Types of Graphs. 1  Types of Graphs: Bar Graphs. 2  Types of Graphs: Box and Whiskers (Boxplots) 3  Types of Graphs: Frequency Distributions.  Types of Graphs: 1  Histogram. Types of Graphs: Line Graphs.  Types of Graphs: Pie 1  Graphs. Types of Graphs: Scatter Graphs.  Types of Graphs: Stemplots.
The 1950s. By the end of the war, TVA had completed a 652-mile navigation channel the length of the Tennessee River, and had become the nationâs largest electricity supplier.
TVA's hydroelectric system consists of: 29 power-generating dams throughout the Tennessee River system, some of which date back to the TVAâs early days in the 1930s. A pumped-storage plant near Chattanooga called Raccoon Mountain. Purchased power from eight dams on the Cumberland River operated by the Army Corps of Engineers.