20220121Final Approved Tariffs.pdf

January 17, 2022

Ms. Jan Noriyuki
Commission Secretary
Idaho Public Utilities Commission
P.O. Box 83720
Boise, ID 83720-0074

RE: Case No. INT-G-21-05

Dear Ms. Noriyuki:

The following tariff sheets are enclosed for electronic submission with the Commission in
compliance with Commission Order No. 35279 in the above referenced case.

Section C - Fourth Revised Sheet No. 3 Cancelin Section C - Thir Revised Sheet No. 3
Section C - Fourth Revised Sheet No. 4 Cancelin Section C - Thir Revised Sheet No. 4

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: Preston Carter

RECEIVED
2022 January 17, PM 12:30
IDAHO PUBLIC
UTILITIES COMMISSION
I.P.U.C. Gas Tariff
Section C
Fourth Revised Sheet No. 3
Name
of Utility

Intermountain Gas Company

Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: January 25, 2022

construction within six months of the date of the contract.
3.2 Relocation or abandonment of Company owned Gas Facilities will be at the expense of the
applicant when required by the applicant.
3.3 The applicant may be required to reimburse the Company for the installation, extension, or
abandonment of Gas Facilities if the terms of the signed agreement are not met.
3.4 The applicant shall indemnify and hold the Company harmless from liability for access for routine
maintenance, inspections, and emergencies, or for injury to property caused by the installation
of a Service.
3.5 The Company will install a single Service per applicant, unless the applicant requests an
additional Service. The Company may provide an additional Service on a case-by-case basis,
provided there is over one-hundred-feet between meter locations. Each Service must follow the
provisions of this section. The Company may waive the one-hundred-foot requirement when an
additional Service is required for Multifamily or Interruptible Snowmelt Service (Rate Schedules
IS-R and IS-C).
4. ALLOWABLE INVESTMENT
4.1 The Allowable Investment for Services and Mains is determined by first calculating the estimated
annual therm usage and then applying the Allowable Investment Factor per therm.
4.2 The estimated annual therm usage is calculated as follows:
(a) For residential applicants:
When natural gas is the primary heat source, calculate the estimated annual space heating
therm usage by multiplying the square foot factor of 0.234 by the square footage of the home.
To the estimated annual space heating therm usage, add gas appliance annual therm usage
estimates from the chart below, as applicable, to calculate the total estimated therm usage
per year. Gas appliances not on this list can be estimated by the Company on a case-by-
case basis. In residential Developments where specific appliances are unknown at the time
of calculation, the Company will base therm estimates on only the estimated annual space
heating therm usage plus the water heater therm estimate.

Natural Gas Appliances Annual Therm
Estimates
Ran e 23
Seasonal Fireplace 50
Grill 15
Clothes Dr er 28
Water Heater 240

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Jan. 21, 2022 Jan. 25, 2022
Per O.N. 35279
Jan Noriyuki Secretary
I.P.U.C. Gas Tariff
Section C
Fourth Revised Sheet No. 4
Name
of Utility

Intermountain Gas Company

Issued by: Intermountain Gas Company
By: Lori A. Blattner Title: Director – Regulatory Affairs
Effective: January 25, 2022

(b) For commercial applicants:
The therm usage estimate will be determined by the Company on a case-by-case basis. The
estimate will be based on the climate zone, the heated structure square footage, commercial
property type, and applicable gas appliances.
4.3 To determine the Allowable Investment per applicant, multiply the estimated annual therm usage
per applicant by the applicable Allowable Investment Factor below to calculate the Allowable
Investment in dollars:

Allowable Investment Factors
Customer Type Service Main Combined
Residential 0.612 0.674 1.286
Commercial 0.459 0.505 0.964

4.4 The applicant agrees to install and activate gas appliances pursuant to the signed agreement(s)
and the therm usage estimates used to determine the Allowable Investment.
4.5 The Company may calculate the Allowable Investment for applicants with structures or business
operations which are non-permanent on a case-by-case basis.
5. PROJECT COST
5.1 In the event the Company can defray any of the trench and backfill costs, for example by sharing
a trench with other utilities, the cost reduction will be included in the Main extension cost or
Service cost estimates.
5.2 The Service Line Project Cost estimate is determined by multiplying the on-property Service Line
length by $13.66 per foot.
5.3 The Main Extension Project Cost estimate is based on the Gas Facilities (excluding Services)
required to serve the gas load of the requesting applicant. This includes but is not limited to
Main, regulator stations, valves and Main fittings.
(a) The Company will provide a Project Cost estimate to the applicant prior to execution of an
agreement.
(b) The estimate will exclude costs for Company Betterment.
(c) The Company includes construction overhead charges in the amount of 9.92%.
(d) The Main extension Project Cost will be divided by the number of estimated Service Points
to calculate the Main extension Project Cost per applicant.
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Jan. 21, 2022 Jan. 25, 2022
Per O.N. 35279
Jan Noriyuki Secretary