20080612final_order_no_30564.pdf

Office of the Secretary
Service Date
June 12, 2008
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE ANNUAL REVISION
AND UPDATED CALCULATION OF THE
ADJUST ABLE PORTION OF THE A VOIDED-
COST RATE FOR EXISTING PURPA
CONTRACTS FOR A VISTA CORPORATION
DBA A VISTA UTILITIES, FOR IDAHO POWER
COMPANY, AND P ACIFICORP DBA ROCKY
MOUNTAIN POWER
CASE NO. GNR-08-
ORDER NO. 30564
The Idaho Public Utilities Commission establishes purchase rates for energy
generated by cogeneration and small power production facilities that are qualifying facilities
(QFs) under Sections 201 and 210 of the Public Utility Regulatory Policies Act of 1978
(PURPA). In Order No. 28708, Case No. GNR-99-, the Commission established a
methodology for the annual adjustable rate portion of avoided costs for those QF contracts using
variable costs associated with Colstrip, a coal-fired generating facility in southeast Montana.
The Colstrip adjustments apply only to contracts executed between September 28, 1990 and
January 30, 1995. For those QF contracts with Colstrip-related fuel costs and variable O&M
future Colstrip variable cost adjustments are to be calculated by using FERC Form 1 Colstrip
Unit Coal Costs per megawatt hour (MWh) and adding $2.00/MWh (the average variable O&M
cost of Colstrip plus 20~/MWh for generation taxes plus a five percent (5%) adjustment for line
loss). As computed by Commission Staff, the Colstrip-related adjustable rate for the 2008-2009
year should change from 11.47 mill/kWh to 12.06 mill/kWh. The same calculated rate revision
under the avoided-cost methodology is used by Avista, PacifiCorp dba Rocky Mountain Power
and Idaho Power Company. This change in the variable rate affects existing contracts under the
previous SAR methodology.
The adjustable portion of the avoided-cost rates under Sumas-based methodology is
based on annual average gas prices indexed at Sumas, Washington. Reference Order No. 26135
Case Nos. WWP-95-3/IPC-95-7/UPL-95-2. The purpose of including an adjustable
component in the avoided-cost rates is to capture annual changes in natural gas fuel costs. The
Sumas adjustments apply to all SAR methodology contracts executed between January 31 , 1995
and September 26, 2002. As reported by A vista, the indexed gas prices have increased by
ORDER NO. 30564
$0.24/MMBtu. The approved gas price of $6.94/MMBtu plus the $0.24/MMBtu increase results
in a gas price of $7. 18/MMBtu for the 2008-2009 year. This by Staffs calculation equates to a
SAR fuel cost of 52.77 mill/kWh for existing contracts signed under an assumed heat rate of
350 Btu/kWh. Under the Commission-approved Sumas-based SAR methodology, the
adjustable portion of avoided-cost rates is the same for all ofIdaho s major electric utilities.
The Commission Staff by letter dated May 5, 2008, calculated changes to the annual
adjustable rate portion of avoided costs for those QF contracts using variable costs associated
with Colstrip and Sumas for review by the respective utilities. Avista, Idaho Power and
PacifiCorp responses by letter indicated that Staffs calculations are correct for existing contracts
under Colstrip-based and Sumas-based methodologies.
Commission Findings
The Commission has reviewed and considered the filings of record in Case No.
GNR-08-01. We find that the accuracy of the variable rate methodology figures submitted by
A vista (Sumas) and calculated by Staff (Colstrip) in this case have not been challenged.
The methodology that this Commission has approved for determining the variable
components of the avoided-cost rates is a relatively simple arithmetic re-calculation. We find
based upon our review of the calculations of both Colstrip and Sumas updates that the resulting
adjustable rates for existing contracts are fair, just and reasonable.
CONCLUSIONS OF LAW
The Idaho Public Utilities Commission has jurisdiction over A vista Corporation dba
Avista Utilities, Idaho Power Company and PacifiCorp dba Rocky Mountain Power, electric
utilities, pursuant to the authority and power granted it under Title 61 of the Idaho Code and the
Public Utility Regulatory Policies Act of 1978 (PURP A).
The Commission has authority under PURP A and the implementing regulations of
the Federal Energy Regulatory Commission (FERC) to set avoided costs, to order electric
utilities to enter into fixed-term obligations for the purchase of energy from qualified facilities
and to implement FERC rules.
ORDER
In consideration of the foregoing and as more particularly described above, IT IS
HEREBY ORDERED that the Colstrip-related and Sumas-related adjustable portions of the
ORDER NO. 30564
avoided-cost rates for existing PURP A contracts for A vista, Idaho Power, and PacifiCorp are
changed effective July 1 , 2008 as detailed above.
THIS IS A FINAL ORDER. Any person interested in this Order may petition for
reconsideration within twenty-one (21) days of the service date of this Order. Within seven (7)
days after any person has petitioned for reconsideration, any other person may cross-petition for
reconsideration. See Idaho Code ~ 61-626.
DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this fI-
day of June 2008.
MACK A. REDFORD, PRES DENT
MARSHA H. SMITH, COMMISSIONER
ATTEST:
bls/O:GNR-08-01 sw
ORDER NO. 30564