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Fort Loudoun Dam | |
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Official name | Fort Loudoun Dam |
Location | Loudon County, Tennessee, United States |
Coordinates | 35°47′27.27″N84°14′33.54″W / 35.7909083°N 84.2426500°W |
Purpose | Navigation, flood control, electricity |
Construction began | July 8, 1940 |
Opening date | August 2, 1943 |
Operator(s) | Tennessee Valley Authority |
Dam and spillways | |
Impounds | Tennessee River |
Height | 122 ft (37 m) |
Length | 4,190 ft (1,280 m) |
Reservoir | |
Creates | Fort Loudoun Lake |
Power Station | |
Commission date | 1943-1948 |
Turbines | 1 x 36 MW, 2 x 34 MW, 1 x 40 MW propeller |
Installed capacity | 144 MW [1] |
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-mile (1,049 km) navigable river channel from Knoxville, Tennessee to Paducah, Kentucky. It is the uppermost of nine TVA dams on the Tennessee River. [2]
The dam impounds the 14,600-acre (5,900 ha) 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. It and associated infrastructure were listed on the National Register of Historic Places in 2017.
Fort Loudoun Dam is named after Fort Loudoun, an 18th-century British colonial fort built during the French and Indian War. The fort— which was located about 10 miles (16 km) south of the dam site— was named for John Campbell, 4th Earl of Loudoun, commander of British forces in North America during this period. [3]
Fort Loudoun Dam is located at just over 602 miles (969 km) upstream from the mouth of the Tennessee River and nearly 50 miles (80 km) downstream from the river's source at the confluence of the Holston and French Broad at Knoxville. The river's natural confluence with the Little Tennessee River is located approximately 1 mile (1.6 km) downstream, although the Tellico Reservoir, which covers most of the lower Little Tennessee, is connected to Fort Loudoun Lake via canal which empties into the lake upstream from the dam. Lenoir City is located immediately north of Fort Loudoun Dam. The reservoir includes parts of Loudon, Blount, and Knox counties.
Fort Loudoun Dam was built across three small islands (known as the "Belle Canton Islands"), [4] although the construction of the dam and the later construction of Tellico Dam required a drastic modification of the landscape. The northern and eastern parts of these islands are now submerged, whereas the southern and western parts were combined with part of the original mainland and part of Bussell Island (at the mouth of the Little Tennessee) to form one large island. This new island is separated from the mainland by the Tellico canal to the south and the main Tennessee River channel to the north.
From 1963 until the bridge's closure in July 2017, Lamar Alexander Parkway (part of U.S. Route 321) crossed the J. Carmichael Greer Bridge atop Fort Loudoun Dam and connected the area to Interstate 75 and Interstate 40 to the north and to Maryville and the Great Smoky Mountains National Park to the south. US-321 intersects U.S. Route 11 just over a mile north of the dam in Lenoir City. Interstate 140 and several federal and state highways cross Fort Loudoun Lake further upstream. A new bridge south-east of the dam was completed in the summer of 2017 and now carries Parkway traffic across the river.
Fort Loudoun Dam is 122 feet (37 m) high and stretches 4,190 feet (1,280 m) across the Tennessee River. The reservoir has 379 miles (610 km) of shoreline, 14,600 acres (5,900 ha) of water surface, and a flood storage capacity of 111,000 acre-feet (137,000,000 m3). The dam is equipped with a 60-by-360-foot (18 by 110 m) lock that raises and lowers boats about 70 feet (21 m) between Fort Loudoun Lake (upstream) and Watts Bar Lake (downstream). There are four hydroelectric generators at the dam with a combined generation capacity of 155.6 megawatts of electricity. [3]
To augment Fort Loudoun's power production capacity, water from the Little Tennessee River is diverted into Fort Loudoun Lake via a short canal extending from Tellico Reservoir a short distance upstream of the nearby Tellico Dam. The canal is roughly a half-mile long and effectively creates an island with Fort Loudoun Dam at its northeastern tip and Tellico Dam at its southwestern tip. The canal also allows navigation by barge-size craft between the Tellico Reservoir and Fort Loudoun Lake. [3]
In the mid-1930s, TVA drafted its "unified plan," a series of long-term goals that called for the construction of a series of dams along the Tennessee River to provide a minimum 9-foot (2.7 m) navigation channel along the entire length of the river, control flooding in the Tennessee Valley, and bring electricity to the area. The Fort Loudoun project was initially known as the Coulter Shoals project, named for a site identified by the U.S. Army Corps of Engineers 6 miles (9.7 km) upstream from the present dam site in the early 1930s. After surveying the area, TVA moved the project to the Belle Canton Islands.
The TVA proposed the project in 1939 and it was authorized on April 18, 1940. Construction began on July 8, 1940, using much of the construction organization that had been used in previous months on TVA's Hiwassee River projects. TVA originally planned to complete the dam in 1944, but the outbreak of World War II brought increased funding and urgency, and the dam was completed and the gates closed August 2, 1943. The first generator went online November 9, 1943 and the second went online January 15, 1944. [4]
The Fort Loudoun Dam project required the purchase of 16,200 acres (6,600 ha) of land and flowage rights. 317 residents, 6 cemeteries, and over 60 miles (97 km) of roads had to be relocated. Construction efforts required 582,000 cubic yards of concrete and 122,000 cubic yards of riprap. Plans originally called for the installation of four 24-megawatt units, but was modified to three 32-megawatt units after the construction of Cherokee Dam alleviated the need for flexibility. The dam's lock was designed by the Army Corps of Engineers and completed in June 1943. The reservoir submerged part of Louisville, Tennessee, and required modifications to Knoxville's riverfront. [4]
In 1942, TVA received approval to build a dam— at the time known as the "Fort Loudoun extension"— across the mouth of the Little Tennessee River, and divert the water via canal into the Fort Loudoun Reservoir. With the new dam extension planned, TVA received authorization for a fourth 32,000-kW generator. However, the War Production Board gave the dam's third and fourth generators a "low priority" rating, which effectively killed funding for the Fort Loudoun extension, and the side project was abandoned. [4] In the 1960s, the Fort Loudoun extension was revived as the Tellico Dam project.
The Little Tennessee River is a 135-mile (217 km) tributary of the Tennessee River that flows through the Blue Ridge Mountains from Georgia, into North Carolina, and then into Tennessee, in the southeastern United States. It drains portions of three national forests— Chattahoochee, Nantahala, and Cherokee— and provides the southwestern boundary of the Great Smoky Mountains National Park.
Norris Dam is a hydroelectric and flood control structure located on the Clinch River in Anderson County and Campbell County, Tennessee, United States. The dam was the first major project for the Tennessee Valley Authority, which had been created in 1933 to bring economic development to the region and control the rampant flooding that had long plagued the Tennessee Valley. The dam was named in honor of Nebraska Senator George Norris (1861–1944), a longtime supporter of government-owned utilities in general, and supporter of TVA in particular. The infrastructure project was listed on the National Register of Historic Places in 2016.
Tellico Dam is a concrete gravity and earthen embankment dam on the Little Tennessee River that was built by the Tennessee Valley Authority (TVA) in Loudon County, Tennessee. Planning for a dam structure on the Little Tennessee was reported as early as 1936 but was deferred for development until 1942. Completed in 1979, the dam created the Tellico Reservoir and is the last dam to be built by the Tennessee Valley Authority.
Watts Bar Dam is a hydroelectric dam on the Tennessee River in Meigs and Rhea counties in Tennessee, United States. The dam is one of nine dams on the main Tennessee River channel operated by the Tennessee Valley Authority, which built the dam in the early 1940s to provide flood control and electricity and to help create a continuous navigable channel along the entire length of the river. The dam is the technical boundary between the 39,090-acre (15,820 ha) Watts Bar Lake— which it impounds— and Chickamauga Lake, which stretches from the dam's tailwaters southward to Chattanooga.
Melton Hill Dam is a hydroelectric dam on the Clinch River just south of Oak Ridge, Tennessee, United States. The dam is operated by the Tennessee Valley Authority, which built the dam in the early 1960s to extend the Tennessee Valley's continuous navigation channel up the Clinch as far as Clinton and to increase TVA's overall power-generating capacity. The dam impounds the 5,470-acre (2,210 ha) Melton Hill Lake, and is the only TVA tributary dam serviced by a navigation lock. The dam and associated infrastructure were listed on the National Register of Historic Places in 2017.
Fort Loudoun Lake is a reservoir in east Tennessee on the upper Tennessee River, extending about 50 miles (80 km) along the river upstream from Fort Loudoun Dam, at Lenoir City, to Knoxville.
Nickajack Dam is a hydroelectric dam in Marion County in the U.S. state of Tennessee. It is one of nine dams on the Tennessee River owned and operated by the Tennessee Valley Authority, which built the dam in the mid-1960s to replace the outdated Hales Bar Dam 6 miles (9.7 km) upstream. The dam impounds the 10,370-acre (4,200 ha) Nickajack Lake and feeds into Guntersville Lake. Nickajack Dam is named for a Cherokee village once located just upstream from the dam. The village was the namesake for Nickajack Cave, which was partially flooded by the reservoir.
The Chickamauga Dam is a hydroelectric dam on the Tennessee River in Chattanooga, Tennessee, United States. The dam is owned and operated by the Tennessee Valley Authority, which built the dam in the late 1930s as part of a New Deal era initiative to improve navigation and bring flood control and economic development to the Tennessee Valley. The dam impounds the 36,240-acre (14,670 ha) Chickamauga Lake and feeds into Nickajack Lake. The dam and associated infrastructure were listed on the National Register of Historic Places in 2017.
Kentucky Dam is a hydroelectric dam on the Tennessee River on the county line between Livingston and Marshall counties in the U.S. state of Kentucky. The dam is the lowermost of nine dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the late 1930s and early 1940s to improve navigation on the lower part of the river and reduce flooding on the lower Ohio and Mississippi rivers. It was a major project initiated during the New Deal of President Franklin D. Roosevelt's administration, to invest in infrastructure to benefit the country. The dam impounds the Kentucky Lake of 160,000 acres (65,000 ha), which is the largest of TVA's reservoirs and the largest artificial lake by area in the Eastern United States. It was designated as an National Historic Civil Engineering Landmark by the American Society of Civil Engineers in 1996 and listed on the National Register of Historic Places in 2017.
Watauga Dam is a hydroelectric and flood control dam on the Watauga River in Carter County, in the U.S. state of Tennessee. It is owned and operated by the Tennessee Valley Authority, which built the dam in the 1940s as part of efforts to control flooding in the Tennessee River watershed. At 318 feet (97 m), Watauga is the second-highest dam in the TVA river and reservoir system, and at the time of its completion was one of the highest earth-and-rock dams in the United States. The dam impounds the TVA Watauga Reservoir of 6,430 acres (2,600 ha), and its tailwaters feed into Wilbur Lake.
Cherokee Dam is a hydroelectric dam located on the Holston River in Grainger County and Jefferson County, Tennessee, in the southeastern United States. The dam is operated and maintained by the Tennessee Valley Authority, which built the dam in the early 1940s to help meet urgent demands for energy at the outbreak of World War II. Cherokee Dam is 175 feet (53 m) high and impounds the 28,780-acre (11,650 ha) Cherokee Lake. It has a generating capacity of 136 megawatts. The dam was named for the Cherokee, a Native American tribe that controlled much of East Tennessee when the first European settlers arrived in the mid-18th century.
Ocoee Dam Number 1 is a hydroelectric dam on the Ocoee River in Polk County in the U.S. state of Tennessee. The dam impounds the 1,930-acre (780 ha) Parksville Reservoir and is the farthest downstream of four dams on the Toccoa/Ocoee River owned and operated by the Tennessee Valley Authority. Completed in 1911, Ocoee No. 1 was one of the first hydroelectric projects in Tennessee.
Blue Ridge Dam is a hydroelectric dam on the Toccoa River in Fannin County, in the U.S. state of Georgia. It is the uppermost of four dams on the Toccoa/Ocoee River owned and operated by the Tennessee Valley Authority. The dam impounds the 3,300-acre (1,300 ha) Blue Ridge Lake on the southwestern fringe of the Blue Ridge Mountains.
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 4,180 acres (16.9 km2). 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 7,000-acre (2,800 ha) 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. At the time it was built, Chatuge Dam was the highest earthen dam in the world until the Aswan Dam was built in Egypt in 1964. The dam and associated infrastructure was listed on the National Register of Historic Places in 2017.
South Holston Dam is a hydroelectric and flood control dam on the South Fork Holston River in Sullivan County, in the U.S. state of Tennessee. It is the uppermost of three dams on the South Fork Holston owned and operated by the Tennessee Valley Authority, which built the dam in the 1940s as part of efforts to control flooding in the Tennessee River watershed. On October 21, 1950 the valve gate closed and water began backing up to create South Holston Reservoir. Work began on the dam in December 1941, but in November 1942, the War Production Board requested that the operation be suspended because of a shortage of critical materials. Work did not resume until July 1, 1947. The dam now impounds the South Holston Lake of 7,550 acres (3,060 ha), which extends northeastward across the Tennessee-Virginia state line.
Boone Dam is a hydroelectric and flood control dam on the South Fork Holston River on the border between Sullivan County and Washington County in the U.S. state of Tennessee. It is one of three dams on the South Fork Holston owned and operated by the Tennessee Valley Authority, which built the dam in the early 1950s as part of greater efforts to control flooding in the Tennessee River watershed. The dam impounds the 4,500-acre (1,800 ha) Boone Lake, and its tailwaters are part of Fort Patrick Henry Lake. The dam and associated infrastructure were listed on the National Register of Historic Places in 2017.
Fort Patrick Henry Dam is a hydroelectric dam on the South Fork Holston River within the city of Kingsport, in Sullivan County in the U.S. state of Tennessee. It is the lowermost of three dams on the South Fork Holston owned and operated by the Tennessee Valley Authority, which built the dam in the early 1950s to take advantage of the hydroelectric potential created by the regulation of river flow with the completion of Watauga Dam, South Holston Dam, and Boone Dam further upstream in preceding years. The dam impounds the 872-acre (353 ha) Fort Patrick Henry Lake. While originally built for hydroelectric generation, the dam now plays an important role in the regulation of water flow and water temperature for the John Sevier Fossil Plant and other industrial plants downstream. The dam and associated infrastructure were listed on the National Register of Historic Places in 2017.
Bussell Island, formerly Lenoir Island, is an island located at the mouth of the Little Tennessee River, at its confluence with the Tennessee River in Loudon County, near the U.S. city of Lenoir City, Tennessee. The island was inhabited by various Native American cultures for thousands of years before the arrival of early European explorers. The Tellico Dam and a recreational area occupy part of the island. Part of the island was added in 1978 to the National Register of Historic Places for its archaeological potential.