Idaho Public Utilities Commission
Case AVU-G-10-02, AVU-E-10-03
October 1, 2010
Contact: Gene Fadness (208) 334-0339, 890-2712
Avista PCA, gas efficiency charges increase
The Idaho Public Utilities Commission has approved two increases, one
to electric rates and another to natural gas rates for customers of Avista
Utilities.
Gas customers will pay an average 2.6 percent more for an increase to
the gas energy efficiency rider. For a residential gas customer who uses the
utility’s average of 66 therms per month, the increase is about $1.52 per
month. Avista did not propose an increase to its existing tariff for energy
efficiency programs for its electric customers.
Electric customers will pay an average 2.6 percent more for the
company’s yearly Power Cost Adjustment, which tracks the always changing costs
of electric power supply. For an electric customer who uses an average of 1,000
kWh per month, the increase is about $1.88 per month.
Neither of the rate adjustments increase or decrease company earnings.
All the money collected in the PCA and in the efficiency rider must go directly
to those programs.
Natural gas efficiency rider, Case No.
AVU-G-10-02
Customer response to more than 30 Avista conservation programs to
reduce natural gas consumption has been greater than anticipated, with
customers in Idaho and Washington saving 2 million therms as a result of the
programs, well above the targeted 1.6 million therms.
When utilities propose increases in efficiency riders, the commission
investigates the conservation programs funded by the rider for their
cost-effectiveness and approves them only if it has evidence demonstrating that
lack of such programs would result in even higher rates for customers.
In its comments, commission staff stated an increase in natural gas
rates will not be viewed favorably by many customers, especially given the
current economic climate. However, after a review of the programs, staff
determined, and the commission agreed, that the total of all customers’ bills
will be lower with the programs and the rider in place than without them. For
example, the reduction of more than 2 million therms by customers during 2009
prevented Avista from having to buy or store those 2 million therms at greater
cost to customers.
Other than voluntary reduction, utility-operated energy efficiency
remains the lowest-cost resource for all customers. Even those who do not
directly participate in the programs benefit from them because of the lower
consumption systemwide. The company’s most recent cost-benefit analysis (2008)
indicates the net benefit to customers from the programs was more than $8.9
million.
Avista’s conservation programs consist primarily of providing
financial incentive or rebates for cost-effective efficiency measures installed
by customers with a simple payback of greater than one year. This includes more
than 300 measures packaged into 30-plus programs. Some of the measures include
programs for appliances, compressed air and HVAC systems and motors. There are
also industrial applications, maintenance strategies and sustainable building
measures.
Portions of rider revenue go toward low-income weatherization, direct
aid ($465,000) to Idaho electric and natural gas low-income customers and
$25,000 to Idaho Community Action Partnership agencies for low-income outreach
and conservation education.
The per-therm cost of the rider to residential customers increases
from $0.034 cents per therm to $0.057 cents.
On the electric side, Avista is not proposing an increase to its
energy efficiency rider, even though it anticipates a shortfall of about
$600,000 at the close of 2010. Avista’s 2009 energy efficiency savings in
electricity in Idaho and Washington was more than 82 million kilowatt hours, or
about 9.4 average megawatts. That was 143 percent of the company’s target of
57.2 million kWh. The company claims the net benefit to customers from the
electric programs during 2008 was more than $39 million.
Power Cost Adjustment, Case No. AVU-E-10-03
Below-normal hydro generation and costs associated with the Lancaster
generating plant resulted in more power supply expense than is already included
in base rates resulting in Avista’s one-year 2.6 percent Power Cost Adjustment
(PCA) surcharge.
The two major components of Avista customers’ electric bills are the
base rate, which covers primarily fixed costs that don’t change from year to
year, and the PCA rate. The PCA increases or decreases rates depending on
conditions outside the company’s control that can dramatically alter power
supply expense. Those conditions include variations in hydroelectric generation
caused by lack of stream flows, unanticipated changes in fuel costs and changes
in wholesale market prices for energy.
During those years when power supply expenses are less than what is
already covered in base rates, customers receive a credit. During years when
power supply expenses are greater than included in base rates, customers get a
surcharge. Both the surcharge and credit last for 12 months and then a new
adjustment will be calculated to adapt to changing conditions and updated
projections. The updated PCA is effective Oct. 1 of each year. Unlike a general
rate case, a PCA increase does not increase company earnings. The PCA surcharge
is collected from ratepayers, kept in a deferred account, and then passed
directly to wholesale power and fuel suppliers.
The PCA surcharge effective Oct. 1 increases from 0.34 cents per kWh to 0.53 cents per kWh.