Boone Dam

Last updated
Boone Dam
Boone Dam.jpg
Official nameBoone Dam
Location Sullivan County and Washington County, Tennessee, United States
Coordinates 36°26′24″N82°26′16″W / 36.44000°N 82.43778°W / 36.44000; -82.43778
Construction beganAugust 29, 1950
Opening dateDecember 16, 1952
Operator(s) Tennessee Valley Authority
Dam and spillways
Impounds South Fork Holston River
Height160 feet (49 m)
Length1,532 feet (467 m)
Reservoir
Creates Boone Lake

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. [1] The dam and associated infrastructure were listed on the National Register of Historic Places in 2017.

Contents

Boone Dam is named for frontiersman Daniel Boone (1734-1820), who was active in the general area in the 1760s. [2]

Location

Boone Dam is located 19 miles (31 km) above the South Fork Holston River's confluence with the North Fork Holston River (which forms the Holston River proper). The Watauga River joins the South Fork Holston almost immediately upstream from the dam, creating a V-shaped reservoir that extends for 17 miles (27 km) up the South Fork Holston (all the way to Bluff City) and for 15 miles (24 km) up the Watauga. The Sullivan-Washington county line follows the reservoir for most of its Watauga span. Boone Dam is 31 miles (50 km) downstream from South Holston Dam and 10 miles (16 km) upstream from Fort Patrick Henry Dam.

Capacity

Boone Dam is a concrete gravity-type dam 160 feet (49 m) high and 1,532 feet (467 m) long, and has a generating capacity of 81,000 kilowatts. [2] While the main section of the dam is a concrete structure, the northern half of the dam consists of a 750-foot (230 m) earth-and-fill structure that seals off the floodplain adjacent to the main river channel. [1] The dam's overfall spillway has five radial gates with a combined maximum discharge of 137,000 cubic feet per second ([ convert: unknown unit ]). [1] [3] Boone Lake has 168 miles (270 km) of shoreline and a flood storage capacity of 75,829 acre-feet (93,534,000 m3). The reservoir's operating levels vary by about 20 feet (6.1 m) in a typical year. [2]

Background and construction

Water exiting one of Boone Dam's sluice gates Boone-dam-tva2.jpg
Water exiting one of Boone Dam's sluice gates

Both public and private entities were aware of the hydroelectric potential of the South Fork Holston River in the early 1900s, although other than Wilbur Dam (completed in 1912) on the river's Watauga River tributary, no major dam projects were attempted. In the 1920s, the Holston River Power Company surveyed the river basin with plans to build four dams, and identified the present Boone site (the company called it the "Bachman Ford" site). In the 1930s, when the Tennessee Valley Authority assumed oversight of flood control operations in the Tennessee River watershed, the agency suggested the Boone site (the agency originally called it the "Spurgeon Island" site) as a potential dam site. As Watauga Dam and South Holston Dam (further upstream) neared completion in the late 1940s, the Spurgeon Island site was the next logical step in development of the South Fork Holston. The project's primary purpose was to provide flood control in the region, especially for Kingsport (a few miles downstream), which had suffered major flood damage in 1901 and 1940. The dam would also add hydroelectricity to TVA's energy grid, which by 1950 had been maxed out by increasing demands from consumers and from Atomic Energy Commission facilities at Oak Ridge. Work on Boone Dam began August 29, 1950. [1]

The construction of Boone Dam and its reservoir required the purchase of 5,160 acres (2,090 ha) of land, 1,363 acres (552 ha) of which had to be cleared. 152 families, 104 graves, and 18 miles (29 km) of roads had to be relocated, and three new bridges were built. The outbreak of the Korean War brought increased support from federal entities, and work progressed without interruption. [1]

Boone Dam was completed and its gates closed December 16, 1952. The dam's first generator went online March 16, 1953, its second generator went online June 12, 1953, and the third went online September 3, 1953. [1] The total cost of the Boone project was $27.7 million. [3]

Sinkhole

On October 20, 2014, during an informal inspection, a sinkhole was discovered at the toe of the dam that allowed water to seep through. Consequently, a decision was made to start lowering the water level in the lake earlier than normal as a cautionary measure. [4]

In July 2015, a formal inspection of the dam revealed that Internal erosion was the cause of the seepage. A wide range of methods of repairing the dam were considered. [5] It was estimated the repair would cost two hundred to three hundred million dollars. [6] A composite seepage barrier was the preferred option. After impact studies were conducted, work began on the dam in 2016, and construction was performed and completed in 3 stages. Boone Dam was reopened on May 25, 2022. [7]

Related Research Articles

<span class="mw-page-title-main">Elizabethton, Tennessee</span> City in Tennessee, United States

Elizabethton is a city in, and the county seat of Carter County, Tennessee, United States. Elizabethton is the historical site of the first independent American government located west of both the Eastern Continental Divide and the original Thirteen Colonies.

<span class="mw-page-title-main">Holston River</span> River in Tennessee, United States

The Holston River is a 136-mile (219 km) river that flows from Kingsport, Tennessee, to Knoxville, Tennessee. Along with its three major forks, it comprises a major river system that drains much of northeastern Tennessee, southwestern Virginia, and northwestern North Carolina. The Holston's confluence with the French Broad River at Knoxville marks the beginning of the Tennessee River.

<span class="mw-page-title-main">Watauga River</span> River in the United States of America

The Watauga River is a large stream of western North Carolina and East Tennessee. It is 78.5 miles (126.3 km) long with its headwaters in Linville Gap to the South Fork Holston River at Boone Lake.

<span class="mw-page-title-main">Watts Bar Dam</span> Dam in Tennessee, United States

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.

<span class="mw-page-title-main">Fort Loudoun Dam</span> Dam in Tennessee, United States

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.

<span class="mw-page-title-main">Guntersville Dam</span> Dam in Alabama, United States

Guntersville Dam is a hydroelectric dam on the Tennessee River in Marshall County, in the U.S. state of Alabama. It is one of nine dams on the river 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 create a continuous navigation channel on the entire length of the river and bring flood control and economic development to the region. The dam impounds the Guntersville Lake of 67,900 acres (27,500 ha), and its tailwaters feed into Wheeler Lake.

<span class="mw-page-title-main">Nickajack Dam</span> Dam in Tennessee, United States

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.

<span class="mw-page-title-main">Chickamauga Dam</span> Dam in Tennessee, United States

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.

Boone Lake is a reservoir in Sullivan and Washington counties in northeastern Tennessee, formed by the impoundment of the South Fork Holston River and Watauga River behind Boone Dam.

<span class="mw-page-title-main">Nolichucky Dam</span> Dam in Tennessee, United States

Nolichucky Dam is a dam on the Nolichucky River near Greeneville, Tennessee, maintained by the Tennessee Valley Authority (TVA). The dam is located just over 46 miles (74 km) upstream from the mouth of the Nolichucky, and impounds Davy Crockett Lake, which extends 6 miles (9.7 km) upstream from the dam.

<span class="mw-page-title-main">Cherokee Lake</span> Artificial reservoir in East Tennessee, United States

Cherokee Lake, also known as Cherokee Reservoir, is an artificial reservoir in the U.S. state of Tennessee formed by the impoundment of the Holston River behind Cherokee Dam.

<span class="mw-page-title-main">Watauga Dam</span> Dam in Tennessee, United States

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.

<span class="mw-page-title-main">Cherokee Dam</span> Dam in Tennessee, United States

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.

<span class="mw-page-title-main">Hiwassee Dam</span> Dam in North Carolina, United States

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 6,000 acres (2,400 ha), and its tailwaters are part of Apalachia Lake. At 307 feet (94 m), Hiwassee Dam is the highest overspill dam in the Eastern United States and third only to Shasta and Grand Coulee dams in the nation. At the time it was completed, it was the highest overspill dam in the world.

<span class="mw-page-title-main">Nottely Dam</span> Dam in Georgia, United States

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.

<span class="mw-page-title-main">Chatuge Dam</span> Dam in North Carolina, United States

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.

<span class="mw-page-title-main">South Holston Dam</span> Dam in Tennessee, United States

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.

<span class="mw-page-title-main">Wilbur Dam</span> Dam in Tennessee, United States

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 miles (4.8 km) up the Watauga to the base of Watauga Dam. Wilbur Dam was completed in 1912 making it the second oldest dam in the TVA system behind Ocoee Dam No. 1. Wilbur Dam was one of the first major hydroelectric projects in Tennessee, and remains one of the oldest dams in the TVA system.

<span class="mw-page-title-main">Fort Patrick Henry Dam</span> Dam in Tennessee, United States

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.

References

  1. 1 2 3 4 5 6 Tennessee Valley Authority, The Upper Holston Projects: Watauga, South Holston, Boone, and Fort Patrick Henry; a Comprehensive Report on the Planning, Design, Construction, Initial Operations, and Costs of Four Hydro Projects in the Holston Basin at the Eastern Tip of Tennessee, Technical Report No. 14 (Washington, D.C.: U.S. Government Printing Office, 1958), pp. 1-6, 12, 18-23, 31, 37, 61-65, 236, 548.
  2. 1 2 3 Tennessee Valley Authority, Boone Reservoir Archived January 5, 2009, at the Wayback Machine . Retrieved: 3 February 2009.
  3. 1 2 Tennessee Valley Authority, The Nickajack Project: A Report on the Planning, Design, Construction, Initial Operations, and Costs, Technical Report No. 16 (Knoxville, Tenn.: Tennessee Valley Authority, 1972), pp. 10-11.
  4. "TVA lowering Boone Lake level early as part sinkhole investigation". WCYB News 5. Sullivan County, Tennessee. October 30, 2014. Retrieved November 20, 2014.
  5. Boone Dam Investigation and Analysis Summary," Tennessee Valley Authority website, 30 June 2015.
  6. J.H. Osborne, "Repairs to Boone Dam To Take Years, Cost Up To $300 Million," Kingsport (TN) Times-News, 31 July 2015.
  7. "Boone Dam Project". Tennessee Valley Authority.