Complex sentence: Castaic Lake is the southern terminus of the west branch of the California Water Project, and a 1,175-megawatt pumped-storage hydroelectric plant at the north end of Lake Castaic captures the energy from the falling water descending toward the Los Angeles area.
Split into simpler sentences: Castaic Lake is the southern terminus of the west branch of the California Water Project. A 1,175-megawatt pumped-storage hydroelectric plant at the north end of Lake Castaic captures the energy from the falling water descending toward the Los Angeles area.