Notice of Scheduling.pdf

Office of the Secretary
Service Date
March 14, 2001
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF THE PETITION OF
AVISTA CORPORATION DBA AVISTA
UTILITIES—WASHINGTON WATER POWER
DIVISION (IDAHO) FOR PROPOSED
MODIFICATIONS TO THE POWER COST
ADJUSTMENTS (PCA) METHODOLOGY.
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CASE NO. AVU-E-01-01

NOTICE OF MODIFIED
PROCEDURE

NOTICE OF COMMENT/
PROTEST DEADLINE

NOTICE OF ADDITIONAL
SCHEDULING

ORDER NO. 28673

BACKGROUND
On January 16, 2001, Avista Corporation dba Avista Utilities—Washington Water
Power Division—Idaho (Avista; Company) filed an Application with the Idaho Public Utilities
Commission (Commission) seeking approval of proposed modifications to its existing Power Cost
Adjustment (PCA) mechanism. As justification for its proposed changes, the Company states that
the cost of short-term power purchases has risen to unprecedented levels. The rising short-term
market price for electric energy, the Company states, has resulted in a situation where Avista is
forced to purchase power at prices that are higher than the price received when the power is sold to
meet increased retail and wholesale system load requirements being experienced by the Company.
The power supply expenses associated with meeting increased system load requirements, the
Company notes, are not included in the PCA mechanism. The Company proposes to correct this
omission.
Short-term market prices, the Company states, have also created a situation where a
forced outage at either the Colstrip or the Kettle Falls generating plant would result in extremely
high replacement costs. Power supply expenses associated with thermal plant forced outages, the
Company notes, are not included in the current PCA mechanism. The Company proposes to correct
this omission.

NOTICE OF MODIFIED PROCEDURE
NOTICE OF COMMENT/ PROTEST DEADLINE
NOTICE OF ADDITIONAL SCHEDULING
ORDER NO. 28673 1
The amendments to the PCA deferral mechanism requested by the Company in greater
detail are as follows:
• Changes in system load requirements
The cost of power to serve changes in system load requirements is not included as part
of the PCA mechanism. The Company contends that this cost is substantial and needs to be
reflected in the PCA mechanism.
System load requirements, the Company states, have been impacted by increases in
both retail and wholesale loads. Retail loads have increased due to load growth and colder than
normal weather. Changes in wholesale loads have also impacted the amount of power that needs to
be purchased. Wholesale loads are impacted by the expiration of both purchase and sale contracts
and by increased takes under contracts because of the high short-term market prices.
Holding system load requirements to levels from the last general rate case in the
existing PCA mechanism, the Company states, must be changed.
• Actual thermal generation.
The current PCA mechanism models the amount of Colstrip and Kettle Falls thermal
generation based on the short-term market price of power for the month and the incremental
operating cost of the unit. Power supply expenses associated with thermal plant forced outages, the
Company states, are not included in the current PCA mechanism because the mechanism is based
on modeled rather than actual generation.
• Calculation of costs for deferral.
The power costs for deferral purposes under the existing PCA mechanism are limited to
the effect of short-term market prices on short-term transactions, Rathdrum turbine generation and
fuel cost, hydro electric generation, the modeled impact of thermal generation and PURPA
contracts. The Company is proposing to amend the PCA mechanism to include the impact of
changes in retail and wholesale system load requirements and changes in actual thermal generation.
Specific power supply accounts included for deferral purposes under the amended PCA mechanism
would include Account 447—Sales for Resale, Account 501—Fuel (thermal), Account 547—Fuel
(combustion turbine), and Account 555—Purchased Power. Deferred costs would be based on the
difference between the actual revenues and expenses recorded in these accounts, and the normalized
level for these accounts approved by the Commission in the last general rate case.

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ORDER NO. 28673 2

• Centralia
The Centralia steam generating plant is included in the PCA based on fixed levels of
“authorized” generation and “authorized” fuel costs. In May 2000 Centralia was sold. The
Company is proposing to modify the PCA to reflect the elimination of Centralia generation and fuel
costs as a result of the sale. The Company proposes to reflect a credit for Centralia operation and
maintenance expense, depreciation, taxes and return on investment as these costs no longer exist as
a result of the sale. Replacement power costs would be captured in the difference between actual
and authorized levels of costs in Account 555—Purchased Power.
• Coyote Springs 2
The Coyote Springs 2 project is a combined-cycle natural gas-fired combustion turbine
with generation output of approximately 280 MW. The project is fully licensed. Construction of
this plant began in January 2001. Completion of the project is expected in the summer of 2002.
Under the modified PCA mechanism proposed, the increase in fuel costs associated with the plant
as well as the impact on sales for resale and purchased power will be reflected in the calculation of
PCA deferral. In addition, the Company proposes to reflect a charge in the PCA mechanism for
operating and maintenance expense, depreciation, taxes and return on investment associated with
the Coyote Springs 2 project until such time as these costs are reflected in general rates.
• Portland General Electric (PGE) capacity sale
The PGE capacity contract revenues reflected in Account 447—Sales for Resale, the
Company states, will be increased to include additional amortization for ratemaking purposes so
that the total PGE contract revenue is equivalent to the revenue that would have occurred absent the
monetization of the contract. Stated differently, the monthly PCA deferrals will not be impacted by
the PGE contract monetization, because revenues will be adjusted to the level under the old contract
and that same level of revenue is reflected in the authorized amounts from the last general rate case.
• Retail Load Revenue Adjustment
Since actual system load requirements will determine the actual power supply revenues
and expenses under the Company’s proposed changes to the PCA, the Company states, that it is
appropriate to include a revenue adjustment for the difference between actual and authorized

NOTICE OF MODIFIED PROCEDURE
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ORDER NO. 28673 3
revenue in the amended PCA mechanism. Changes in wholesale sales contracts will be picked up
in the calculation of the difference between actual and authorized revenues in Account 447. A retail
revenue adjustment would be included to reflect the difference between actual and authorized retail
revenue, adjusted for distribution costs to serve load growth.
Because the Company incurs incremental delivery cost to serve new load, the Company
states it would not be appropriate to reflect the entire amount of difference between actual and
authorized retail revenue in the deferral mechanism, as a portion of increased retail revenue is offset
by increased costs to serve new load. The Company is proposing a distribution cost adjustment to
retail revenue based on increases in customers by rate schedule. The difference between actual
customers and authorized customers would be multiplied by distribution costs per customer from
the Company’s last cost-of-service study to arrive at the distribution cost adjustment.
• Risk Sharing
The Company is proposing to defer 90% of the differences described above under the
amended PCA deferral mechanism. The remaining 10% of the differences would not be deferred
and would impact earnings in the month they were incurred. The 90%/10% sharing would not be
applied to the Centralia and Coyote Springs 2 adjustments for operation and maintenance expense,
depreciation, taxes and return on investment. The 90%/10% sharing mechanism is being proposed
as an incentive for the Company to keep power supply costs as low as possible and to reflect a
sharing between customers and shareholders. The Company points out that it does not have any
influence on the short-term market price of power.
• Balancing Account Trigger
The current trigger for implementing a PCA rebate or surcharge is $3 million or about
2.5% of base revenues. Only two surcharges or rebates can be in place at one time. Two
surcharges or rebates amount to $6 million or about 5% of base revenues. The Company is
proposing to raise the limit on surcharges or rebates to $12 million or about 10% of base revenues.
The Company suggests, however, that this limit be a guideline rather than a hard and fast rule. If
circumstances arise that justify either a different trigger or limit amount, the Company proposes that
it have the flexibility to structure its request to meet the circumstances.
• Interest on Balancing Account

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ORDER NO. 28673 4
The Company proposes that the amended PCA mechanism include a calculation of
interest using the same methodology approved for calculating interest on deferred natural gas cost
balances (i.e., the customer deposit rate—reference O.N. 28624, Case No. AVU-G-00-4).
• Periodic Reporting
The Company notes that it currently provides reports to the Commission on a monthly
basis related to the deferrals and will continue to do so under the amended PCA mechanism. The
reports would include all calculations and accounting entries.

The Company in its filing requested that its Application be processed under Modified
Procedure, i.e. by written submission rather than by hearing. Reference Rules of Procedure, IDAPA
31.01.01.201-204. At Staff’s request, the Commission agreed to defer any decision regarding
Modified Procedure until after Staff and parties had completed their analysis. On February 1, 2001,
the Commission issued Notices of Application and Intervention Deadline. Potlatch Corporation
was the only party to intervene. Reference Order No. 28638.
Staff reports that it has now completed its analysis. Based on discussions with the
Company and a more complete understanding of the Company’s Application and the ramifications
of the proposed changes, Staff notes its concurrence with the Company’s request for Modified
Procedure. Pursuant to agreement of all parties, Staff proposes a standard three-week comment
period beginning March 14, 2001, to be followed by a one-week period for Company reply.
YOU ARE HEREBY NOTIFIED that the Commission has preliminarily found that the
public interest regarding proposed modifications to the Company’s existing Power Cost Adjustment
(PCA) methodology may not require a hearing to consider the issues presented and that the
Application may be processed under Modified Procedure, i.e., by written submission rather than
by hearing. Reference Commission Rules of Procedure, IDAPA 31.01.01.201-204.
YOU ARE FURTHER NOTIFIED that the Commission will not hold a hearing in this
proceeding unless it receives written comment opposing the use of Modified Procedure and stating
why Modified Procedure should not be used. Reference IDAPA 31.01.01.203.
YOU ARE FURTHER NOTIFIED that the deadline for filing written comments or
protests with respect to the Application and the Commission’s use of Modified Procedure in Case

NOTICE OF MODIFIED PROCEDURE
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NOTICE OF ADDITIONAL SCHEDULING
ORDER NO. 28673 5
No. AVU-E-01-01 is Wednesday, April 4, 2001 Persons desiring a hearing must specifically
request a hearing in their written protests or comments.
YOU ARE FURTHER NOTIFIED that pursuant to agreement of the parties and the
Commission the following additional scheduling is adopted:
April 11, 2001 Avista Corporation deadline for filing reply comments.
YOU ARE FURTHER NOTIFIED that if no written comments or protests are received
within the deadline, the Commission will consider the matter on its merits and enter its Order
without a formal hearing. If comments or protests are filed within the deadline, the Commission
will consider them and in its discretion may set the matter for hearing or may decide the matter and
issue its Order on the basis of the written positions before it. Reference IDAPA 31.01.01.204.
YOU ARE FURTHER NOTIFIED that the Application and Company proposed
modifications to the Power Cost Adjustment (PCA) methodology have been filed with the
Commission and are available for public inspection during regular business hours at the
Commission’s office and at the Idaho offices of Avista Corporation. Written comments concerning
this Application should be mailed to the Commission and the Company at the addresses reflected
below.

COMMISSION SECRETARY
IDAHO PUBLIC UTILITIES COMMISSION
PO BOX 83720
BOISE, IDAHO 83720-0074

Street Address for Express Mail:

472 W. WASHINGTON ST
BOISE, ID 83702-5983
DAVID J. MEYER, ESQ.
SENIOR VP AND GENERAL COUNSEL
AVISTA CORPORATION
1411 E. MISSION AVE
PO BOX 3727
SPOKANE, WA 99220-3727
And
THOMAS D. DUKICH, DIRECTOR
RATES & TARIFF ADMINISTRATION
AVISTA CORPORATION
1411 E. MISSION AVE
PO BOX 3727
SPOKANE, WA 99220

All comments should contain the case caption and case number shown on the first page of this
document.

NOTICE OF MODIFIED PROCEDURE
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NOTICE OF ADDITIONAL SCHEDULING
ORDER NO. 28673 6
O R D E R
In consideration of the foregoing and as more particularly described above, IT IS
HEREBY ORDERED and the Commission in Case No. AVU-E-01-01 does hereby approve the
above schedule for Modified Procedure.
DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this _______
day of December 2002.

DENNIS S. HANSEN, PRESIDENT

MARSHA H. SMITH, COMMISSIONER

PAUL KJELLANDER, COMMISSIONER

ATTEST:

Jean D. Jewell
Commission Secretary

vld/O:AVU-E-01-01 _sw2

NOTICE OF MODIFIED PROCEDURE
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NOTICE OF ADDITIONAL SCHEDULING
ORDER NO. 28673 7