Goat Rock Lake is a 940-acre reservoir on the Chattahoochee River, which lies directly south of Bartlett's Ferry Dam and north of Lake Oliver. The lake is created by the Goat Rock Dam and Generating Plant. The name of the dam and lake date to the construction of the dam in 1912. Reportedly, construction workers saw goats jumping onto rocks in th…Goat Rock Lake is a 940-acre reservoir on the Chattahoochee River, which lies directly south of Bartlett's Ferry Dam and north of Lake Oliver. The lake is created by the Goat Rock Dam and Generating Plant. The name of the dam and lake date to the construction of the dam in 1912. Reportedly, construction workers saw goats jumping onto rocks in the river.