Intergrated Resource Plan (IRP)



Lewis PUD has complete development of its 2012 Integrated Resource Plan (IRP) as required by state law, RCW 19.280 and is posted on this site.

The 2012 IRP outlines the sources of power needed to supply Lewis PUD customers through 2022. It describes the mix of resources from generation, conservation and efficiency that will meet current and projected needs at the lowest reasonable cost and risk to the utility and its customer-owners. 

Key elements of the IRP include: a finding of resource needs, focusing on the first 10 years of a 20-year planning period; the preferred portfolio of supply-side and demand-side resources to meet this need; and an action plan that identifies the steps we will take during the next two to four years to implement the plan.

The IRP uses system modeling tools as part of its analytical framework to determine the long-run economic and operational performance of alternative resource portfolios. These models simulate the integration of new resource alternatives with our existing assets, thereby informing the selection of a preferred portfolio judged to be the most cost-effective resource mix after considering risk, supply reliability, uncertainty, and government energy resource policies.

Base Case Forecast (Energy)

RCW 19.280.030 Development of a resource plan — Requirements of a resource plan.

Each electric utility must develop a plan consistent with this section.

(1) Utilities with more than twenty-five thousand customers that are not full requirements customers shall develop or update an integrated resource plan by September 1, 2008. At a minimum, progress reports reflecting changing conditions and the progress of the integrated resource plan must be produced every two years thereafter. An updated integrated resource plan must be developed at least every four years subsequent to the 2008 integrated resource plan. The integrated resource plan, at a minimum, must include….please refer to RCW 19.280.030.