By rule, all electric (WAC 480-100-620) and natural gas (WAC 480-90-238) utilities regulated by the commission must create plans for how they will obtain future energy resources for their customers. An Integrated Resource Plan (IRP) is used to detail a utility company's long-term energy resource strategy. These plans describe how the company will meet future customer needs at the lowest cost to ratepayers. Utility companies must update their plans every two years.
UTC-regulated utilities most recent completed IRPs
- Avista Integrated Resource Plans
- Cascade Natural Gas Integrated Resource Plan
- Northwest Natural's Integrated Resource Plan
- Pacific Power Integrated Resource Plan
- Puget Sound Energy Integrated System Plan
UTC-regulated utilities in-progress or newly finalized IRPs
- Avista Electric Integrated Resource Plan (UE-230793)
- Avista Natural Gas Integrated Resource Plan (UG-240207)
- Cascade's Natural Gas Integrated Resource Plan (UG-231023)
- Northwest Natural Gas Integrated Resource Plan (UG-240312)
- Pacific Power Integrated Resource Plan (UE-230812)
- Puget Sound Energy Integrated System Plan (U-240841)