UTC Case Docket Document Sets

Filing UG - 240312

Company: Northwest Natural Gas Company

DBA:

Filing Type: Plan

Case Status: Pending

Dates (Opened & Effective): 05/01/2024 & 05/13/2026

Summary: 2025 NW Natural Gas Company Natural Gas Integrated Resource Plan pursuant to WAC 480-90-238.

Document Type	Date	Description
Letter	04/10/2026	Northwest Natural Gas 2025 IRP Acknowledgement Letter. UG-240312 POS.pdf 79 KB UG-240312 - NW Natural Acknowledgement Letter.pdf 385 KB
Document	12/12/2025	Appendix L.1 Supplement to 2025 Integrated Resource Plan, on behalf of Northwest Natural Gas Company, dba NW Natural, from Eric Nelsen. 240312-NWN-2025-IRP-Apdx-L-1-Supplement-COS-12-25.pdf 125 KB 240312-NWN-2025-IRP-Apdx-L-1-Supplement-CLtr-12-12-25.pdf 999 KB 240312-NWN-2025-IRP-Apdx-L-1-Supplement-12-12-25.pdf 27 MB
Comment	12/04/2025	Joint filing comments regarding Appendix A, on behalf of Cascade Natural Gas Corporation, Northwest Natural Gas Company d/b/a NW Natural, and Puget Sound Energy, from Darcy Neigum, Eric Nelsen and Jason Kuzma. 231023-CNGC-NWN-PSE-Cmt-12-04-25.pdf 879 KB
Comment	12/03/2025	Joint comments on regarding Staff's Appendix A, on behalf of, Cascade Natural Gas, NW Natural, and Puget Sound Energy regarding Staff's Appendix A, from Erica Lee-Pella. 240312-CNGC-NWN-PSE-Cmt-12-03-25.pdf 855 KB
Comment	12/03/2025	Comments, on behalf of Northwest Natural Gas Company d/b/a NW Natural, from Andrew Sprott. 240312-NWN-Cmt-12-03-25.pdf 1 MB 240312-NWN-Cmt-COS-12-03-25.pdf 133 KB
Presentation	10/22/2025	2025 Integrated Resource Plan Presentation, on behalf of Northwest Natural Gas Company d/b/a NW Natural, from Zachary Kravitz. 240312-NWN-Presentation-10-22-25.pdf 2 MB 240312-NWN-Presentation-CLtr_10-22-25.pdf 922 KB 240312-NWN-Presentation-COS-10-22-25.pdf 129 KB
Response	10/21/2025	Response to Staff Comments, on behalf of Northwest Natural Gas Company d/b/a NW Natural, from Zachary Kravitz. 240312-NWN-Resp-COS-10-21-25.pdf 130 KB 240312-NWN-Resp-10-21-25.pdf 279 KB
Presentation	10/21/2025	The presentation outlines the October 22, 2025 Recessed Open Meeting for NW Natural’s 2025 Gas IRP. It covers virtual ground rules, agenda timing, and structure. 2025 NW Natural's Gas IRP Recessed Open Meeting.pptx 985 KB
Comment	10/17/2025	Appendix A to Staff's Comments regarding NW Natural’s 2025 Integrated Resource Plan. UG-240312 Staff Comments Appendix A.pdf 634 KB
Comment	10/16/2025	Comments regarding NW Natural's 2025 Integrated Resource Plan (IRP), on behalf of Public Counsel, from Jean Marie Dreyer. 240312_PC_COS_10-16-2025.pdf 170 KB 240312 NWN IRP_PC Comments-10-16-2025.pdf 964 KB
Comment	10/16/2025	Comments from Commission Staff regarding NW Natural's 2025 Integrated Resource Plan. UG-240312 2025 IRP Staff Comments.pdf 491 KB
Workpapers	09/03/2025	Redacted 2025 Integrated Resource Plan Workpapers, on behalf of Northwest Natural Gas Company d/b/a NW Natural, from Rebecca Trujillo. 240312-NWN-WP-PRS-Compliance-OR-RNG-Targets-09-03-25.csv 0 KB 240312-NWN-WP-S7-Demand-Daily-Demand-09-03-25.csv 1 MB 240312-NWN-WP-S4-Storage-Max-Volume-09-03-25.csv 23 KB 240312-NWN-WP-S5-Storage-Max-Volume-09-03-25.csv 25 KB 240312-NWN-WP-Storage-Withdrawal-Fuel-Rate-09-03-25.csv 16 KB 240312-NWN-WP-WA-LFG-High-Quantity-09-03-25.csv 142 KB 240312-NWN-WP-Storage-Min-Volume-09-03-25.csv 349 KB 240312-NWN-WP-Compliance-Low-Carbon-Fuels-Quantity-Year-09-03-25.csv 15 KB 240312-NWN-WP-PRS-Pipeline-Reservation-Volume-09-03-25.csv 68 KB 240312-NWN-WP-MC-Supply-Price-RNG-09-03-25.csv 8 MB 240312-NWN-WP-Storage-Max-Withdrawal-Day-Warm-Weather-09-03-25.csv 400 KB 240312-NWN-WP-S4-Storage-Max-Withdrawal-Day-09-03-25.csv 608 KB 240312-NWN-WP-OR-SM-Biomass-Low-Quantity-09-03-25.csv 158 KB 240312-NWN-WP-S6-Demand-Daily-Demand-09-03-25.csv 1 MB 240312-NWN-WP-OR-CCUS-DAC-Quantity-09-03-25.csv 119 KB 240312-NWN-WP-MC-Supply-Price-Allowances-09-03-25.csv 172 KB 240312-NWN-WP-OR-GHS-Quantity-09-03-25.csv 144 KB 240312-NWN-WP-MC-Supply-Price-Opal-09-03-25.csv 56 MB 240312-NWN-WP-Demand-Daily-Demand-09-03-25.csv 1 MB 240312-NWN-WP-OR-SM-Biomass-High-Quantity-09-03-25.csv 144 KB 240312-NWN-WP-WA-SM-GHW-Quantity-09-03-25.csv 159 KB 240312-NWN-WP-WA-GHW-Quantity-09-03-25.csv 142 KB 240312-NWN-WP-2025-IRP-300-Draw-MC-Capacity-Results-09-03-25.xlsx 1 MB 240312-NWN-WP-Storage-Min-Storage-Target-Percent-Mist-No-Longer-Required-to-be-Full-2040-09-03-25.csv 359 KB 240312-NWN-WP-WA-WW-High-Quantity-09-03-25.csv 157 KB 240312-NWN-WP-S7-Demand-Peak-Day-Demand-09-03-25.csv 2 KB 240312-NWN-WP-WA-AM-Low-Quantity-09-03-25.csv 156 KB 240312-NWN-WP-Storage-Max-Withdrawal-Day-Design-Weather-09-03-25.csv 596 KB 240312-NWN-WP-2025-Alternative-Fuels-Resources-09-03-25.xlsx 448 KB 240312-NWN-WP-WA-WW-Low-Quantity-09-03-25.csv 159 KB 240312-NWN-WP-Miscellaneous-Existing-Resource-Stack-09-03-25.csv 4 KB 240312-NWN-WP-Supply-Compliance-Credit-Price-09-03-25.csv 3 KB 240312-NWN-WP-2025-IRP-Reference-Case-Customer-Count-Forecast-09-03-25.xlsx 26 KB 240312-NWN-WP-WA-CCUS-Industrial-Quantity-09-03-25.csv 160 KB 240312-NWN-WP-S1b-Compliance-Low-Carbon-Fuels-Quantity-Year-09-03-25.csv 14 KB 240312-NWN-WP-MC-Supply-Price-RTC-Purchase-09-03-25.csv 173 KB 240312-NWN-WP-S5-Storage-Max-Injection-Day-09-03-25.csv 19 KB 240312-NWN-WP-S6-Storage-Max-Withdrawal-Day-09-03-25.csv 540 KB 240312-NWN-WP-S1c-Supply-RNG-Prices-09-03-25.csv 11 KB 240312-NWN-WP-WA-SM-GHS-Quantity-09-03-25.csv 159 KB 240312-NWN-WP-Storage-Max-Volume-09-03-25.csv 23 KB 240312-NWN-WP-Supply-Compliance-Credit-Price-AllowanceLowPrice-09-03-25.csv 3 KB 240312-NWN-WP-Supply-Must-Take-Daily-Supplies-09-03-25 (R).pdf 120 KB 240312-NWN-WP-S7-Pipeline-Reservation-Volume-09-03-25.csv 63 KB 240312-NWN-WP-S5-Demand-Peak-Day-Demand-09-03-25.csv 2 KB 240312-NWN-WP-Supply-Baseload-and-Hedged-Gas-Prices-09-03-25.csv 15 KB 240312-NWN-WP-MC-Supply-Price-AECO-09-03-25.csv 56 MB 240312-NWN-WP-OR-SM-GHW-Quantity-09-03-25.csv 158 KB 240312-NWN-WP-WA-FW-Low-Quantity-09-03-25.csv 141 KB 240312-NWN-WP-2025-IRP-Scenario-Compliance-Results-09-03-25.xlsx 553 KB 240312-NWN-WP-WA-AM-High-Quantity-09-03-25.csv 159 KB 240312-NWN-WP-Supply-Synthetic-Methane-Prices-09-03-25.csv 5 KB 240312-NWN-WP-S1c-Supply-RTC-Purchase-Prices-09-03-25.csv 0 KB 240312-NWN-WP-WA-FW-High-Quantity-09-03-25.csv 158 KB 240312-NWN-WP-OR-BH-Quantity-09-03-25.csv 138 KB 240312-NWN-WP-2025-IRP-Scenario-Capacity-and-Energy-Results-09-03-25.xlsx 620 KB 240312-NWN-WP-Pipeline-Flow-Charge-09-03-25.csv 2 MB 240312-NWN-WP-Pipeline-Fuel-Rate-09-03-25.csv 2 MB 240312-NWN-WP-Supply-RNG-Prices-09-03-25.csv 11 KB 240312-NWN-WP-WA-CCUS-DAC-Quantity-09-03-25.csv 120 KB 240312-NWN-WP-Demand-EITE-Load-09-03-25.csv 1 KB 240312-NWN-WP-Pipeline-Reservation-Volume-09-03-25.csv 70 KB 240312-NWN-WP-Compliance-Instruments-Quantity-Year-09-03-25.csv 2 KB 240312-NWN-WP-WA-GHS-Quantity-09-03-25.csv 144 KB 240312-NWN-WP-OR-LFG-Mid-Quantity-09-03-25.csv 146 KB 240312-NWN-WP-S1c-Supply-Hydrogen-Prices-09-03-25.csv 4 KB 240312-NWN-WP-S5-Demand-Daily-Demand-09-03-25.csv 1 MB 240312-NWN-WP-WA-TH-Quantity-09-03-25.csv 145 KB 240312-NWN-WP-S7-Storage-Max-Injection-Day-09-03-25.csv 19 KB 240312-NWN-WP-Supply-Spot-and-On-System-Contract-Volumes-09-03-25.csv 704 KB 240312-NWN-WP-Pipeline-Reservation-Charge-09-03-25.csv 140 KB 240312-NWN-WP-OR-FW-Low-Quantity-09-03-25.csv 141 KB 240312-NWN-WP-Storage-Reservation-Charge-Capacity-09-03-25.csv 13 KB 240312-NWN-WP-MC-Supply-Price-Sumas-09-03-25.csv 56 MB 240312-NWN-WP-PRS-Compliance-WA-RNG-Targets-09-03-25.csv 0 KB 240312-NWN-WP-Demand-Peak-Day-Demand-09-03-25.csv 2 KB 240312-NWN-WP-WA-BH-Quantity-09-03-25.csv 138 KB 240312-NWN-WP-2025-IRP-300-Draw-MC-Compliance-Results-09-03-25.xlsx 8 MB 240312-NWN-WP-Storage-Min-Storage-Target-Percent-09-03-25.csv 359 KB 240312-NWN-WP-Storage-Max-Injection-Day-09-03-25.csv 17 KB 240312-NWN-WP-S6-Storage-Max-Volume-09-03-25.csv 25 KB 240312-NWN-WP-MC-Demand-Sales-OR-09-03-25.csv 56 MB 240312-NWN-WP-Compliance-WA-RNG-Targets-09-03-25.csv 0 KB 240312-NWN-WP-Supply-Compliance-Credit-Price-AllowanceHighPrice-09-03-25.csv 4 KB 240312-NWN-WP-Storage-Injection-Fuel-Rate-09-03-25.csv 16 KB 240312-NWN-WP-S6-Demand-Peak-Day-Demand-09-03-25.csv 2 KB 240312-NWN-WP-Supply-Spot-and-On-system-Contract-Prices-09-03-25 (R).pdf 121 KB 240312-NWN-WP-WA-LFG-Low-Quantity-09-03-25.csv 158 KB 240312-NWN-WP-Storage-Reservation-Charge-Deliverability-Volumes-09-03-24.csv 9 KB 240312-NWN-WP-S1c-Compliance-Low-Carbon-Fuels-Quantity-Year-09-03-25.csv 14 KB 240312-NWN-WP-S1c-Supply-CCUS-Prices-09-03-25.csv 3 KB 240312-NWN-WP-MC-Supply-Price-West-Coast-Station-2-09-03-25.csv 56 MB 240312-NWN-2025-IRP-WPs-CLtr-09-03-25.pdf 924 KB 240312-NWN-WP-OR-LFG-Low-Quantity-09-03-25.csv 158 KB 240312-NWN-WP-S6-Pipeline-Reservation-Volume-09-03-25.csv 66 KB 240312-NWN-WP-OR-GHW-Quantity-09-03-25.csv 145 KB 240312-NWN-WP-OR-TH-Quantity-09-03-25.csv 145 KB 240312-NWN-WP-Supply-Baseload-and-Hedged-Gas-Volumes-09-03-25.csv 13 KB 240312-NWN-WP-OR-SM-GHS-Quantity-09-03-25.csv 158 KB 240312-NWN-WP-OR-FW-High-Quantity-09-03-25.csv 158 KB 240312-NWN-WP-MC-Supply-Price-Hydrogen-09-03-25.csv 3 MB 240312-NWN-WP-Compliance-OR-RNG-Targets-09-03-25.csv 0 KB 240312-NWN-WP-S7-Storage-Max-Withdrawal-Day-09-03-25.csv 600 KB 240312-NWN-WP-S4_Storage-Max-Injection-Day-09-03-25.csv 17 KB 240312-NWN-WP-OR-AM-Low-Quantity-09-03-25.csv 156 KB 240312-NWN-WP-OR-WW-High-Quantity-09-03-25.csv 157 KB 240312-NWN-WP-MC-Supply-Price-SM-09-03-25.csv 4 MB 240312-NWN-WP-OR-LFG-High-Quantity-09-03-25.csv 143 KB 240312-NWN-WP-MC-Demand-Transport-OR-09-03-25.csv 56 MB 240312-NWN-WP-S5-Storage-Max-Withdrawal-Day-09-03-25.csv 600 KB 240312-NWN-WP-S4-Demand-Peak-Day-Demand-09-03-25.csv 2 KB 240312-NWN-WP-OR-CCUS-Industrial-Quantity-09-03-25.csv 159 KB 240312-NWN-WP-2025-IRP-50-Draw-MC-Compliance-and-Capacity-Results-09-03-25.xlsx 78 KB 240312-NWN-WP-MC-Supply-Price-CCUS-09-03-25.csv 2 MB 240312-NWN-WP-Storage-Reservation-Charge-Deliverability-09-03-25.csv 23 KB 240312-NWN-WP-MC-Demand-Transport-WA-09-03-25.csv 56 MB 240312-NWN-WP-WA-LFG-Mid-Quantity-09-03-25.csv 146 KB 240312-NWN-WP-Supply-CCUS-Prices-09-03-25.csv 3 KB 240312-NWN-WP-OR-WW-Low-Quantity09-03-25.csv 159 KB 240312-NWN-WP-S1c-Supply-Synthetic-Methane-Prices-09-03-25.csv 6 KB 240312-NWN-WP-OR-AM-High-Quantity-09-03-25.csv 159 KB 240312-NWN-WP-Demand-Electrified-EITE-Load-09-03-25.csv 1 KB 240312-NWN-WP-WA-SM-Biomass-Low-Quantity-09-03-25.csv 157 KB 240312-NWN-WP-Supply-RTC-Purchase-Prices-09-03-25.csv 0 KB 240312-NWN-WP-MC-Demand-Sales-WA-09-03-25.csv 56 MB 240312-NWN-WP-Supply-Hydrogen-Prices-09-03-25.csv 4 KB 240312-NWN-WP-S7-Storage-Max-Volume-09-03-25.csv 25 KB 240312-NWN-WP-WA-SM-Biomass-High-Quantity-09-03-25.csv 144 KB 240312-NWN-WP-S6-Storage-Max-Injection-Day-09-03-25.csv 17 KB 240312-NWN-WP-S4-Demand-Daily-Demand-09-03-25.csv 1 MB
Notice - Opportunity to file Written Comment	08/25/2025	Notice of Opportunity to File Written Comments (Due Thursday, October 16, 2025, by 5:00 p.m. and Notice of Recessed Open Meeting (To be held at 1:30 p.m., Wednesday, October 22, 2025). UG-240312 POS.pdf 79 KB UG-240312 NW Natural 2025 Notice to Comment and ROM.pdf 306 KB
Plan	08/01/2025	Redacted 2025 Integrated Resource Plan, on behalf of Northwest Natural Gas Company d/b/a NW Natural, from Rebecca Trujillo. 240312-NWN-2025-IRP-08-01-25.pdf 52 MB 240312-NWN-2025-IRP-CLtr-08-01-25.pdf 923 KB 240312-NWN-2025-IRP-COS-08-01-25.pdf 127 KB 240312-NWN-2025-IRP-Appendices-08-01-25 (R).pdf 13 MB
Plan	10/04/2024	Updated 2025 Integrated Resource Work Plan, on behalf of Northwest Natural Gas Company d/b/a NW Natural, from Rebecca Trujillo. 240312-NWN-IRP-Work-Plan-Update-10-04-24.pdf 169 KB 240312-NWN-IRP-Work-Plan-Update-COS-10-04-24.pdf 114 KB 240312-NWN-IRP-Work-Plan-Update-CLtr-10-04-24.pdf 941 KB
MAIN SERVICE LIST	04/10/2026	MAIN SERVICE LIST 240312 Main Service List.pdf 74 KB
Initial Filing	05/01/2024	2025 Integrated Resource Plan, on behalf of Northwest Natural Gas Company d/b/a NW Natural, from Rebecca Trujillo. 240312-NWN-IRP-Work-Plan-COS-05-01-24.pdf 113 KB 240312-NWN-IRP-Work-Plan-05-01-24.pdf 466 KB 240312-NWN-IRP-Work-Plan-CLtr-05-01-24.pdf 884 KB