The Washington Department of Ecology contracted Nuka Research to conduct an oil spill response capacity analysis for Grays Harbor, Washington. The purpose of the study is to better understand response capacity for the area if all resources in current planning were deployed for a major oil spill response there. The study does not consider all aspects of a response, but instead applies the publicly available Response Options Calculator (ROC) developed by Genwest Systems, Inc. for the National Oceanic and Atmospheric Administration to model maximum potential response capacity for a base case spill. Additional scenarios are then modeled in the ROC to answer a series of research questions. The Grays Harbor Safety Committee and other stakeholders provided input to the development of the base case and research questions through workshops held in April and December 2018. This study followed on a similar project conducted for San Juan County focused on the San Juan Islands area. Sierra and Alisha were directly involved in this project.