Question: Hiwassee Dam is the third highest dam in the TVA system, behind the hydroelectric dam in what two North Carolina counties as the highest?
Context: Black Eagle Dam is a hydroelectric gravity weir dam located on the Missouri River in the city of Great Falls, Montana.  The first dam on the site, built and opened in 1890, was a timber-and-rock crib dam.  This structure was the first hydroelectric dam built in Montana and the first built on the Missouri River.  The dam helped give the city of Great Falls the nickname "The Electric City."  A second dam, built of concrete in 1926 and opened in 1927, replaced the first dam, which was not removed and lies submerged in the reservoir.  Almost unchanged since 1926, the dam is 782 ft long and 34.5 ft high, and its powerhouse contains three turbines capable of generating seven megawatts (MW) of power each.  The maximum power output of the dam is 18 MW.  Montana Power Company built the second dam, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014.  The reservoir behind the dam has no official name, but was called the Long Pool for many years.  The reservoir is about 2 mi long, and has a storage capacity of 1,710 acre.ft to 1,820 acre.ft of water. Wilbur Dam is a hydroelectric dam on the Watauga River in Carter County, in the U.S. state of Tennessee.  It is one of two dams on the river owned and operated by the Tennessee Valley Authority.  The dam impounds Wilbur Lake, which extends for about 3 mi up the Watauga to the base of Watauga Dam.  Completed by 1912 the Ocoee Dam No. 1 is the only Hydroelectric dam that is older, Wilbur Dam was one of the first major hydroelectric projects in Tennessee, and remains one of the oldest dams in the TVA system. Fort Loudoun Dam is a hydroelectric dam on the Tennessee River in Loudon County, Tennessee, in the southeastern United States.  The dam is operated by the Tennessee Valley Authority (TVA), which built the dam in the early 1940s as part of a unified plan to provide electricity and flood control in the Tennessee Valley and create a continuous 652 mi navigable river channel from Knoxville, Tennessee to Paducah, Kentucky.  It is the uppermost of nine TVA dams on the Tennessee River.  The dam impounds the 14600 acre Fort Loudoun Lake and its tailwaters are part of Watts Bar Lake.  The generating capacity of Fort Loudoun Dam is enhanced by the Tellico Reservoir, from which water is diverted via canal to Fort Loudoun Lake. The Jigüey Dam is an arch-gravity dam on the Nizao River about 32 km east of San Cristóbal in San Cristóbal Province of the Dominican Republic.  At 110.5 m tall, it is the third highest dam in the country.  The purpose of the dam is to produce hydroelectric power and it supplies the largest hydroelectric power station in the country.  The dam diverts water through over 4.4 km of headrace pipe and penstock to the power station downstream.  The power station contains two 49 MW Francis turbine-generators for an installed capacity of 98 MW.  The dam was completed and its power station was commissioned 1992.  It cost US$500 million to build and funding was provided by the host government. Hiwassee Dam is a hydroelectric dam on the Hiwassee River in Cherokee County, in the U.S. state of North Carolina.  It is one of three dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the late 1930s to bring flood control and electricity to the region.  The dam impounds the Hiwassee Lake of 6000 acre , and its tailwaters are part of Apalachia Lake.  At 307 ft , Hiwassee Dam is the third highest dam in the TVA system, behind only Fontana and Watauga. Apalachia Dam is a hydroelectric dam on the Hiwassee River in Cherokee County, in the U.S. state of North Carolina.  The dam is the lowermost of three dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the early 1940s to provide emergency power for aluminum production during World War II.  While the dam is in North Carolina, an 8.3 mi underground conduit carries water from the dam's reservoir to the powerhouse located 12 mi downstream across the state line in Polk County, Tennessee. Fontana Dam is a hydroelectric dam on the Little Tennessee River in Swain and Graham counties, North Carolina, United States.  The dam is operated by the Tennessee Valley Authority, which built the dam in the early 1940s to accommodate the skyrocketing electricity demands in the Tennessee Valley at the height of World War II.  At 480 ft high, Fontana is the tallest dam in the Eastern United States, and at the time of its construction, it was the fourth tallest dam in the world. The Campos Novos Dam (also known as Barragem de Campos Novos locally) is a hydroelectric dam in the Santa Catarina state in southern Brazil.  In 2006, at 200 m dam height, it was regarded as the third highest dam of this type (concrete-faced rock fill dam or CFRD) in the world, but, in June 2006, the water which it held back ran out following a break in the dam wall. Nottely Dam is a hydroelectric and flood storage dam on the Nottely River in Union County, in the U.S. state of Georgia.  The dam is owned and operated by the Tennessee Valley Authority, which built the dam in the early 1940s as a flood control structure and to help regulate flow at nearby Hiwassee Dam.  The dam impounds the Lake Nottely of 4180 acre .  While the dam was built primarily for flood storage, a generator was installed at Nottely in the 1950s, giving it a small hydroelectric output. Chatuge Dam is a flood control and hydroelectric dam on the Hiwassee River in Clay County, in the U.S. state of North Carolina.  The dam is the uppermost of three dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the early 1940s for flood storage and to provide flow regulation at Hiwassee Dam further downstream.  The dam impounds the 7000 acre Chatuge Lake, which straddles the North Carolina-Georgia state line.  While originally built solely for flood storage, a generator installed at Chatuge in the 1950s gives the dam a small hydroelectric output.
Answer: Swain and Graham