Question: Russell Springs, Kentucky is the gateway to the reservoir that has a shoreline of what distance?

Context paragraphs:
Lake Cumberland: 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.

WJRS: WJRS (104.9 FM) is a radio station broadcasting a Country music format that is licensed to Jamestown, Kentucky, and serving the Jamestown/Russell Springs area in Russell County, Kentucky.  The station is currently owned by Lake Cumberland Broadcasters, LLC, which also owns WJKY.  The two stations share broadcast facilities and transmitting tower at 2804 South US 127 on the south side of Russell Springs.

WHVE: WHVE (92.7 FM) is a radio station broadcasting an Adult Contemporary format.  Licensed to Russell Springs, Kentucky, USA, the station is currently owned by Shoreline Communications, Inc.

WIDS (AM): WIDS (570 AM) is a radio station broadcasting a Gospel Music format.  Licensed to Russell Springs, Kentucky, USA.  The station is currently owned by Hammond Broadcasting, Inc.

Russell Springs, Kentucky: 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.

Kentucky Route 379: Kentucky Route 379 (KY 379) is a 27.483 mi state highway in Kentucky that runs from Kentucky Route 1880 in rural Cumberland County northwest of Albany to U.S. Route 127 in northeastern Russell Springs via Russell Springs.  KY 379 is split into two segments by the Cumberland River, with neither a ferry nor a bridge at the crossing.  The southern segment ends just west of a boat ramp on the river, while the northern segment begins at Kentucky Route 771 just east of the river.

Kentucky Route 430: Kentucky Route 430 (KY 430) is a 1.690 mi state highway in the U.S. state of Kentucky.  The highway travels through the central part of Russell Springs.

WJKY: WJKY (1060 AM) is a radio station broadcasting a Sports radio format.  It is licensed to Jamestown, Kentucky, USA, and serving the Russell County, Kentucky area, including Jamestown and Russell Springs.  The station is owned by Lake Cumberland Broadcasters and is affiliated with ESPN Radio.

Lake Martin: Lake Martin is located in Tallapoosa, Elmore and Coosa counties in Alabama.  It is a 44,000-acre (178 km²) reservoir with over 750 miles (1,200 km) of wooded shoreline.  Lake Martin is a reservoir, formed by the construction of Martin Dam on the Tallapoosa River.  The Martin Dam powerhouse is used to generate hydroelectric power for the Alabama Power Company.  Construction on Martin Dam began in 1923 and was completed in 1926, creating what was at that time the largest man-made body of water in the world.  Originally known as Cherokee Bluffs for the geological formation upon which it was built, the dam was renamed in 1936 in honor of Thomas Martin, the then-president of Alabama Power Company.  Alabama Power and Russell Lands own the majority of the shoreline.

Red Bluff Reservoir: Red Bluff Reservoir is a reservoir on the Pecos River 40 miles (64 km) north of Pecos, Texas.  The reservoir extends into Loving and Reeves Counties in Texas, and Eddy County in New Mexico.  The northern shoreline of the reservoir is the lowest point in the state of New Mexico.  The reservoir was formed in 1936 by the construction of a dam by the Red Bluff Water Control District to provide water for irrigation and hydroelectric power.  The reservoir is also used for recreational activities.

Supporting paragraphs: Russell Springs, Kentucky Lake Cumberland
Answer: 1,255 miles