Residential Building Stock Assessment – Metering (RBSA Metering) is a project of unusually large scope in a region already uncommonly committed to large-scale primary research. Its goals are broad: update a swath of load shapes for the first time in twenty-five years, assess the major determinants of residential energy use, and identify opportunities for energy savings for programs across the region. The project lays the foundation for updating the Northwest’s approach to subjects including load forecasting, wind integration, capacity planning, demand response, the smart grid, and energy efficiency. All these topics benefit from, if not require, the direct time-of-use measurements of energy use that this project delivers.