The Wilson Trusk Nestuccu watershed (HUC 17100203) covers an area of approximately 838 square miles in northwestern Oregon, USA. The watershed is characterized by steep terrain and receives significant precipitation, with an average annual rainfall of 70 inches. The snowpack in the watershed is generally moderate, with peaks in February and March. The watershed is home to several major reservoirs that provide drinking water and hydroelectric power to nearby communities. Water quality in the reservoirs is closely monitored, with the main constituents being dissolved oxygen, pH, and temperature. The climate in the watershed is moderated by the nearby Pacific Ocean, with mild temperatures and wet winters being the norm. In recent years, the area has seen an increase in extreme weather events, including heavy rainfall and flooding, which has led to concerns about the resilience of the watershed's infrastructure and communities.