20220531Application.pdf

May 31, 2022
Ms. Jan Noriyuki
Commission Secretary
Idaho Public Utilities Commission
P.O. Box 83720
Boise, ID 83720-0074
RE: Case No. INT-G-22-02
Dear Ms. Noriyuki:
Attached for consideration by this Commission is an electronic submission of Intermountain Gas
Company’s Interim Purchased Gas Cost Adjustment Filing with prices proposed to be effective on
August 1, 2022.
If you should have any questions regarding the attached, please don’t hesitate to contact me at (208)
377-6015.
Sincerely,
Lori A. Blattner
Director, Regulatory Affairs
Intermountain Gas Company
Enclosure
cc: Mark Chiles
Preston Carter
RECEIVED
2022 MAY 31 PM 2:52
IDAHO PUBLIC
UTILITIES COMMISSION

INTERMOUNTAIN GAS COMPANY
CASE NO. INT-G-22-02

APPLICATION
AND EXHIBITS

In the Matter of the Application of INTERMOUNTAIN GAS COMPANY
For Authority to Change its Prices on August 1, 2022

(Interim August 1, 2022 Purchased Gas Cost Adjustment Filing)

INTERMOUNTAIN GAS COMPANY’S APPLICATION - 2
Preston N. Carter, ISB No. 8462
Givens Pursley LLP
601 W. Bannock St.
Boise, Idaho 83702
Telephone: [phone]

Attorneys for Intermountain Gas Company

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

In the Matter of the Application of
INTERMOUNTAIN GAS COMPANY
for Authority to Change its Prices
Case No. INT-G-22-02

APPLICATION

Intermountain Gas Company (“Intermountain” or “Company”), a subsidiary of MDU
Resources Group, Inc. with general offices located at 555 South Cole Road, Boise, Idaho, pursuant
to the Rules of Procedure of the Idaho Public Utilities Commission (“Commission”), hereby
requests authority, pursuant to Idaho Code Sections 61-307 and 61-622, to place into effect August
1, 2022 new rate schedules which will increase rates for its RS, GS-1, IS-R, IS-C, and LV-1
customer classes. The proposed changes will increase the Company’s annualized revenues by
approximately $67 million, however, Intermountain’s earnings will not be increased as a result of
the proposed changes in prices and revenues. Exhibit No. 1 is a summary of the overall price
changes by class of customer and is attached and incorporated by reference. Intermountain’s current
rate schedules showing proposed changes are attached as Exhibit No. 2 and incorporated by
reference. The resulting proposed rate schedules are attached as Exhibit No. 3 and incorporated by
reference.
Please address communications regarding this Application to:
Lori A. Blattner
Director – Regulatory Affairs
Intermountain Gas Company
Post Office Box 7608
Boise, Idaho 83707

INTERMOUNTAIN GAS COMPANY’S APPLICATION - 3
[e-mail]
and
Preston N. Carter
Givens Pursley LLP
601 W. Bannock St.
Boise, Idaho 83702
[e-mail]
[e-mail]

In support of this Application, Intermountain alleges and states as follows:
I.
Intermountain is a gas utility, subject to the jurisdiction of the Commission, engaged in the
sale of and distribution of natural gas within the State of Idaho under authority of Commission
Certificate No. 219, issued December 2, 1955, as amended and supplemented by Order No. 6564,
dated October 3, 1962.
Intermountain provides natural gas service to the following Idaho communities and counties
and adjoining areas:
Ada County - Boise, Eagle, Garden City, Kuna, Meridian, and Star;
Bannock County - Arimo, Chubbuck, Inkom, Lava Hot Springs, McCammon, and Pocatello;
Bear Lake County - Georgetown, and Montpelier;
Bingham County - Aberdeen, Basalt, Blackfoot, Firth, Fort Hall, Moreland/Riverside, and Shelley;
Blaine County - Bellevue, Hailey, Ketchum, and Sun Valley;
Bonneville County - Ammon, Idaho Falls, Iona, and Ucon;
Canyon County - Caldwell, Greenleaf, Middleton, Nampa, Parma, and Wilder;
Caribou County - Bancroft, Grace, and Soda Springs;
Cassia County - Burley, Declo, Malta, and Raft River;
Elmore County - Glenns Ferry, Hammett, and Mountain Home;
Fremont County - Parker, and St. Anthony;
Gem County - Emmett;
Gooding County - Bliss, Gooding, and Wendell;
Jefferson County - Lewisville, Menan, Rigby, and Ririe;
Jerome County - Jerome;
Lincoln County - Shoshone;
Madison County - Rexburg, and Sugar City;
Minidoka County - Heyburn, Paul, and Rupert;
Owyhee County - Bruneau, Marsing, and Homedale;
Payette County - Fruitland, New Plymouth, and Payette;
Power County - American Falls;
Twin Falls County - Buhl, Filer, Hansen, Kimberly, Murtaugh, and Twin Falls;

INTERMOUNTAIN GAS COMPANY’S APPLICATION - 4
Washington County - Weiser.
Intermountain's properties in these locations consist of transmission pipelines, liquefied
natural gas storage facilities, compressor stations, distribution mains, services, meters and
regulators, and general plant and equipment.
II.
With this Application, Intermountain seeks to pass through to each of its customer classes
changes in gas related costs resulting from an increase in the Company’s Weighted Average Cost of
Gas (“WACOG”). If approved, these changes would result in a price increase to Intermountain’s
RS, GS-1, IS-R, IS-C, and LV-1 customer classes, which are affected by and subject to
Intermountain’s Rate Schedule PGA, initially approved by this Commission in Order No. 26109,
Case No. INT-G-95-1, and additionally approved through subsequent proceedings.
III.
The Commission approved the current prices related to the cost of gas in Order No. 35182,
Case No. INT-G-21-04.
IV.
Over the last several months, natural gas prices have climbed across the United States
including in the three supply basins that affect the Company’s weighted average cost of
gas. Several factors contribute to this increase. First, as the country has slowly come out of the
main COVID-19 pandemic—or, at least, as restrictions related to COVID-19 have eased—the
demand for natural gas has exceeded supply. This stems, at least in part, from the fact that many
producers have used revenue from increased gas prices to pay down debt rather than invest in
additional drilling activity. Additionally, the United States continues to export large amounts of
LNG to other countries, which has further diminished supply. Second, there is a concern that

INTERMOUNTAIN GAS COMPANY’S APPLICATION - 5
national storage gas levels will not be at ideal levels by November 1, 2022. Total storage on
November 1 is estimated to be approximately 3.4 TCF versus a preferred level of 3.9 TCF. The
expectation of tighter natural gas supplies this fall is putting upward pressure on forward prices.
Third, power generation using natural-gas powered resources has proven to be very resilient in the
face of higher gas prices, due in part to increasingly lower coal stockpiles. Finally, global events,
such as the war in Ukraine and the recent lockdowns in China, have further exacerbated supply-
chain issues around the country, which also contributes to the emotion in the market that is further
contributing to the rise in gas prices.
V.
Commission Order No. 35182 directed the Company to “notify the Commission promptly if
an interim filing is needed.” The Company respectfully submits that an interim filing is needed at
this time to update the Company’s currently approved WACOG rate to better reflect current natural
gas cost levels and reduce the amount of deferred gas costs that will need to be included in the
Company’s regular Purchased Gas Cost Adjustment (“PGA”) filing.
VI.
The proposed WACOG rate reflected in Intermountain’s proposed prices is $0.42405 per
therm. This compares to $0.26000 per therm currently included in the Company’s tariffs. The
resulting increase can be seen on Exhibit No. 1, Page 1, Column (f). Line Break Pricing has been
updated to reflect the proposed changes as shown on Exhibit No. 2, page 2, Line 19.
VII.
Intermountain believes that the WACOG rate proposed in this Application, subject to the
effect of actual supply and demand and based on current market conditions, provides today’s most
reasonable forecast of gas costs for the June 2022 – September 2022 period, and reflects a just, fair,

INTERMOUNTAIN GAS COMPANY’S APPLICATION - 6
and equitable change in gas costs to Intermountain’s RS, GS-1, IS-R, IS-C, and LV-1 customers.
Although the proposed WACOG reflects a significant price increase for all customers, the Company
is hopeful that this interim filing will mitigate the build-up of deferrals as well as provide a price
signal that will allow customers extra time to budget for the increased costs before the winter
heating season arrives.
VIII.
The Company does not propose to change its gas transportation cost or temporary purchased
gas cost adjustment rates at this time. These rates, along with an updated estimate of the WACOG
rate, will be adjusted as part of the Company’s regular PGA filing.
IX.
This Application has been brought to the attention of Intermountain’s customers through a
Customer Notice and by a Press Release sent to daily and weekly newspapers, and major radio and
television stations in Intermountain’s service area. The Press Release and Customer Notice are
attached and incorporated by reference.
X.
Intermountain requests that this matter be handled under modified procedure pursuant to
Rules 201-204 of the Commission’s Rules of Procedure. Intermountain stands ready for immediate
consideration of this matter.

INTERMOUNTAIN GAS COMPANY’S APPLICATION - 7
XI.
Intermountain respectfully petitions the Idaho Public Utilities Commission as follows:
a. That the proposed rate schedules submitted as Exhibit No. 3 be approved without
suspension and made effective as of August 1, 2022 in the manner shown on Exhibit
No. 3,
b. That this Application be heard and acted upon without hearing under modified procedure,
and
c. For such other relief as this Commission may determine proper.

DATED: May 31, 2022.

INTERMOUNTAIN GAS COMPANY GIVENS PURSLEY LLP

B B
Lori A. Blattne Preston N. Carte
Director – Regulatory Affairs Attorney for Intermountain Gas Company

EXHIBIT NO. 1

CASE NO. INT-G-22-02
INTERMOUNTAIN GAS COMPANY

SUMMARY OF PRICE CHANGES
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Exhibit No. 1 Case No. INT-G-22-02 Intermountain Gas Company Page 1 of 1

EXHIBIT NO. 2

CASE NO. INT-G-22-02
INTERMOUNTAIN GAS COMPANY

CURRENT TARIFFS
Showing Proposed Price Changes
(8 pages)

INTERMOUNTAIN GAS COMPANY
Comparison of Proposed August 1, 2022 Prices
To Currently Approved Prices
Line
No.Rate Class
Currently
Approved
Prices
Proposed
Adjustment
Proposed
August 1, 2022
Prices
(a)(b)(c)(d)
1 RS 0.59668$ 0.16405$ 0.76073$
2 GS-1
3 Block 1 0.60394 0.16405 0.76799
4 Block 2 0.58046 0.16405 0.74451
5 Block 3 0.55779 0.16405 0.72184
6 Block 4 0.48923 0.16405 0.65328
7 CNG Fuel
8 Block 1 0.55459 0.16405 0.71864
9 Block 2 0.48603 0.16405 0.65008
10 IS-R (1)0.57575 0.16405 0.73980
11 IS-C (2)
12 Block 1 0.60074 0.16405 0.76479
13 Block 2 0.57726 0.16405 0.74131
14 Block 3 0.55459 0.16405 0.71864
15 Block 4 0.48603 0.16405 0.65008
16 LV-1
17 Demand Charge 0.30000 - 0.30000
18 Block 1 0.37956 0.16405 0.54361
19 Block 2 0.36167 0.16405 0.52572
20 Block 3 0.28472 0.16405 0.44877
21 T-3
22 Block 1 0.03816 - 0.03816
23 Block 2 0.01532 - 0.01532
24 Block 3 0.00541 - 0.00541
25 T-4
26 Demand Charge 0.28189 - 0.28189
27 Block 1 0.02395 - 0.02395
28 Block 2 0.00847 - 0.00847
29 Block 3 0.00260 - 0.00260
(1)The IS-R price is based on the RS price and receives the same PGA adjustments
(2)The IS-C price is based on the GS-1 price and receives the same PGA adjustments
Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 1 of 8
INTERMOUNTAIN GAS COMPAN
Summary of Proposed Tariff Components and Line Break Pricin
Line
No.Description RS GS-1 LV-1
(a)(b)(c)(d)
1 Cost of Gas:
2 Temporary Purchased Gas Cost Adjustment(1)(0.01173)$ (0.00560)$ (0.00198)$
3 Weighted Average Cost of Gas 0.42405 0.42405 0.42405
4 Gas Transportation Cost (1)0.16443 0.16169 0.09154
5 Total Proposed Cost of Gas 0.57675$ 0.58014$ 0.51361$
6 Distribution Cost: (2)
7 Block 1 0.16305$ 0.18465$ 0.03000$
8 Block 2 0.16117 0.01211
9 Block 3 0.13850 0.00307
10 Block 4 0.06994
11 Demand Charge 0.30000
12 Energy Efficiency Charge 0.02093 (3)0.00320 (4)
13 Proposed Prices:
14 Block 1 0.76073$ 0.76799$ 0.54361$
15 Block 2 0.74451 0.52572
16 Block 3 0.72184 0.44877
17 Block 4 0.65328
18 Demand Charge 0.30000
19 Line Break Pricing (5)0.58848$
(1)See Case No. INT-G-21-04
(2)See Case No. GNR-U-18-01
(3)See Case No. INT-G-19-05
(4)See Case No. INT-G-20-04
(5)Sum of Lines 3 and 4, Column (b)
Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 2 of 8
I.P.U.C. Gas Tariff
Rate Schedules
Eighth Revised Sheet No. 1 (Page 1 of 1)
Name of Utility Intermountain Gas Company
Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: October 1, 2021
Rate Schedule RS
RESIDENTIAL SERVICE
APPLICABILITY:
Applicable to any customer using natural gas for residential purposes.
RATE:
Monthly minimum charge is the Customer Charge.
Customer Charge: $5.50 per bill
Per Therm Charge: $0.59668*
*Includes the following:
Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.01173)
2) Weighted average cost of gas $0.26000
3) Gas transportation cost $0.16443
Distribution Cost: $0.16305
EE Charge: $0.02093
PURCHASED GAS COST ADJUSTMENT:
This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.
ENERGY EFFICIENCY CHARGE ADJUSTMENT:
This tariff is subject to an adjustment for costs related to the Company’s Energy Efficiency program as
provided for in Rate Schedule EEC-RS. The Energy Efficiency Charge is separately stated on customer bills.
SERVICE CONDITIONS:
All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff, of
which this rate schedule is a part.
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Oct. 6, 2021 Oct. 1, 2021
Per O.N. 35182
Jan Noriyuki Secretary
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Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 3 of 8
I.P.U.C. Gas Tariff
Rate Schedules
Sixty-Third Revised Sheet No. 3 (Page 1 of 2)
Name of Utility Intermountain Gas Company
Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: December 1, 2021
Rate Schedule GS-1
GENERAL SERVICE
APPLICABILITY:
Applicable to customers whose requirements for natural gas do not exceed 2,000 therms per day, at any point
on the Company's distribution system. Requirements in excess of 2,000 therms per day may be allowed at
the Company’s discretion.
RATE:
Monthly minimum charge is the Customer Charge.
Customer Charge: $9.50 per bill
Per Therm Charge: Block One: First 200 therms per bill @ $0.60394*
Block Two: Next 1,800 therms per bill @ $0.58046*
Block Three: Next 8,000 therms per bill @ $0.55779*
Block Four: Over 10,000 therms per bill @ $0.48923*
*Includes the following:
Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.00560)
2) Weighted average cost of gas $0.26000
3) Gas transportation cost $0.16169
Distribution Cost: Block One: First 200 therms per bill @ $0.18465
Block Two: Next 1,800 therms per bill @ $0.16117
Block Three: Next 8,000 therms per bill @ $0.13850
Block Four: Over 10,000 therms per bill @ $0.06994
EE Charge: $0.00320
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Nov. 16, 2021 Dec. 1, 2021
Jan Noriyuki Secretary
6L[W\)RXUWK






$XJXVW
Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 4 of 8
I.P.U.C. Gas Tariff
Rate Schedules
Sixty-Third Revised Sheet No. 3 (Page 2 of 2)
Name of Utility Intermountain Gas Company
Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: December 1, 2021
Rate Schedule GS-1
GENERAL SERVICE
(Continued)
For separately metered deliveries of gas utilized solely as Compressed Natural Gas Fuel in vehicular internal
combustion engines.
Customer Charge: $9.50 per bill
Per Therm Charge: Block One: First 10,000 therms per bill @ $0.55459*
Block Two: Over 10,000 therms per bill @ $0.48603*
*Includes the following:
Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.00560)
2) Weighted average cost of gas $0.26000
3) Gas transportation cost $0.16169
Distribution Cost: Block One: First 10,000 therms per bill @ $0.13850
Block Two: Over 10,000 therms per bill @ $0.06994
PURCHASED GAS COST ADJUSTMENT:
This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.
ENERGY EFFICIENCY CHARGE ADJUSTMENT:
This tariff is subject to an adjustment for costs related to the Company’s Energy Efficiency program as
provided for in Rate Schedule EEC-GS. The Energy Efficiency Charge is not applicable to gas utilized solely
as Compressed Natural Gas Fuel in vehicular internal combustion engines. The Energy Efficiency Charge is
separately stated on customer bills.
SERVICE CONDITIONS:
1. All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff,
of which this rate schedule is a part.
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Nov. 16, 2021 Dec. 1, 2021
Jan Noriyuki Secretary

$XJXVW
6L[W\)RXUWK



Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 5 of 8
I.P.U.C. Gas Tariff
Rate SchedulesNineteenth Revised Sheet No. 4 (Page 1 of 2)
Name of Utility Intermountain Gas Company
Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: December 1, 2021
Rate Schedule IS-R
RESIDENTIAL INTERRUPTIBLE SNOWMELT SERVICE
APPLICABILITY:
Applicable to any residential customer otherwise eligible to receive service under Rate Schedule RS who
has added natural gas snowmelt equipment after 6/1/2010. The intended use of the snowmelt equipment is
to melt snow and/or ice on sidewalks, driveways or any other similar appurtenances. Any and all such
applications meeting the above criteria will be subject to service under Rate Schedule IS-R and will be
separately and individually metered. All service hereunder is interruptible at the sole discretion of the
Company.
FACILITY REIMBURSEMENT CHARGE:
All new interruptible Snowmelt service customers are required to pay for the cost of the Snowmelt meter set
and other related facility and equipment costs, prior to the installation of the meter set. Any request to alter
the physical location of the meter set and related facilities from Company’s initial design may be granted
provided, however, the Company can reasonably accommodate said relocation and Customer agrees to
pay all related costs.
RATE:
Monthly minimum charge is the Customer Charge.
Customer Charge: $5.50 per bill
Per Therm Charge: $0.57575*
*Includes the following:
Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.01173)
2) Weighted average cost of gas $0.26000
3) Gas transportation cost $0.16443
Distribution Cost: $0.16305
PURCHASED GAS COST ADJUSTMENT:
This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Nov. 16, 2021 Dec. 1, 2021
Jan Noriyuki Secretary
7ZHQWLHWK


$XJXVW
Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 6 of 8
I.P.U.C. Gas Tariff
Rate SchedulesEighteenth Revised Sheet No. 5 (Page 1 of 2)
Name of Utility Intermountain Gas Company
Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: October 1, 2021
Rate Schedule IS-C
SMALL COMMERICAL INTERRUPTIBLE SNOWMELT SERVICE
APPLICABILITY:
Applicable to any customer otherwise eligible to receive gas service under Rate Schedule GS-1 who has
added natural gas snowmelt equipment after 6/1/2010. The intended use of the snowmelt equipment is to
melt snow and/or ice on sidewalks, driveways or any other similar appurtenances. Any and all such
applications meeting the above criteria will be subject to service under Rate Schedule IS-C and will be
separately and individually metered. All service hereunder is interruptible at the sole discretion of the
Company.
FACILITY REIMBURSEMENT CHARGE:
All new interruptible Snowmelt service customers are required to pay for the cost of the Snowmelt meter set
and other related facility and equipment costs, prior to the installation of the meter set. Any request to alter
the physical location of the meter set and related facilities from Company’s initial design may be granted
provided, however, the Company can reasonably accommodate said relocation and Customer agrees to pay
all related costs.
RATE:
Monthly minimum charge is the Customer Charge.
Customer Charge: $9.50 per bill
Per Therm Charge: Block One: First 200 therms per bill @ $0.60074*
Block Two: Next 1,800 therms per bill @ $0.57726*
Block Three: Next 8,000 therms per bill @ $0.55459*
Block Four: Over 10,000 therms per bill @ $0.48603*
*Includes the following:
Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.00560)
2) Weighted average cost of gas $0.26000
3) Gas transportation cost $0.16169
Distribution Charge: Block One: First 200 therms per bill @ $0.18465
Block Two: Next 1,800 therms per bill @ $0.16117
Block Three: Next 8,000 therms per bill @ $0.13850
Block Four: Over 10,000 therms per bill @ $0.06994
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Oct. 6, 2021 Oct. 1, 2021
Per O.N. 35182
Jan Noriyuki Secretary
1LQHWHHQWK





$XJXVW
Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 7 of 8
I.P.U.C. Gas Tariff
Rate SchedulesSeventieth Revised Sheet No. 7 (Page 1 of 2)
Name of Utility Intermountain Gas Company
Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: December 1, 2021
Rate Schedule LV-1
LARGE VOLUME FIRM SALES SERVICE
AVAILABILITY:
Available at any mutually agreeable delivery point on the Company's distribution system to any existing
customer receiving service under the Company’s rate schedule LV-1 or any customer not previously served
under this schedule whose usage does not exceed 500,000 therms annually, upon execution of a one-year
minimum written service contract for firm sales service in excess of 200,000 therms per year.
MONTHLY RATE:
Demand Charge: $0.30000 per MDFQ therm
Per Therm Charge: Block One: First 250,000 therms per bill @ $0.37956*
Block Two: Next 500,000 therms per bill @ $0.36167*
Block Three: Over 750,000 therms per bill @ $0.28472*
*Includes the following:
Cost of Gas: 1) Temporary purchased gas cost adjustment
Block One and Two ($0.00198)
Block Three $0.02165
2) Weighted average cost of gas $0.26000
3) Gas transportation cost (Block One and Two only) $0.09154
Distribution Cost: Block One: First 250,000 therms per bill @ $0.03000
Block Two: Next 500,000 therms per bill @ $0.01211
Block Three: Over 750,000 therms per bill @ $0.00307
PURCHASED GAS COST ADJUSTMENT:
This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.
SERVICE CONDITIONS:
1. All natural gas service hereunder is subject to the General Service Provisions of the Company's
Tariff, of which this Rate Schedule is a part.
2.The customer shall negotiate with the Company, a mutually agreeable Maximum Daily Firm Quantity
(MDFQ), which will be stated in and in effect throughout the term of the service contract.
3. The monthly Demand Charge will be equal to the MDFQ times the Demand Charge rate. Demand
Charge relief will be afforded to those LV-1 customers when circumstances impacted by force
majeure events prevent the Company from delivering natural gas to the customer’s meter.
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Nov. 16, 2021 Dec. 1, 2021
Jan Noriyuki Secretary
6HYHQW\)LUVW



$XJXVW
Exhibit No. 2 Case No. INT-G-22-02 Intermountain Gas Company Page 8 of 8

EXHIBIT NO. 3

CASE NO. INT-G-22-02
INTERMOUNTAIN GAS COMPANY

PROPOSED TARIFFS
(6 pages)

I.P.U.C. Gas Tariff
Rate Schedules
Ninth Revised Sheet No. 1 (Page 1 of 1)
Name
of Utility Intermountain Gas Company
Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: August 1, 2022
Rate Schedule RS
RESIDENTIAL SERVICE
APPLICABILITY:
Applicable to any customer using natural gas for residential purposes.
RATE:
Monthly minimum charge is the Customer Charge.
Customer Charge: $5.50 per bill
Per Therm Charge: $0.76073*
*Includes the following:
Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.01173)
2) Weighted average cost of gas $0.42405
3) Gas transportation cost $0.16443
Distribution Cost: $0.16305
EE Charge: $0.02093
PURCHASED GAS COST ADJUSTMENT:
This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.
ENERGY EFFICIENCY CHARGE ADJUSTMENT:
This tariff is subject to an adjustment for costs related to the Company’s Energy Efficiency program as
provided for in Rate Schedule EEC-RS. The Energy Efficiency Charge is separately stated on customer bills.
SERVICE CONDITIONS:
All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff, of
which this rate schedule is a part.
Exhibit No. 3 Case No. INT-G-22-02 Intermountain Gas Company Page 1 of 6
I.P.U.C. Gas Tariff
Rate Schedules
Sixty-Fourth Revised Sheet No. 3 (Page 1 of 2)
Name
of Utility

Intermountain Gas Company

Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: August 1, 2022

Rate Schedule GS-1
GENERAL SERVICE

APPLICABILITY:

Applicable to customers whose requirements for natural gas do not exceed 2,000 therms per day, at any point
on the Company's distribution system. Requirements in excess of 2,000 therms per day may be allowed at
the Company’s discretion.

RATE:

Monthly minimum charge is the Customer Charge.

Customer Charge: $9.50 per bill

Per Therm Charge: Block One: First 200 therms per bill @ $0.76799*
Block Two: Next 1,800 therms per bill @ $0.74451*
Block Three: Next 8,000 therms per bill @ $0.72184*
Block Four: Over 10,000 therms per bill @ $0.65328*

*Includes the following:

Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.00560)
2) Weighted average cost of gas $0.42405
3) Gas transportation cost $0.16169

Distribution Cost: Block One: First 200 therms per bill @ $0.18465
Block Two: Next 1,800 therms per bill @ $0.16117
Block Three: Next 8,000 therms per bill @ $0.13850
Block Four: Over 10,000 therms per bill @ $0.06994

EE Charge: $0.00320

Exhibit No. 3 Case No. INT-G-22-02 Intermountain Gas Company Page 2 of 6
I.P.U.C. Gas Tariff
Rate Schedules
Sixty-Fourth Revised Sheet No. 3 (Page 2 of 2)
Name
of Utility

Intermountain Gas Company

Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: August 1, 2022
Rate Schedule GS-1
GENERAL SERVICE
(Continued)

For separately metered deliveries of gas utilized solely as Compressed Natural Gas Fuel in vehicular internal
combustion engines.

Customer Charge: $9.50 per bill

Per Therm Charge: Block One: First 10,000 therms per bill @ $0.71864*
Block Two: Over 10,000 therms per bill @ $0.65008*

*Includes the following:

Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.00560)
2) Weighted average cost of gas $0.42405
3) Gas transportation cost $0.16169

Distribution Cost: Block One: First 10,000 therms per bill @ $0.13850
Block Two: Over 10,000 therms per bill @ $0.06994

PURCHASED GAS COST ADJUSTMENT:

This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.

ENERGY EFFICIENCY CHARGE ADJUSTMENT:

This tariff is subject to an adjustment for costs related to the Company’s Energy Efficiency program as
provided for in Rate Schedule EEC-GS. The Energy Efficiency Charge is not applicable to gas utilized solely
as Compressed Natural Gas Fuel in vehicular internal combustion engines. The Energy Efficiency Charge is
separately stated on customer bills.

SERVICE CONDITIONS:

1. All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff,
of which this rate schedule is a part.

Exhibit No. 3 Case No. INT-G-22-02 Intermountain Gas Company Page 3 of 6
I.P.U.C. Gas Tariff
Rate Schedules
Twentieth Revised Sheet No. 4 (Page 1 of 2)
Name
of Utility

Intermountain Gas Company

Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: August 1, 2022

Rate Schedule IS-R
RESIDENTIAL INTERRUPTIBLE SNOWMELT SERVICE

APPLICABILITY:

Applicable to any residential customer otherwise eligible to receive service under Rate Schedule RS who
has added natural gas snowmelt equipment after 6/1/2010. The intended use of the snowmelt equipment is
to melt snow and/or ice on sidewalks, driveways or any other similar appurtenances. Any and all such
applications meeting the above criteria will be subject to service under Rate Schedule IS-R and will be
separately and individually metered. All service hereunder is interruptible at the sole discretion of the
Company.

FACILITY REIMBURSEMENT CHARGE:

All new interruptible Snowmelt service customers are required to pay for the cost of the Snowmelt meter set
and other related facility and equipment costs, prior to the installation of the meter set. Any request to alter
the physical location of the meter set and related facilities from Company’s initial design may be granted
provided, however, the Company can reasonably accommodate said relocation and Customer agrees to
pay all related costs.

RATE:

Monthly minimum charge is the Customer Charge.

Customer Charge: $5.50 per bill

Per Therm Charge: $0.73980*

*Includes the following:

Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.01173)
2) Weighted average cost of gas $0.42405
3) Gas transportation cost $0.16443

Distribution Cost: $0.16305

PURCHASED GAS COST ADJUSTMENT:

This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.

Exhibit No. 3 Case No. INT-G-22-02 Intermountain Gas Company Page 4 of 6
I.P.U.C. Gas Tariff
Rate Schedules
Nineteenth Revised Sheet No. 5 (Page 1 of 2)
Name
of Utility

Intermountain Gas Company

Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: August 1, 2022

Rate Schedule IS-C
SMALL COMMERICAL INTERRUPTIBLE SNOWMELT SERVICE

APPLICABILITY:

Applicable to any customer otherwise eligible to receive gas service under Rate Schedule GS-1 who has
added natural gas snowmelt equipment after 6/1/2010. The intended use of the snowmelt equipment is to
melt snow and/or ice on sidewalks, driveways or any other similar appurtenances. Any and all such
applications meeting the above criteria will be subject to service under Rate Schedule IS-C and will be
separately and individually metered. All service hereunder is interruptible at the sole discretion of the
Company.

FACILITY REIMBURSEMENT CHARGE:

All new interruptible Snowmelt service customers are required to pay for the cost of the Snowmelt meter set
and other related facility and equipment costs, prior to the installation of the meter set. Any request to alter
the physical location of the meter set and related facilities from Company’s initial design may be granted
provided, however, the Company can reasonably accommodate said relocation and Customer agrees to pay
all related costs.

RATE:

Monthly minimum charge is the Customer Charge.

Customer Charge: $9.50 per bill

Per Therm Charge: Block One: First 200 therms per bill @ $0.76479*
Block Two: Next 1,800 therms per bill @ $0.74131*
Block Three: Next 8,000 therms per bill @ $0.71864*
Block Four: Over 10,000 therms per bill @ $0.65008*

*Includes the following:

Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.00560)
2) Weighted average cost of gas $0.42405
3) Gas transportation cost $0.16169

Distribution Charge: Block One: First 200 therms per bill @ $0.18465
Block Two: Next 1,800 therms per bill @ $0.16117
Block Three: Next 8,000 therms per bill @ $0.13850
Block Four: Over 10,000 therms per bill @ $0.06994

Exhibit No. 3 Case No. INT-G-22-02 Intermountain Gas Company Page 5 of 6
I.P.U.C. Gas Tariff
Rate Schedules
Seventy-First Revised Sheet No. 7 (Page 1 of 2)
Name
of Utility

Intermountain Gas Company

Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: August 1, 2022

Rate Schedule LV-1
LARGE VOLUME FIRM SALES SERVICE

AVAILABILITY:

Available at any mutually agreeable delivery point on the Company's distribution system to any existing
customer receiving service under the Company’s rate schedule LV-1 or any customer not previously served
under this schedule whose usage does not exceed 500,000 therms annually, upon execution of a one-year
minimum written service contract for firm sales service in excess of 200,000 therms per year.

MONTHLY RATE:

Demand Charge: $0.30000 per MDFQ therm

Per Therm Charge: Block One: First 250,000 therms per bill @ $0.54361*
Block Two: Next 500,000 therms per bill @ $0.52572*
Block Three: Over 750,000 therms per bill @ $0.44877*

*Includes the following:

Cost of Gas: 1) Temporary purchased gas cost adjustment
Block One and Two ($0.00198)
Block Three $0.02165
2) Weighted average cost of gas $0.42405
3) Gas transportation cost (Block One and Two only) $0.09154

Distribution Cost: Block One: First 250,000 therms per bill @ $0.03000
Block Two: Next 500,000 therms per bill @ $0.01211
Block Three: Over 750,000 therms per bill @ $0.00307

PURCHASED GAS COST ADJUSTMENT:

This tariff is subject to an adjustment for the cost of purchased gas as provided for in Rate Schedule PGA.
This adjustment is incorporated into the calculation of the Cost of Gas stated on customer bills.

SERVICE CONDITIONS:

1. All natural gas service hereunder is subject to the General Service Provisions of the Company's
Tariff, of which this Rate Schedule is a part.

2. The customer shall negotiate with the Company, a mutually agreeable Maximum Daily Firm Quantity
(MDFQ), which will be stated in and in effect throughout the term of the service contract.

3. The monthly Demand Charge will be equal to the MDFQ times the Demand Charge rate. Demand
Charge relief will be afforded to those LV-1 customers when circumstances impacted by force
majeure events prevent the Company from delivering natural gas to the customer’s meter.

Exhibit No. 3 Case No. INT-G-22-02 Intermountain Gas Company Page 6 of 6

NEWS RELEASE

and

CUSTOMER NOTICE

CASE NO. INT-G-22-02

INTERMOUNTAIN GAS COMPANY

(4 pages)

Intermountain Gas Company files price increase request as part of interim PGA

BOISE, ID – May 31, 2022 – Intermountain Gas Company today filed an interim purchased gas cost
adjustment (PGA) application with the Idaho Public Utilities Commission to increase its prices by
approximately 25.2% or $67 million. If approved, the increase would be effective Aug. 1, 2022.

The primary reason for the filing is a significant increase in the commodity price for natural gas. Over the last
several months, natural gas prices have climbed not only across the country, but also across the globe. A
rebound in demand, lower than average storage levels, high levels of liquified natural gas exports and other
global events have combined to create strong upward pressure on prices.

Intermountain typically files PGAs on an annual basis to balance out an over collection or under collection of
natural gas costs. Because commodity prices have increased so dramatically, the company filed an interim
increase to mitigate the under collection balance. If left unchanged until later in the year, the monthly increase
for customers would be greater because of the under collection balance.

Intermountain’s earnings will not increase as a result of this filing. Because the price Intermountain pays for
natural gas is passed through directly to customers, there is no financial benefit to the company from this
proposed price increase.

If approved, a typical residential customer would see an increase of $10.55, or 24.1%, per month based on
average weather and usage. Commercial customers, on average, would see an increase of $51.87, or 27%, per
month.

As a way to help customers better budget their energy costs, Intermountain offers a Level Pay program that
helps even out monthly payments. Customers struggling to pay their bills may also qualify for federal or state
energy assistance and should contact Intermountain to find out more or arrange a payment plan to help manage
any past due balance on their account.

“The economic rebound, coupled with a slow ramp up of drilling activity, also is playing a role in increased
commodity prices,” said Scott Madison, executive vice president of business development and gas supply for
Intermountain

Intermountain urges all customers to use energy wisely. For more information about the company’s energy
efficiency program and available rebates for installing high efficiency equipment, visit
www.intgas.com/saveenergy. Conservation tips, information on government payment energy assistance and
programs to help consumers level out their energy bills over the year can be found on the company’s website
www.intgas.com.

The request is a proposal and is subject to public review and approval by the PUC. A copy of the application is
available for review at the commission, its homepage www.puc.idaho.gov, as well as the company’s website
www.intgas.com. Written comments regarding the application may be filed with the commission. Customers
may also subscribe to the commission’s RSS feed to review periodic updates via email.

NEWS RELEASE
Intermountain Gas Company is a natural gas distribution company serving approximately 402,300 residential,
commercial and industrial customers in 74 communities in southern Idaho. Intermountain is a subsidiary of
MDU Resources Group, Inc., a Fortune 500 company and a member of the S&P MidCap 400 and the S&P
High-Yield Dividend Aristocrats indices, and is Building a Strong America® by providing essential products
and services through its regulated energy delivery and construction materials and services businesses. For
more information about MDU Resources, see the company’s website at www.mdu.com. For more information
about Intermountain, visit www.intgas.com.

Media Contact: Mark Hanson at 701-530-1093 or [e-mail].
Customer Notice
Intermountain Gas Company files price increase request as part of interim PGA
BOISE, ID | May 31, 2022 - Intermountain Gas Company today filed an interim purchased gas cost adjustment (PGA) application with
the Idaho Public Utilities Commission to increase its prices by approximately 25.2% or $67 million. If approved, the increase would be
effective Aug. 1, 2022.
The primary reason for the filing is a significant increase in the commodity price for natural gas. Over the last several months, natural gas
prices have climbed not only across the country, but also across the globe. A rebound in demand, lower than average storage levels,
high levels of liquified natural gas exports and other global events have combined to create strong upward pressure on prices.
Intermountain typically files PGAs on an annual basis to balance out an over collection or under collection of natural gas costs. Because
commodity prices have increased so dramatically, the company filed an interim increase to mitigate the under collection balance. If left
unchanged until later in the year, the monthly increase for customers would be greater because of the under collection balance.
Intermountain’s earnings will not increase as a result of this filing. Because the price Intermountain pays for natural gas is passed through
directly to customers, there is no financial benefit to the company from this proposed price increase.
If approved, a typical residential customer would see an increase of $10.55, or 24.1%, per month based on average weather and usage.
Commercial customers, on average, would see an increase of $51.87, or 27%, per month.
As a way to help customers better budget their energy costs, Intermountain offers a Level Pay program that helps even out
monthly payments. Customers struggling to pay their bills may also qualify for federal or state energy assistance and should
contact Intermountain to find out more or arrange a payment plan to help manage any past due balance on their account.
“The economic rebound, coupled with a slow ramp up of drilling activity, also is playing a role in increased commodity prices,” said
Scott Madison, executive vice president of business development and gas supply for Intermountain
Intermountain urges all customers to use energy wisely. For more information about the company’s energy efficiency program
and available rebates for installing high efficiency equipment, visit www.intgas.com/saveenergy. Conservation tips, information on
government payment energy assistance and programs to help consumers level out their energy bills over the year can be found on
the company’s website www.intgas.com.
The request is a proposal and is subject to public review and approval by the PUC. A copy of the application is available for review
at the commission, its homepage www.puc.idaho.gov, as well as the company’s website www.intgas.com. Written comments
regarding the application may be filed with the commission. Customers may also subscribe to the commission’s RSS feed to review
periodic updates via email.
Intermountain Gas Company | Customer Service: 800-548-3679 | M-F, 7:30am - 6:30pm | www.intgas.com