The Blackwater Watershed covers an area of approximately 1,269 square miles and is located in the northern part of West Virginia. It is a part of the Upper Ohio River Basin and its hydrology is characterized by steep slopes and rugged terrain. The watershed receives an average of 48 inches of precipitation per year, with much of it falling as snow in the winter months. The area is known for its heavy snowpack, with some locations receiving over 100 inches of snow each year. The surface water in the Blackwater Watershed is of high quality, with low levels of pollutants and a diverse aquatic ecosystem. There are several reservoirs in the watershed that are used for drinking water, recreation, and hydroelectric power generation. Interesting climatic facts include the area's high average snowfall and its susceptibility to flash flooding during heavy rainfall events. In recent years, the watershed has experienced increased rainfall intensity and frequency, leading to concerns about erosion and sedimentation in streams and rivers.