The Lower Clark Fork Watershed is located in western Montana and covers approximately 7,550 square miles. It is comprised of the Clark Fork River and its many tributaries, making it a vital source of hydroelectric power and irrigation for the region. The watershed experiences an annual snowpack that is crucial for maintaining water levels throughout the year. Surface water quality is impacted by mining operations and agricultural practices, leading to concerns about pollution and contamination. The area is also home to several large reservoirs, including Lake Pend Oreille, which provides fish and wildlife habitat, recreational opportunities, and drinking water to nearby communities. In recent years, the region has experienced warmer temperatures and earlier snowmelt, leading to changes in streamflow patterns and potential impacts on fish and wildlife populations.