Question: In the 19th century, Rhea Springs was inundated when the completion of Watts Bar Dam by the Tennessee Valley Authority, a federally owned corporation in the United States created by congressional charter on May 18, 1933 to provide navigation, flood control, electricity generation, fertilizer manufacturing, and economic development to the Tennessee Valley, a region particularly affected by what historical event?
Sentence (from "Watts Bar Nuclear Generating Station"): It is located on a 1,770-acre (7.2 km²) site in Rhea County, Tennessee, near Spring City, between the cities of Chattanooga and Knoxville.
Relevant evidence: No