LK Sweetwater Reservoir is a man-made lake located in Sweetwater, Texas. The reservoir was created in 1973 by damming the Colorado River. The lake is the primary surface water source for the city of Sweetwater and the surrounding area. The hydrology of the reservoir is important for the local agriculture industry, as well as for recreational activities such as fishing and boating. The lake is also used for snowpack and surface water flow management. The primary providers of surface water to the reservoir are the Colorado River Municipal Water District and the West Central Texas Municipal Water District. The lake is a popular destination for fishing and boating, and is surrounded by parks and recreational areas. Additionally, the lake serves as a critical water source for agricultural irrigation in the region.