL information and exempt from public view and is separately filed under IDAPA 31.01.01, Rule 067 and 233, and Section 9-340D, Idaho Code.
Avista does not calculate historical levelized costs for any of its generating resources. The only
historical costs the company prepares is the Fuel and O&M cost per MWh calculation for the FERC Form 1 shown in the confidential table included in SC_PR_2-4C. Avista does estimate total costs in its 2017 IRP, these costs are levelized based on the projected dispatch of the plant and also shown in SC_PR_2-4C. The incremental cost is provided below.