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HomeMy WebLinkAbout20260105Compliance Filing.pdf RECEIVED JANUARY 5, 2026 IDAHO PUBLIC INTERMOUNTAIN° UTILITIES COMMISSION GAS COMPANY A Subsidiary of MDU Resources Group,Inc. In the Community to Serve® January 5, 2026 Monica Barrios-Sanchez Commission Secretary Idaho Public Utilities Commission P.O. Box 83720 Boise, ID 83720-0074 RE: Case No. INT-G-25-02, Compliance Filing Dear Ms. Barrios-Sanchez: In compliance with Commission Order No. 36889 in Case No. INT-G-25-02, Intermountain Gas Company is providing copies of its proposed tariffs with an effective date of January 1,2026. If you should have any questions regarding this report,please contact me at(509) 528-9223. Sincerely, Is/Michael Parvinen Michael Parvinen Director,Regulatory Affairs Intermountain Gas Company Enclosures cc: Preston N. Carter I.P.U.C. Gas Tariff Rate Schedules Sixteenth Revised Sheet No. 1 (Page 1 of 1) Name Intermountain Gas Company of Utilityp Y 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(per bill $11.00 Per Therm Charges Distribution Charge $0.12061 Property Tax $0.00329 Cost of Gas 1 Temporary Cost of Gas $0.08953 2 Weighted Average Cost of Gas $0.28734 3 Gas Transportation $0.20388 EE Charge $0.01149 Total Per Therm Charge $0.53708 PURHASED 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. PROPERTY TAX CHARGE: The Property Tax Charge is applied in accordance with House Bill 329 that was approved in the 2025 state legislature. 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. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Seventy-First Revised Sheet No. 3 (Page 1 of 2) Name Intermountain Gas Company of Utility 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(per bill $23.00 Per Therm Charges Distribution Charge Block One: First 200 Therms per bill $0.15294 Block Two: Next 1,800 Therms per bill $0.13349 Block Three: Next 8,000 Therms per bill $0.11472 Block Four: Over 10,000 Therms per bill $0.05793 Property Tax $0.00329 Cost of Gas 1 Temporary Cost of Gas $0.07969 2 Weighted Average Cost of Gas $0.28734 3 Gas Transportation $0.17833 EE Charge $0.00000 Total Per Therm Charge Block One: First 200 Therms per bill $0.54221 Block Two: Next 1,800 Therms per bill $0.52276 Block Three: Next 8,000 Therms per bill $0.50399 Block Four: Over 10,000 Therms per bill $0.44720 Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Seventy-First Revised Sheet No. 3 (Page 2 of 2) Name Intermountain Gas Company of Utility 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 (per bill $23.00 Per Therm Charges Distribution Charge Block One: First 10,000 Therms per bill $0.11472 Block Two: Over 10,000 Therms per bill $0.05793 Property Tax $0.00329 Cost of Gas 1 Temporary Cost of Gas $0.07969 2 Weighted Average Cost of Gas $0.28734 3 Gas Transportation $0.17833 Total Per Therm Charge Block One: First 10,000 Therms per bill $0.50399 Block Two: Over 10,000 Therms per bill $0.44720 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. PROPERTY TAX CHARGE: The Property Tax Charge is applied in accordance with House Bill 329 that was approved in the 2025 state legislature. 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. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Twenty-Seventh Revised Sheet No. 4 (Page 1 of 2 Name Intermountain Gas Com of Uti�it pan Y Rate Schedule IS-R RESIDENTIAL INTERRUPTIBLE SNOWMELT SERVICE APPLICABILITY: Applicable to any residential customer otherwise eligible to receive service under Rate Schedule IRS 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(per bill $11.00 Per Therm Charges Distribution Charge $0.12061 Property Tax $0.00329 Cost of Gas 1 Temporary Cost of Gas $0.08953 2 Weighted Average Cost of Gas $0.28734 3 Gas Transportation $0.20388 Total Per Therm Charge $0.52559 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. PROPERTY TAX CHARGE: The Property Tax Charge is applied in accordance with House Bill 329 that was approved in the 2025 state legislature. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Twenty-Sixth Revised Sheet No. 5 (Page 1 of 2 Name Intermountain Gas Company of usrt p Y 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 (per bill $23.00 Per Therm Charges Distribution Charge Block One: First 200 Therms per bill $0.15294 Block Two: Next 1,800 Therms per bill $0.13349 Block Three: Next 8,000 Therms per bill $0.11472 Block Four: Over 10,000 Therms per bill $0.05793 Property Tax $0.00329 Cost of Gas 1 Temporary Cost of Gas $0.07969 2 Weighted Average Cost of Gas $0.28734 3 Gas Transportation $0.17833 Total Per Therm Charge Block One: First 200 Therms per bill $0.54221 Block Two: Next 1,800 Therms per bill $0.52276 Block Three: Next 8,000 Therms per bill $0.50399 Block Four: Over 10,000 Therms per bill $0.44720 PROPERTY TAX CHARGE: The Property Tax Charge is applied in accordance with House Bill 329 that was approved in the 2025 state legislature. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Seventy-Eighth Revised Sheet No. 7 (Page 1 of 2 Name Intermountain Gas Company of Utility p Y 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: Customer Charge(per bill $375.00 Demand Charge (per MDFQ therm $0.44000 Per Therm Charges Distribution Charge Block One: First 35,000 Therms per bill $0.02052 Block Two: Next 35,000 Therms per bill $0.00812 Block Three: Over 70,000 Therms per bill $0.00503 Property Tax $0.00329 Cost of Gas 1 Temporary Cost of Gas $0.04321 2 Weighted Average Cost of Gas $0.28734 3 Gas Transportation $0.09913 Total Per Therm Charge Block One: First 35,000 Therms per bill $0.36707 Block Two: Next 35,000 Therms per bill $0.35467 Block Three: Over 70,000 Therms per bill $0.35158 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. PROPERTY TAX CHARGE: The Property Tax Charge is applied in accordance with House Bill 329 that was approved in the 2025 state legislature. 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. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Sixth Revised Sheet No. 7 (Page 2 of 2 Name Intermountain Gas Company of Utility p Y Rate Schedule LV-1 LARGE VOLUME FIRM SALES SERVICE (Continued) BILLING ADJUSTMENTS: 1. In the event that total deliveries to any new LV-1 customer did not meet the 200,000 therm threshold during the current contract period, an additional amount shall be billed. The additional amount shall be calculated by billing the customer's total usage during that contract period at the Rate Schedule GS-1 Block 3 rate, and then subtracting the amounts previously billed during the annual contract period. The customer's future eligibility for the LV-1 Rate Schedule will be renegotiated with the Company. 2. In the event that total deliveries to any existing LV-1 customer within the most recent three contract periods met or exceeded the 200,000 therm threshold, but the customer during the current contract period used less than the contract minimum of 200,000 therms, an additional amount shall be billed. The additional amount shall be calculated by billing the deficit usage below 200,000 therms at the LV- 1 Block 1 Distribution Cost rate. The customer's future eligibility for the LV-1 Rate Schedule will be renegotiated with the Company. 3. In the event the customer requires daily usage in excess of the MDFQ, and subject to the availability of firm interstate transportation to serve Intermountain's system, all such excess usage will be billed under Rate Schedule LV-1.Additionally, all excess MDFQ above the customer's contracted MDFQ for the month will be billed at the monthly Demand Charge rate. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Twenty-Eighth Revised Sheet No. 8 (Page 1 of 2 Name Intermountain Gas Company of Utility p Y Rate Schedule T-3 INTERRUPTIBLE DISTRIBUTION TRANSPORTATION SERVICE AVAILABILITY: Available at any mutually agreeable delivery point on the Company's distribution system to any customer upon execution of a one-year minimum written service contract for interruptible transportation service. MONTHLY RATE: Customer Charge (per bill $600.00 Per Therm Charges Distribution Charge Block One: First 100,000 Therms per bill $0.03682 Block Two: Next 50,000 Therms per bill $0.01499 Block Three: Over 150,000 Therms per bill $0.00552 Property Tax $0.00041 Temporary Cost of Gas $0.00069 Total Per Therm Charge Block One: First 100,000 Therms per bill $0.03654 Block Two: Next 50,000 Therms per bill $0.01471 Block Three: Over 150,000 Therms per bill $0.00524 ANNUAL MINIMUM BILL: The customer shall be subject to the payment of an annual minimum bill based on annual usage of 200,000 therms. The deficit usage below 200,000 therms shall be billed at the T-3 Block 1 rate. An annual minimum bill will not apply if the customer is a renewable natural gas production facility. 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. PROPERTY TAX CHARGE: The Property Tax Charge is applied in accordance with House Bill 329 that was approved in the 2025 state legislature. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Original Sheet No. 8 Page 2 of 2 Name Intermountain Gas Company of Utility p Y Rate Schedule T-3 INTERRUPTIBLE DISTRIBUTION TRANSPORTATION SERVICE 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. This service does not include the cost of the customer's gas supply or the interstate pipeline capacity. The customer is responsible for procuring its own supply of natural gas and transportation to Intermountain's distribution system under this Rate Schedule. 3. The customer understands and agrees that the Company is not responsible to deliver gas supplies to the customer which have not been nominated, scheduled, and delivered by the interstate pipeline to the designated city gate. 4. The Company, in its sole discretion, shall determine whether or not it has adequate capacity to accommodate transportation of the customer's gas supply on the Company's distribution system. 5. If requested by the Company, the customer expressly agrees to immediately curtail or interrupt its operations during periods of capacity constraints on the Company's distribution system. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Twenty-Sixth Revised Sheet No. 9 (Page 1 of 2 Name Intermountain Gas Company of usrt p Y Rate Schedule T-4 FIRM DISTRIBUTION ONLY TRANSPORTATION SERVICE AVAILABILITY: Available at any mutually agreeable delivery point on the Company's distribution system to any customer upon execution of a one year minimum written service contract for firm distribution transportation service in excess of 200,000 therms per year. MONTHLY RATE: Customer Charge (per bill $275.00 Demand Charge (per MDFQ therm $0.32398* Per Therm Charges Distribution Charge Block One: First 250,000 Therms per bill $0.02137 Block Two: Next 500,000 Therms per bill $0.00755 Block Three: Over 750,000 Therms per bill $0.00232 Property Tax $0.00041 Total Per Therm Charge Block One: First 250,000 Therms per bill $0.02178 Block Two: Next 500,000 Therms per bill $0.00796 Block Three: Over 750,000 Therms per bill $0.00273 *Includes Temporary Cost of Gas of($0.02602). 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. PROPERTY TAX CHARGE: The Property Tax Charge is applied in accordance with House Bill 329 that was approved in the 2025 state legislature. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026 I.P.U.C. Gas Tariff Rate Schedules Fifth Revised Sheet No. 9 (Page 2 of 2 Name Intermountain Gas Company of usrt p Y Rate Schedule T-4 FIRM DISTRIBUTION ONLY TRANSPORTATION SERVICE (Continued) 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. This service does not include the cost of the customer's gas supply of the interstate pipeline capacity. The customer is responsible for procuring its own supply of natural gas and transportation to Intermountain's distribution system under this Rate Schedule. 3. The customer understands and agrees that the Company is not responsible to deliver gas supplies to the customer which have not been nominated, scheduled, and delivered by the interstate pipeline to the designated city gate. 4. 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. 5. The monthly Demand Charge will be equal to the MDFQ times the Demand Charge rate. Demand Charge relief will be afforded to those T-4 customers when circumstances impacted by force majeure events prevent the Company from delivering natural gas to the customer's meter. BILLING ADJUSTMENTS: 1. In the event that total deliveries to any new T-4 customer did not meet the 200,000 therm threshold during the current contract period, an additional amount shall be billed. The additional amount shall be calculated by billing the customer's total usage during that contract period at the Rate Schedule GS-1 Block 3 rate, adjusted for the cost of gas, and then subtracting the amounts previously billed during the annual contract period. The customer's future eligibility for the T-4 Rate Schedule will be renegotiated with the Company. 2. In the event that total deliveries to any existing T-4 customer within the most recent three contract periods met or exceeded the 200,000 therm threshold, but the customer during the current contract period used less than the contract minimum of 200,000 therms, an additional amount shall be billed. The additional amount shall be calculated by billing the deficit usage below 200,000 therms at the T- 4 Block 1 rate. The customer's future eligibility for the T-4 Rate Schedule will be renegotiated with the Company. 3. In the event the customer requires daily usage in excess of the MDFQ, and subject to the availability of firm distribution capacity to serve Intermountain's system, all such excess usage will be billed under rate schedule T-4. Additionally, all excess MDFQ above the customer's contracted MDFQ for the month will be billed at the monthly Demand Charge rate. Issued by: Intermountain Gas Company By: Michael Parvinen Title: Director—Regulatory Affairs Effective: January 1, 2026