950530.docx

DECISION MEMORANDUM
TO:COMMISSIONER NELSON
COMMISSIONER SMITH
COMMISSIONER HANSEN
MYRNA WALTERS
STEPHANIE MILLER
DAVE SCHUNKE
MADONNA FAUNCE
RANDY LOBB
TONYA CLARK
GARY RICHARDSON
WORKING FILE
FROM:SCOTT WOODBURY
DATE:MAY 30, 1995
RE:CASE NO. INT-G-95-3
ANNUAL PGA ADJUSTMENT (DECREASE)
On May 26, 1995, Intermountain Gas Company (IGC; Company) filed an Application with the Idaho Public Utilities Commission (Commission) for authority to place into effect new rate schedules that would result in a decrease of $4,340,194 in its annualized revenues.  The decrease reflects a change in the Company’s cost of gas and the elimination and/or imposition of a number of temporary gas and transportation cost adjustments, surcharges and credits.  The Company also proposes to balance out its Purchased Gas Cost Adjustment (PGA), Account No. 186.  The PGA account is a deferral mechanism for over- and under-collections and for realized savings on spot market gas purchases.  
The proposed adjustments reflected in the Application include changes in costs billed IGC by Northwest Pipeline Corporation (NWP), the elimination of temporary surcharges and credits (INT-G-94-3), a decrease in the Company’s weighted average cost of gas (WACOG), the benefits generated from the Company’s segmentation of its firm capacity rights on NWP’s system, and the inclusion of temporary surcharges and credits related to gas and transportation costs from the Company’s deferred gas cost account (PGA Account No. 186).
The Application proposes implementation of the following permanent and temporary changes, adjustments, surcharges and credits to IGC’s tariff rate for natural gas service, sales and transportation.
Permanent Adjustments
●INT-G-94-3 Elimination of temporary surcharges/credits$1,244,781
●Change in transportation, storage and commodity rates/charges($2,614,222)
Temporary Surcharges or Credits
Deferred gas costs (IGC PGA Account No. 186)
●Deferred Account No. 186 Miscellaneous (fixed)$767,071
●Deferred Account No. 186 (variable) ($518,882)
●Deferred Account No. 186 – interest($21,345)
●Special Contract Shared Margin ($678,469)
●Northwest Exploration Joint Venture($64,000)
Refund Amount for IGC Past Participation
●Capacity Segmentation Credits($2,455,128)
As computed by the Company, the total requested decrease in revenue on an annual basis is ($4,340,194) or -4.2%.  The decrease in sales gas revenues is ($4,771,192) or -5.3%.  The increase in transportation service revenues is $430,998 or 3.2%.  The annualized change by class of service per Company calculation is as follows:
Gas Sales
RS-1 Residential
RS-2 Residential
GS-1 Gen. Svc.
Revenue
($442,174)
($3,035,561)
($1,293,457)
Average
Decrease
¢/Therm
(1.401¢)
(4.346¢)
(1.856¢)
Average
Decrease
% Change
(2.2%)
(8.2%)
(3.9%)
Proposed
Average Price
$/Therm
$0.62198
$0.48792
$0.46124LV-1 Lg. Volume*
*T-1 Tariff Price plus the Weighted Average Cost of Gas (WACOG), $0.18891.
(Compare WACOG Int-G-94-3: $0.22011)
WACOG = total commodity cost of gas ÷ total purchase therms
Transportation
T-1 Transportation
Revenue
$430,998
Average
Increase
¢/Therm
0.232¢
Average
Increase
% Change
3.2%
Proposed
Average Price
$/Therm
$0.07510
With the exception of the industrial class, IGC proposes to allocate the decrease to each of its customer classes in accordance with its Purchase Gas Cost Adjustment tariff and approved cost of service methodology.  (Reference Case Nos. INT-G-95-1, INT-G-88-2, U-1034-137).  Because there are no fixed costs currently recovered in the tail block of IGC’s T-1 tariff and because the proposed decrease in the T-1 tariff is related to fixed costs, a ¢/therm decrease is made only to the first two blocks of the T-1 tariff.
IGC contends that the overall price decrease requested will not affect its earnings and is fair, just and equitable.  Additionally, the Company requests cancellation of its LV-1A tariff.  The purpose of the tariff was “to pass through adjustments in purchased gas costs [to large volume firm service sales customers] resulting from adjustments in the rates of [NWP], pursuant to a tariff approved by the Federal Energy Regulatory Commission authorizing pipeline commodity rate changes on one day’s notice.”  The Company contends that the tariff is obsolete and serves no functional purpose in today’s “open access” environment.  IGC contends that the public interest does not require suspension of the Application or further investigation into its reasonableness by hearing.  The Company requests that the matter be processed under Modified Procedure, i.e., by written submission rather than by hearing.  The Company requests an effective implementation date of July 1, 1995.  
COMMISSION DECISION
Staff recommends that this matter be processed under Modified Procedure.  What is the Commission’s preference?

Scott D. Woodbury
JR\M-INT-G-95-3.SW