20110826Amended Application.pdf

A vista Corp.
1411 East Mission P.O. Box 3727
Spokane. Washington 99220-0500
Telephone [phone]
Toll Free 800-727-9170
RECEIVED
~~'V'STA'
Corp.201 I AUG 26 AM 10: 20
August 25,2011
State of Idaho
Idaho Public Utilities Commission
Statehouse
Boise, Idaho 83720
Case No. AVU-G-II-04/Advice No. 11-03-G
Attention: Ms. Jean D. Jewell
i.P.V.C. No. 27 - Natural Gas Service
Enclosed for fiing with the Commission are the following revised taff sheets:
Substitute Sixteenth Revision Sheet 150 canceling Fifteenth Revision Sheet 150
On August 12, 2011, the Company fied with the Commission its anual Purchased Gas Adjustment
(PGA). In that filing, the Company requested an increase in anual revenue of approximately $1.1
milion or about 1.53%.
In recent weeks, forward 30-day average natural gas costs, which impact planed hedges and the
pricing of index volumes, have decreased to a level lower than what the Company including in its
original filing. Takng into account the lower 30-day average results in a revised requested increase
in anua revenue of approximately $0.7 milion or about 0.98%. Below is an updated table
sumarzing the proposed changes reflected in ths filing:
Commodity Demand Total Sch. 155 Total Rate Overall
Sch.Change Change Sch.150 Amort.Change Percent
Service No.pertherm perthm Change pertherm pertherm Change
General 101 ($0.04304)$0.00690 ($0.03614)$0.04697 $0.01083 1.10%
Lg. General 111 ($0.04304)$0.00690 ($0.03614)$0.04697 $0.01083 1.40%
Interrptib Ie 131 ($0.04304)$0.00000 ($0104304)$0.04777 $0.00473 0.81%
Included below are revisions to certain sections of Section X (Commodity Costs) from the
Company's original application, only updated for the changes included in this update (shown in
BOLD):
As shown in the table above, the estimated commodity cost (WACOG) change is a decrease
of 4.3 cents per thermo The proposed WACOG is 41.8 cents per therm compared to the
present WACOG of 46.1 cents per therm included in rates.
The Company's natural gas procurement plan uses a diversified approach to procure gas for
the coming PGA year. While the plan generally incorporates a strctured approach for the
hedging portion of the portfolio, the Company exercises flexibility and discretion in all areas
of the plan based on changes in the wholesale market. The Company typically meets with
the Commission Staff semi-anually to discuss the state of the wholesale market and the
status of the Company's procurement plan. In addition, the Company communcates with
Staff when it believes it makes sense to deviate from its procurement plan and/or
opportities arise in the market.
Avista has been hedging gas on both a periodic and discretionar basis thoughout 2011 for
the forthcoming PGA year (thirteen months). Approximately 70% of estimated anual load
requirements for the PGA year (October 2011 through October 2012) will be hedged at a
fixed price, comprised of: 1) 32% of volumes hedged for a term of one year or less, 2) 18%
of volumes from prior multi-year hedges, and 3) 20% of volumes from underground storage.
Though July, the planed hedge volumes for the PGA year have been executed at a weighted
average price of $4.76 per dekatherm ($0.476 per therm).
The Company used a 30-day historical average of forward prices (ending August 22, 2011)
by supply basin to develop an estimated cost associated with index/spot purchases. The
estimated monthly volumes to be purchased by basin are multiplied by the (30-day) average
price for the corresponding month and basin. These index/spot volumes represent
approximately 30% of estimated anual load requirements for the coming year and the
anual weighted average price for these volumes is $3.90 per dekatherm.
Available underground storage capacity at Jackson Prairie represents approximately 20% of
anual load requirements (31 % of load requirements during the December to March
withdrawal period). The estimated weighted average cost for all storage volumes is $3.91
per dekatherm. The Company also utilizes (optimizes) its underground storage capacity to
provide additional benefits to customers beyond the winter/sumer price differential and
supply reliability.
If the Commission approves the Company's revised tariff the average residential or small
commercial customer using 62 therms per month will see an increase of $0.67 per month, or
approximately 1.10%. The present bil for 62 therms is $60.76 while the proposed bil is $61.43.
In addition to the revised tarff sheet, the Company is including updated workpapers supporting the
proposed revenue change. The Company requests that the proposed taiff sheets be made effective
October 1, 2011. If you have any questions regarding this fiing, please contact Patrick Ehrbar at
[phone] or Craig Bertholf at [phone].
Sincerely,
~o~i.
Vice President, State and Federal Regulation
Enclosures
CERTIFICATE OF SERVICE
I HEREBY CERTIFY that I have served Avista Corporation dba Avista Utilities' updated
filing AVU-G-11-04 with Tariff IPUC No. 27 Natural Gas Service by mailing a copy thereof,
postage prepaid to the following:
Jean D Jewell, Secretary
Idaho Public Utilities Commission
472 W. Washington Street
Boise, ID 83720-5983
Chad Stokes
Cable Huston Benedict Haagensen &
Lloyd, LLP
1001 SW 5th, Suite 2000
Portland, OR 97204-1136
Paula Pyron
Northwest Industrial Gas Users
4113 Wolfberry Court
Lake Oswego, OR 97035-1827
Curt Hibbard
St. Joseph Regional Medical Center
PO Box 816
Lewiston, ID 83501
Spokane, Washington this 25th day of August 2011.
Patrick Ehrbar
State & Federal Regulation
AVISTA UTILITIES
Case No. A VU-G-II-04
EXHIBIT "C"
Revised Workpapers
August 25,2011
RECEIVED
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Avista Utilties
State of Idaho
Average Increase Per Customer (From Last GRC)
Sch Average Present Total Proposed Total Estimated Estimated
Mo. Usage Rate Present Rate Proposed Monthly Increase
Per Cust.Cost Cost Increase Percentage
101 62 $0.91553 $56.76 $0.92636 $57.43
Basic Charge $4.00 $4.00 $4.00
$60.76 $61.43 $0.67 1.10%
111 2,023
First 200 $0.93198 $186.40 $0.94281 $188.56
Next 800 $0.79960 $639.68 $0.81043 $648.35
1,0001 - 10,000 $0.72499 $741.66 $0.73582 $752.74
Over 10,000 $0.67583 $0.68666
$1,567.74 $1,589.65 $21.91 1.40%
131 $0.58391 $0.58864 0.81%
132 36,469 $0.66482 $24,245.32 $0.62178 $22,675.69 ($1,569.63)-6.47%
Page 2
Avista Utilties
Calculation of Idaho Proposed Rates
Sch Description Proposed Proposed Proposed Present Present Total
No.Present Schedule Schedule Schedule Schedule Schedule Proposed
Rate 150 155 156 191 (DSM)199 (DSIT)Rate
101 General $0.37515 $0.52973 ($0.02885)$0.05762 ($0.00729)$0.92636
111 Large General
First 200 $0.39516 $0.52973 ($0.02885)$0.05038 ($0.00361)$0.94281
Next 800 $0.26278 $0.52973 ($0.02885)$0.05038 ($0.00361)$0.81043
Next 9,000 $0.18817 $0.52973 ($0.02885)$0.05038 ($0.00361)$0.73582
Over 10,000 $0.13901 $0.52973 ($0.02885)$0.05038 ($0.00361)$0.68666
112 Large General
First 200 $0.39516 $0.52973 $0.05038 ($0.00361)$0.97166
Next 800 $0.26278 $0.52973 $0.05038 ($0.00361)$0.83928
Next 9,000 $0.18817 $0.52973 $0.05038 ($0.00361)$0.76467
Over 10,000 $0.13901 $0.52973 $0.05038 ($0.00361)$0.71551
131 Interruptible $0.16647 $0.41797 ($0.03314)$0.04020 ($0.00286)$0.58864
132 Interruptible $0.16647 $0.41797 $0.04020 ($0.00286)$0.62178
146 Transportation $0.10559 ($0.00159)$0.10400
Page 3
Avista Utilties
Calculation of Idaho Present Rates
Sch Description Present Present Present Present Present Total
No.Tariff Schedule Schedule Schedule Schedule Present
Rate 150 155 191 (DSM)199 (DSIT)Rate
101 General $0.37515 $0.56587 ($0.07582)$0.05762 ($0.00729)$0.91553
111 Large General
First 200 $0.39516 $0.56587 ($0.07582)$0.05038 ($0.00361)$0.93198
Next 800 $0.26278 $0.56587 ($0.07582)$0.05038 ($0.00361)$0.79960
1 ,0001 - 10,000 $0.18817 $0.56587 ($0.07582)$0.05038 ($0.00361)$0.72499
Over 10,000 $0.13901 $0.56587 ($0.07582)$0.05038 ($0.00361)$0.67583
112 Large General
First 200 $0.39516 $0.56587 $0.05038 ($0.00361)$1.00780
Next 800 $0.26278 $0.56587 $0.05038 ($0.00361)$0.87542
1,0001 - 10,000 $0.18817 $0.56587 $0.05038 ($0.00361)$0.80081
Over 10,000 $0.13901 $0.56587 $0.05038 ($0.00361)$0.75165
131 Interruptible $0.16647 $0.46101 ($0.08091)$0.04020 ($0.00286)$0.58391
132 Interruptible $0.16647 $0.46101 $0.04020 ($0.00286)$0.66482
146 Transportation $0.10559 ($0.00159)$0.10400
Page 4
Avista Utilities
State of Idaho
Recap of Rate Changes Including GRF
Previous Proposed Increase
Rate Rate ",Decrease::
Schedule 150 (Gas Costs)
Schedule 1 01 $0.56587 $0.52973 ($0.03614)
Schedule 111 $0.56587 $0.52973 ($0.03614)
Schedule 112 $0.56587 $0.52973 ($0.03614)
Schedule 131 $0.46101 $0.41797 ($0.04304)
Schedule 132 $0.46101 $0.41797 ($0.04304)
Schedule 146 $0.00000 $0.00000 $0.00000
Schedule 156 (Gas Costs)
Schedule 1 01 $0.00000 $0.00000 $0.00000
Schedule 111 $0.00000 $0.00000 $0.00000
Schedule 112 $0.00000 $0.00000 $0.00000
Schedule 131 $0.00000 $0.00000 $0.00000
Schedule 132 $0.00000 $0.00000 $0.00000
Schedule 146 $0.00000 $0.00000 $0.00000
Schedule 155 (Gas Cost Amortization)
Schedule 1 01 ($0.07582)($0.02885)$0.04697
Schedule 111 ($0.07582)($0.02885)$0.04697
Schedule 112 $0.00000 $0.00000 $0.00000
Schedule 131 ($0.08091)($0.03314)$0.04777
Schedule 132 $0.00000 $0.00000 $0.00000
Schedule 146 $0.00000 $0.00000 $0.00000
Combined Schedule 150, 155 & 156
Schedule 101 $0.49005 $0.50088 $0.01083
Schedule 111 $0.49005 $0.50088 $0.01083
Schedule 112 $0.56587 $0.52973 ($0.03614)
Schedule 131 $0.38010 $0.38483 $0.00473
Schedule 132 $0.46101 $0.41797 ($0.04304)
Schedule 146 $0.00000 $0.00000 $0.00000
Page 5
Avista Utilities
State of Idaho - Weighted Average Cost of Gas
For 1011/11 -10/31/12 (13 Months)
NORTHWEST PIPELINE
TF-2 Demand Charge
TF-2 Variable Transportation Charge
SGS-1 Commodity Washington
Idaho
TF-1 Demand Charge
End User Capacity Releases
Variable Transportation Charge
CANADIAN PIPELINES
TCPL Alberta (NOVA) Demand
TCPL - BC (ANG - FOOTHILLS)
GTN Demand
GTN Variable Transportation Charge
Spectra Energy - Westcoast Energy
OTHER
Gas Purchases
Capacity Releases
Terasen Reservation Credit
GRI Funding
Total
Note 1 - Based on 5 day peak study
Note 2 - Annual Commodity Percentage
Annual System 13 Mos System Idaho Idaho
Biling Biling Rate System Demand Commodity
Determinants Determinants Per Therm Total Cost Costs (1)Costs (2)
(Therms)(Therms)30.420%30.358%
29,140,920 31,569,330 $0.037984 $1,199,129 $364,775
54,337,250 $0.003000 $163,012 $49,487
38,336,470 $0.390500 $14,970,392
16,000,780 $0.390500 $6,248,305 $6,248,305
559,621,000 606,256,083 $0.037984 $23,028,031 $7,005,127
2,555,000 2,767,917 $0.037984 $105,136
85,582,210 $0.003190 $273,007 $82,879
345,375,290 378,263,670 $0.01978 $7,483,132 $2,276,369
52,564,015 57,028,356 $0.06259 $3,569,676 $1,085,895
363,275,760 $0.00908 $3,298,474 $1,003,396
125,000,000 $0.00058 $72,500 $22,010
29,234,170 31,670,351 $0.04456 $1,411,199 $429,287
64,215,200 $0.45071 $28,942,433 $28,942,433
($10,800,000)($3,285,360)
($6,500,000)($1,973,270)
$32,000
118,552,450 $73,464,426 $8,879,489 $33,403,844
Estimated Therms 79,746,077 80,216,022
Proposed WACOG $0.52777 $0.11135 $0.41642
Gross Revenue Factor (GRF)100.3718%100.3718%100.3718%
Proposed WACOG Including GRF $0.52973 $0.11176 $0.41797
Present Gas Costs Including GRF $0.56587 $0.10486 $0.46101
Rate Change Including GRF ($0.03614)$0.00690 ($0.0430)
Sch 101 Sch 101
Sch 111 Sch 111
Sch 112 Sch 112
Sch 131
Sch 132
Page 6
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Avista Utilties
State of Idaho
Total Gas Costs Without GRF
For 10/1/11 -10/31/12 (13 Months)
Demand Commodity Total
Proposed Gas Costs Before GRF
Schedules 101 - 112 $0.11135 $0.41642 $0.52777
Schedules 131 - 132 $0.41642 $0.41642
Present Gas Costs Before GRF
Schedules 101 - 112 $0.10421 $0.45817 $0.56238
Schedules 131 - 132 $0.45817 $0.45817
Increase c:Decrease:: Before GRF
Schedules 101 - 112 $0.00714 ($0.04175)($0.03461)
Schedules 131 - 132 ($0.04175)($0.04175)
Proposed Gas Costs Including GRF
Schedules 101 - 112 $0.11176 $0.41797 $0.52973
Schedules 131 - 132 $0.41797 $0.41797
Present Gas Costs Including GRF
Schedules 101 - 112 $0.10486 $0.46101 $0.56587
Schedules 131 - 132 $0.46101 $0.46101
Increase c:Decrease:: Including GRF
Schedules 101 - 112 $0.00690 ($0.04304)($0.03614)
Schedules 131 .132 ($0.04304)($0.04304)
Page 8
Avista Utilties
State of Idaho
Northwest Pipeline
Rate Contract Number Annual Daily Annual 13 Month
Contract Effective Demand of Contract Rate System System
Number Rate Schedule Date (Dth's)Days Demand (Note 1)Costs Costs
(Dth's)
100010 TF-1 Firm Transportation 811/10 133,270 366 48,776,820 $0.37984 $18,527,387 $20,071,336
100164 TF-1 Firm Transportation 8/1/10 10,000 366 3,660,000 $0.37984 $1,390,214 $1,506,065
100314 TF-2 Jackson Prairie 8/1/10 7,962 366 2,914,092 $0.37984 $1,106,889 $1,199,130
136948 TF-1 Firm Transportation 8/1/10 5,000 366 1,830,000 $0.37984 $695,107 $753,033
136950 TF-1 Firm Transportation 8/1/10 5,330 366 1,950,780 $0.37984 $740,984 $802,733
Total Firm Transportation 59,131,692 $ 22,460,581 $ 24,332,297
Less: TF-2 Jackson Prairie (2,914,092)(1,106,889)($1,199,130)
Less: End User Capacity Releases (255,500)(97,049)($105,136)
Net TF-1 Firm Transportation 55,962,100 $ 21,256,643 $ 23,028,031
Note 1 -From NWP First Revised Sheet NO.5, Fifth Revised Volume No. 1
TF-1, Large Customer, System-Wide (MMBTu) effective 7/21/11
Page 9
Avista Utilities
State of Idaho
Gas Transmission NW Corporation
FTS-1 FTS-1 FTS-1 FTS-1 System
F.00177 F-00177 F-00178 F-002591 Total
(Oct - Mar)(Apr - Sept)
MMBTu's 54,823 30,000 20,782 25,000
Number of Effective Days (13 Mm 214 214 397 397
13 Months MMBTu's 11,732,122 6,420,000 8,250,454 9,925,000 36,327,576
10/1/11 - 12/31/11 Volumes 5,043,716 2,760,000 1,911,944 2,300,000 12,015,660
1/1/12 - 10/31/12 Volumes 6,688,406 3,660,000 6,338,510 7,625,000 24,311,916
11,732,122 6,420,000 8,250,454 9,925,000 36,327,576
Daily Non-Mileage Rate (Note 1)$0.036632 $0.036632 $0.036632 $0.036632
Daily Non-Mileage Rate (Note 2)$0.039196 $0.039196 $0.039196 $0.039196
Mileage Rate (Note 1)$0.000463 $0.000463 $0.000463 $0.000463
Mileage 103.39 102.96 117.22 108.29
Total Mileage Rate $0.047870 $0.047670 $0.054270 $0.050140
Mileage Rate (Note 2)$0.000498 $0.000498 $0.000498 $0.000498
Mileage 103.39 102.96 117.22 108.29
Total Mileage Rate $0.051490 $0.051270 $0.058380 $0.053930
Fixed 13 Month Amount $446,920 $244,561 $318,482 $383,124 1,393,087
13 Month Mileage Based Amount $585,829 $319,217 $473,803 $526,538 1,905,387
Total 13 Month Amount $1,032,749 $563,778 $792,285 $909,662 $3,298,474
Note 1 - Gas Transmission NW, Fourth Revised Volume No.1-A, Part 4.1
Effective 5/04/11
Note 2 - Gas Transmission NW, Fourth Revised Volume No.1-A, Part 4.1
Proposed to be effective 1/1/12
Page 10
Avista Utilties
State of Idaho
TransCanada Pipeline - Foothills (ANG)
Daily Annual 13 Months
Daily Annual Mileage Mileage Mileage
Contract No. of Contract Rate Miles Costs Costs
Demand (Gj)Moo Demand (Gj)(Note 1)
AVA - F3 (Firm)31,100 12 373,200 $0.01585217 170.7 $1,009,866 $1,094,022
WWP - FI (Firm)58,284 6 349,704 $0.01585217 170.7 $946,287 $1,104,002
WWP - FI (Firm)31,892 6 191,352 $0.01585217 170.7 $517,792 $604,091
AVA-F2 7,159 6 42,954 $0.01585217 170.7 $116,232 $135,604
AVA-F2 22,508 12 270,096 $0.01585217 170.7 $730,871 $791,777
WWP - F3 (Firm)16,441 12 197,292 $0.01585217 170.7 $533,865 $578,354
WWP - F3 (Firm)16,817 12 201,804 $0.01585217 170.7 $546,075 $591,581
184,201 1,626,402 $4,400,988 $4,899,431
Canadian Exchange Rate 100%100%
$4,400,988 $4,899,431
Less: Oregon Portion 47,705 $1,139,790 $1,329,755
Total 136,496 $3,261,198 $3,569,676
Annualized Therms
GJ to Dth Conversion Factor 1.055056
Dth Per Day 144,011
Days 365
WAIID Annualized Therms 52,564,015
Note 1 - FT Firm Service Rate, effective January 1, 2011 (Canadian cents/Gj/Km/Month)
Page 11
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Avista Utilties
State of Idaho
Westcoast Energy - Demand Calculation
Rate Schedule FT-D, Appendix A, Effective 4/1/11
Demand Rate per month (C$)
(10 cubed/m cubed)
Daily Demand (*12 mos/366 days)
Convert to GJ (/38.25)
Convert to MMBtu's (*1.055056)
Convert to U.S. Dollars
Billng Determinants
Contract Demand E3M3
Number of Days
Annual Contract Demand E3M3
Conversion Factor
GJ
Conversion Factor
Dth
Total Annual Costs
Total 13 Months Costs (Annual Costs /12Mos * 13Mos)
Page 13
$492.71
$16.1544
$0.422338
$0.445590
100%
220.32
366
80,637.1
38.25
3,084,369
1.055056
$0.445590
2,923,417
$1,302,645
$1,411,199
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Avista Utilties
State of Idaho
Recap of Changes To Schedule 150/156
Anticipated Effect Date 10/1/11
CENTS PER THERM Commodity TotalDemand Charge
Schedule 101
Current Rate
Proposed IncroeDecr::
Proposed Rate
0.46101
(0.04304)
0.41797
Schedule 111
Current Rate
Proposed IncroeDecr::
Proposed Rate
0.46101
(0.04304)
0.41797
Schedule 112
Current Rate
Proposed IncroeDecr::
Proposed Rate
0.46101
(0.04304)
0.41797
Schedule 131
Current Rate
Proposed IncroeDecr::
Proposed Rate
0.46101
(0.04304)
0.41797
Schedule 132
Current Rate
Proposed IncroeDecr::
Proposed Rate
0.46101
(0.04304)
0.41797
Schedule 146
Current Rate
Proposed IncroeDecr::
Proposed Rate
0.10486
0.00690
0.11176
0.10486
0.00690
0.11176
0.10486
0.00690
0.11176
0.56587
(0.03614)
0.52973
0.56587
(0.03614)
0.52973
0.56587
(0.03614)
0.52973
0.46101
(0.04304)
0.41797
0.46101
(0.04304)
0.41797
Page 15
Avista Utilties
State of Idaho
Calculation of Changes to Schedule 155
Firm Customers, Schs 101 & 111
Firm Customers, Schedules 112
Interruptible Customers, Schedules 131
Interruptible Customers, Schedules 132
Transportation Customers, Schedules 146
Current
Rate
Incr -=Decr.
Proposed
Rate
Incr -=Decr.
Total
Proposed
Incr -=Decr.
($0.07582)
($0.08091)
Page 16
($0.02885)
($0.03314)
$0.04697
$0.04777
Avista Utilties
Idaho Gas Tracker
Calculation of New Amortization Rate
Schedule 155
Schedule 101
Amortization Total
All Firm All Sales Rate Revenue Amortization
Customers Customers Before GRF Adjustment Rate
$0.00428 ($0.03302)($0.02874)($0.00011)($0.02885)
$0.00428 ($0.03302)($0.02874)($0.00011)($0.02885)Schedule 111
Schedule 112
Schedule 131 ($0.03302)($0.03302)($0.00012)($0.03314)
Schedule 132
Page 17
Avista Utilities
Idaho Gas Tracker
Balances at6/30/11
Unamortzed Current
Deferrals Deferrals Total Adjustments Total
At 6/30/11 At 6/30/11
(Acct 191000)(Acc 191010)
All Firm Customers 1,779,700.67 (1,439,952.56)339,748.11 339,748.11
All Sales Customers (2,480,406.48)(141,932.88)(2,622,339.36)(2,622,339.36)
Customer 1 (57,503.42)(1,017.37)(58,520.79)(58,520.79)
Customer 2 (22.44)(78.37)(100.81)(100.81)
Customer 3 (3,437.77)(3,437.77)(3,437.77)
Customer 4 (37,087.85)(1,922.16)(39,010.01 )(39,010.01 )
(798,757.29)(1,584,903.34)(2,383,660.63)(2,383,660.63)
Page 18
Avista Utilities
Idaho Gas Tracker
Calculation of Amortization Rate
Firm Customers (Schedules 101 & 111)
Estimated Estimated Total Balance
Sch 101 Sch 111 Estimated Amortization Interest To Be
Therms Therms Therms $0.00428 1.00%Amortized
$339,748.11
October 2011 3,577,303 1,810,187 5,387,490 ($23,058.46)$273.52 316,963.17
November 6,796,882 2,691,202 9,488,084 (40,609.00)247.22 276,601.39
December 2012 9,156,578 3,055,566 12,212,144 (52,267.98)208.72 224,542.13
January 8,778,247 2,784,979 11,563,226 (49,490.61)166.50 175,218.02
February 7,078,475 2,338,155 9,416,630 (40,303.18)129.22 135,044.06
March 6,073,804 1,988,678 8,062,482 (34,507.42)98.16 100,634.80
April 4,385,877 1,372,997 5,758,874 (24,647.98)73.59 76,060.41
May 2,357,918 1,086,384 3,444,302 (14,741.61 )57.24 61,376.04
June 1,508,835 792,190 2,301,025 (9,848.39)47.04 51,574.69
July 1,254,356 808,245 2,062,601 (8,827.93)39.30 42,786.06
August 1,418,985 651,268 2,070,253 (8,860.68)31.96 33,957.34
September 1,570,635 977,272 2,547,907 (10,905.04)23.75 23,076.05
October 2012 3,576,263 1,854,796 5,431,059 (23,244.93)9.54 (159.34)
57,534,158 22,211,919 79,746,077 ($341,313.21)$1,405.76
Page 19
Avista Utilties
Idaho Gas Tracker
Calculation of Amortization Rate
Sales Customers (Schedules 101, 111 & 131)
Estimated Estimated Estimated Total Balance
Sch 101 Sch 111 Sch 131 Estimated Amortization Interest To Be
Therms Therms Therms Therms ($0.03302)1.00%Amortized
($2,622,339.36)
October 2011 3,577,303 1,810,187 5,387,490 $177,894.92 ($2,111.16)(2,446,555.60)
November 6,796,882 2,691,202 9,488,084 313,296.53 (1,908.26)(2,135,167.33)
December 9,156,578 3,055,566 12,212,144 403,244.99 (1,611.29)(1,733,533.63)
January 2012 8,778,247 2,784,979 11,563,226 381,817.72 (1,285.52)(1,353,001.43)
February 7,078,475 2,338,155 9,416,630 310,937.12 (997.94)(1,043,062.25)
March 6,073,804 1,988,678 8,062,482 266,223.16 (758.29)(777,597.38)
April 4,385,877 1,372,997 5,758,874 190,158.02 (568.77)(588,008.13)
May 2,357,918 1,086,384 3,444,302 113,730.85 (442.62)(474,719.90)
June 1,508,835 792,190 2,301,025 75,979.85 (363.94)(399,103.99)
July 1,254,356 808,245 2,062,601 68,107.09 (304.21)(331,301.11)
August 1,418,985 651,268 2,070,253 68,359.75 (247.60)(263,188.96)
September 1,570,635 977,272 2,547,907 84,131.89 (184.27)(179,241.34)
October 2012 3,576,263 1,854,796 5,431,059 179,333.57 (74.65)17.58
57,534,158 22,211,919 79,746,077 $2,633,215.46 ($10,858.52)
Page 20
Avista Utilities
Idaho Gas Tracker
Revenue Adjustment Factor
From General Rate Case AVU-G-11-01, Filed 7/05/11
Commission Fees
Uncollectibles
Calculation of Revenue Adjustment Factor
1 1 (1 - 0 ) =
$0.002039
$0.001665
Page 21
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Page 35
Washington Water Power Company
State of Idaho
Analysis of Account 191010
Demand &
Total Commodity Cap. Rei'Interest
Acct 191010 Deferral Deferral
4/30/11 Current Deferrals (592,957.11 )(507,267.97)(85,689.14)
Estimated Interest (1,141.03)(1,141.03)
4/30/11 Ending Balance (1,666,878.25)381,239.93 (2,044,095.81 )(4,022.37)
5/31/11 Current Deferrals (13,896.25)(282,542.55)268,646.30
Estimated Interest (1,394.86)(1,394.86)
5/31/11 Ending Balance (1 ,682,169.36)98,697.38 (1,775,449.51)(5,417.23)
6/30/11 Current Deferrals 98,626.73 (244,664.23)343,290.96
Estimated Interest (1,360.71 )(1,360.71)
6/30/11 Ending Balance (1,584,903.34)(145,966.85)(1,432,158.55)(6,777.94)
Page 36
I.P.U.C. No.2?
Substitute Sixteenth Revision Sheet 150
Replacing
Fifteenth Revision Sheet 150
AVISTA CORPORATION
d/b/a Avista Utilities
150
SCHEDULE 150
PURCHASE GAS COST ADJUSTMENT - IDAHO
APPLICABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
PURPOSE:
To pass through changes in costs resulting from purchasing and transporting
natural gas, to become effective as noted below.
RATE:
(a) The retail rates of firm gas Schedules 101, 111 and 112 are to be
increased by 52.973é per therm in all blocks of these rate schedules.
(b) The rates of interruptible Schedules 131 and 132 are to be increased by
41.797é per thermo
(c) The rate for transportation under Schedule 146 is to be decreased by
O.OOOø per therm.
WEIGHTED AVERAGE GAS COST:
The above rate changes are based on the following weighted average cost of gas
per therm as of the effective date shown below:
Demand CommoditySchedules 101 11.176é 41.797é
Schedules 111 and 112 11.176é 41.797 éSchedules 131 and 132 .000é 41.797é
The above amounts include a gross revenue factor.
Total
52.973é
52.973Ø
41.797Ø
Demand Commodity TotalSchedules 101 11.135Ø 41.642Ø 52.777Ø
Schedules 111 and 112 11.135Ø 41.642Ø 52.777ØSchedules 131 and 132 .OOOØ 41.642Ø 41.642Ø
The above amounts do not include a gross revenue factor.
BALANCING ACCOUNT:
The Company wil maintain a Purchase Gas Adjustment (PGA) Balancing
Account whereby monthly entries into this Balancing Account wil be made to reflect
differences between the actual purchased gas costs collected from customers and the
actual purchased gas costs incurred by the Company. Those differences are then
collected from or refunded to customers under Schedule 155 - Gas Rate Adjustment.
Issued August 25, 2011 Effective October 1, 2011
Issued by Avista UtilitiesBy Kelly O. Norwood - Vice-President, State & Federal Regulation
?' ~~ i.