Grayson is a home rule-class city in and the county seat of Carter County, Kentucky, United States, in the state's northeastern region.
 The population was 4,217 at the 2010 census.
 Along with Carter County, the city is closely associated with the nearby Huntington-Ashland, WV-KY-OH Metropolitan Statistical Area being just 9 miles west of the M.S.A's western boundary.
 The city has grown in size substantially since the opening of Interstate 64 in 1975 through Carter County.
 Immediately afterwards, Grayson experienced several years of commercial sector growth to serve the Interstate 64 traffic.
 Since 1990, the city has also seen significant growth in the residential sector with the Interstate making for a faster trip to and from Ashland.
 Beginning in 1995, AA Highway terminates in Grayson making the city a gateway to the Huntington-Ashland urban area.
Lake Cumberland is a reservoir in Clinton, Laurel, McCreary, Pulaski, Russell, and Wayne 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 65,530 acre at the maximum power pool elevation.
 The reservoir ranks 9th in the U.S. in size, with a capacity of 6100000 acre.ft of water, enough to cover the entire Commonwealth of Kentucky with 3 inches (76 mm) of water.
 The main lake is 101 mi long and over one mile (1.6 km) across at its widest point.
Richmond is a home rule-class city in and the county seat of Madison County, Kentucky, United States.
 It is named after Richmond, Virginia, and is the home of Eastern Kentucky University.
 The population was 33,533 in 2015.
 Richmond is the third-largest city in the Bluegrass region (after Louisville and Lexington) and the state's sixth-largest city.
 Richmond serves as the center for work and shopping for south-central Kentucky.
 Richmond is the principal city of the Richmond–Berea Micropolitan Statistical Area, which includes all of Madison and Rockcastle counties.
Lake Nasser (Arabic: بحيرة ناصر‎ ‎ "Boħēret Nāṣer ", ] ) is a vast reservoir in southern Egypt and northern Sudan.
 It is one of the largest man-made lakes in the world.
 Before construction, Sudan was against the building of Lake Nasser because it would encroach on land in the North, where the Nubian people lived.
 They would have to be resettled.
 In the end Sudan's land near the area of Lake Nasser was mostly flooded by the lake.
Russell is a home rule-class city on the south bank of the Ohio River in Greenup County, Kentucky, United States.
 The population was 3,380 as of the 2010 census, down from 3,645 in 2000.
 Russell is a suburb of Ashland and part of the Huntington-Ashland-Ironton metropolitan area.
 It has close economic affiliations with its neighbors, Ashland and Flatwoods in Kentucky and Ironton, Ohio.
Russell Springs is a home rule-class city in Russell County, Kentucky, in the United States.
 The city is the gateway to Lake Cumberland, one of the largest man-made lakes in the region, created by Wolf Creek Dam.
 It is the largest city in the county, having a population of 2,399 during the year 2000 U.S. Census.
Creelsboro is a ghost town in Russell County, Kentucky, United States.
 The historic town was thriving some sixteen years before Russell County was formed.
 It was named for Elijah Creel, an early settler, and was at one time the busiest river port on the Cumberland River between Nashville, Tennessee, and Burnside, Kentucky.
 The town hosted a bank, school, three stores and a building that provided lodging for steam boat passengers.
 Creelsboro was a major trade center along the Cumberland River in the 19th century, although its actual population was only about 50.
 With the construction of the Wolf Creek Dam, traffic from steamboats and other vessels greatly decreased.
 Creelsboro's current population primarily are involved in agriculture.
 Many tourists visit the area to access the Cumberland River for trout fishing and other recreational boating activities.
Jamestown is a home rule-class city in Russell County, Kentucky, in the United States.
 It is the seat of its county.
 The population was 1,624 at the 2000 U.S. census.
London is a home rule-class city in Laurel County, Kentucky, in the United States.
 It is the seat of its county.
 The population was 7,993 at the time of the 2010 U.S. census.
 London, Kentucky, is the second-largest city named London in the United States and the fourth-largest in the world.
 It is part of the London, Kentucky micropolitan area.
 Of the seventeen micropolitan areas in Kentucky, London is the largest; the London micropolitan area's 2010 Census population was 126,369.
 London is also home to the annual World Chicken Festival that celebrates the life of Colonel Sanders and features the world's largest skillet.
Seale is an unincorporated community in Russell County, Alabama, United States.
 It was the county seat from 1868 until 1935, and is currently home to Russell County High School and middle school.
 The former Russell County courthouse, built in 1868, is located in the town.

Question: Russell Springs is a home rule-class city in Russell County, Kentucky, in the United States, the city is the gateway to which one of the largest man-made lakes in the region, a reservoir in Kentucky?
Answer: Lake Cumberland