Lake Cumberland is a reservoir in Clinton, Pulaski, Russell, Wayne, and Laurel, counties in Kentucky. 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 at the maximum power pool elevation. The reservoir ranks 9th in the U.S. in size, with a capacity of of water, enough to cover the entire Commonwealth of Kentucky with 3 inches (76 mm) of water. The main lake is long and over one mile (1.6 km) across at its widest point. The lake has become a major source of tourism and an economic engine for south-central Kentucky. As of September 2011 Lake Cumberland was approximately below its normal level due to leakage in the earthen part of the dam, but repairs were completed in 2013 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. History Lake Cumberland was impounded from the Cumberland River by the United States Army Corps of Engineers' construction of the Wolf Creek Dam in 1952. 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. Dam repairs 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 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. By September 2011 Lake Cumberland was approximately 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. 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 and tourism officials were anticipating higher visitation