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Man-made lake in Kentucky, United States From Wikipedia, the free encyclopedia
Lake Cumberland is a reservoir in Clinton, Russell, Wayne, Pulaski and Laurel counties in Kentucky.[1] The primary reasons for its construction were a means for flood control and the production of hydroelectric power. Its shoreline measures 1,255 miles (2,020 km) and the lake covers 65,530 acres (265 km2) at the maximum power pool elevation. The reservoir ranks 9th in the U.S. in volume, with a capacity of 6,100,000 acre-feet (7.5 km3) of water, enough to cover the entire Commonwealth of Kentucky with 3 inches (76 mm) of water. The main lake is 101 miles (163 km) long and over one mile (1.6 km) across at its widest point.
| Lake Cumberland | |
|---|---|
 Lake Cumberland as viewed at Wolf Creek Dam | |
  Lake Cumberland  Lake Cumberland | |
| Location | Clinton, Pulaski, Russell, Wayne, Laurel counties in Kentucky |
| Coordinates | 36°53′20″N 85°3′0″W |
| Primary inflows | Cumberland River |
| Primary outflows | Cumberland River |
| Basin countries | United States |
| Surface area | 102.4 sq mi (265.2 km2) (area at full pool) |
| Average depth | 90 feet (27.4 m) |
| Max. depth | 197 feet (60 m) |
| Water volume | Maximum: 6,089,000 acre⋅ft (7.511 km3) |
| Surface elevation | 722 feet (220 m) |
The lake has become a major source of tourism and an economic engine for Southern Kentucky. As of September 2011 Lake Cumberland was approximately 43 feet (13 m) below its normal level due to leakage in the earthen part of the dam, but repairs were completed in 2009 and officials estimated that lake levels would be back to normal by 2014–2015. As of April 18, 2015, the lake is back to full summer pool.
Lake Cumberland was impounded from the Cumberland River by the United States Army Corps of Engineers' construction of the Wolf Creek Dam, beginning in 1939 and ending with impoundment in 1952 after a delay caused by World War II.[1] Wolf Creek Dam is the 25th largest dam in the United States, and cost $15 million to construct originally, with an additional $65 million needed almost immediately to fix problems which soon became apparent. It is estimated that the dam has prevented more than $500 million in flood damage since its construction.
In 1967 a leak was found at the Wolf Creek Dam. Repairs were made in the late 1970s at a cost of over $96 million.
On January 22, 2007, the United States Army Corps of Engineers began lowering the water level in Lake Cumberland, fearing a possible breach in Wolf Creek Dam. Water seepage had again eroded the limestone under the dam, creating the potential for a breach and subsequent flood that would cause damages into the billions of dollars in cities downstream.[2]
By September 2011 Lake Cumberland was approximately 43 feet (13 m) below its normal level. The drop in water level had a negative impact on the area's tourism industry as marinas and municipalities scrambled to adjust their facilities for the lower water level.[3] The caverns beneath the structure complicated plans for repairs, but a $594 million project to construct a new wall inside the dam was completed by early 2013.[3] Since spring 2014 Lake Cumberland water levels returned to normal operation and water levels.[4]
Wolf Creek Dam's six turbines are capable of supplying the needs of an average city (population of 375,000) via 270 megawatts of electricity. The power generating capacity is considered "dead" when the lake's water level is below 673 feet (205 m).
In 1999, approximately 4.75 million visitors added more than $152.4 million to the local economy. Of the 383 lakes controlled or maintained by the U.S. Army Corps of Engineers, Lake Cumberland ranks 4th in the nation for the number of visitor hours. Over 1,500 houseboats float on Lake Cumberland and numerous power boats play in its waters.
Lake Cumberland is home to two Kentucky state parks: Lake Cumberland State Resort Park on its shore and General Burnside State Park on an island created by the lake at the confluence of the river and its Big South Fork, along with many other docks and marinas such as:[1]
Docks/Marinas:[5]
Several of Kentucky's record fish have been taken in the waters of Lake Cumberland,[6] including:
| January | 48 °F | 9 °C |
| February | 44 °F | 7 °C |
| March | 48 °F | 9 °C |
| April | 55 °F | 13 °C |
| May | 66 °F | 19 °C |
| June | 76 °F | 24 °C |
| July | 82 °F | 28 °C |
| August | 84 °F | 29 °C |
| September | 79 °F | 26 °C |
| October | 70 °F | 21 °C |
| November | 58 °F | 14 °C |
| December | 51 °F | 11 °C |
The lowest water level recorded (since construction) was 675.10 feet (205.77 m) above mean sea level on January 27, 1981. The highest water level recorded was 756.52 feet (230.6 m) above mean sea level at 5:00 AM, February 26, 2019.
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