Question: The Conklingville Dam holds back what lake with a surface area of about 41.7 squmi at capacity?

full_context: Document 1: Lake Sebago: At 310 acre , Lake Sebago is the largest lake in Harriman State Park in the U.S. state of New York. The name is Algonquian for "big water". Operated by the Palisades Interstate Park Commission, Lake Sebago is surrounded by picnic lawns and play fields, and is popular with anglers fishing for landlocked salmon, lake trout, bass, perch and sunfish. The lake has a swimming beach, hand boat launch (electric motors only) and cabin camping. Lake Sebago lies near Sloatsburg. It is located just south of Lake Kanawauke and is accessible by auto from Seven Lakes Drive.
Document 2: Lake Luzerne-Hadley, New York: Lake Luzerne-Hadley was a census-designated place (CDP) in Saratoga and Warren counties in the U.S. state of New York. The portion in Warren County is part of the Glens Falls Metropolitan Statistical Area. The CDP consisted of the centers of population in the towns of Hadley (Saratoga County) and Lake Luzerne (Warren County).
Document 3: Conklingville Dam: The Conklingville Dam, in Hadley, Saratoga County, New York, is an earthen dam which holds back the Great Sacandaga Lake (in the town of Day, New York).
Document 4: Upper St. Regis Lake: 742 acre Upper St. Regis Lake is a part of the St. Regis River in the Adirondacks in northern New York State. Along with Lower St. Regis Lake and Spitfire Lake, it became famous in the late 19th century as a summer playground of America's power elite, drawn to the area by its scenic beauty and by the rustic charms of Paul Smith's Hotel. It is the site of many grand old summer "cottages" and Great Camps, including Marjorie Merriweather Post's Topridge. Frederick W. Vanderbilt, Anson Phelps Stokes and Whitelaw Reid were among the summer residents. "The camps of many of these families began as tent colonies, with separate units for sleeping, dining, games, and so on, and evolved into permanent structures built with understated taste."
Document 5: Stewart's Dam: Stewart’s Dam, in Hadley, New York, on the Sacandaga River, holds back the Stewart Bridge Reservoir, one of the largest reservoirs in America to be contained by an earthen dam. Farther upstream is the Conklingville Dam which creates the Great Sacandaga Lake.
Document 6: Schuylerville, New York: Schuylerville is a village in Saratoga County, New York, United States. The population was 1,386 at the 2010 census. The village is named after the Schuyler family. Schuylerville was the site of the Battles of Saratoga (1777) and contains several historic buildings including General Schuyler House and Old Saratoga Reformed Church. The Saratoga Monument is located in nearby Victory, Saratoga County, New York. Schuylerville High School and a library are part of the village.
Document 7: Kingsley Dam: Kingsley Dam is located on the east side of Lake McConaughy in central Keith County, Nebraska, and is the second largest hydraulic fill dam in the world. It was built as part of the New Deal project. The dam is 162 ft tall, 3.1 mi long, and 1100 ft wide at its base. On the east side of the dam is Lake Ogallala and on the south side is the Kingsley Hydroelectricity Plant. The Nebraska Game and Parks Commission and Central Nebraska Public Power and Irrigation District are also located in this area. Kingsley Dam, the Kingsley Hydroelectricity Plant, the Morning Glory Spillway, and the Outlet Tower – a large structure near the dam used to release water from the lake – are main visual icons of Lake McConaughy.
Document 8: Kiwassa Lake: Kiwassa Lake, originally called Lonesome Pond, is a 280-acre lake in the north-central Adirondack Park, south of Dewey Mountain, between Lower Saranac Lake and Oseetah Lake, two miles southwest of the village of Saranac Lake, New York, United States. It drains into Lake Oseetah, and thence into the Saranac River. The westernmost shore line is owned by New York State.
Document 9: Conowingo Dam: The Conowingo Dam (also Conowingo Hydroelectric Plant, Conowingo Hydroelectric Station) is a large hydroelectric dam in the lower Susquehanna River near the town of Conowingo, Maryland. The medium-height, masonry gravity dam is one of the largest non-federal hydroelectric dams in the U.S.
Document 10: Great East Lake: Great East Lake is an 1825 acre water body located in Carroll County, New Hampshire, and York County, Maine, in the United States. The lake is shared by the towns of Wakefield, New Hampshire, and Acton, Maine, with 45% of its surface area in Acton and 55% in Wakefield. The lake is the farthest upstream of the five headwater lakes of the Salmon Falls River, a tributary of the Piscataqua River. Water from Great East Lake flows out its dam and through the 800 ft Newichawannock Canal into Horn Pond, then into the Salmon Falls River below Horn Pond.
Document 11: Great Sacandaga Lake: The Great Sacandaga Lake (formerly the Sacandaga Reservoir) is a large lake situated in the Adirondack Park in northern New York in the United States. The lake has a surface area of about 41.7 sqmi at capacity, and the length is about 29 mi . The word "Sacandaga" means "Land of the Waving Grass" in the local native language. The lake is located in the northern parts of Fulton County and Saratoga County near the south border of the Adirondack Park. A small part of it also extends northward into southern Hamilton County. The broader, south end of the lake is northeast of the City of Johnstown and the City of Gloversville.
Document 12: Safe Harbor Dam: The Safe Harbor Dam (also Safe Harbor Hydroelectric Station) is a concrete gravity dam on the lower Susquehanna River with an associated hydroelectric power station. It is the most northerly and last of three Great Depression-era public electrification projects' hydroelectric dams and was constructed between 1 April 1930 and 7 December 1931. It created a long and relatively shallow lake along the upper stretch of the Conejohela Valley known as Lake Clarke. The creation of the lake shrank the upper Conejohela Flats in size.
Document 13: Lake Moraine (New York): Lake Moraine (also known as Madison Reservoir) is a mesotrophic lake located 2.5 miles northeast of Hamilton, New York. The lake is 261 acres, consisting of two basins which are separated by a causeway and interconnected by a culvert. The northern basin is 79 acres and is relatively shallow with a maximum depth of 12.0 feet and average depth of 3.7 feet. The larger southern basin is 172 acres and has a maximum depth of 45 feet and an average depth of 17.7 feet. Payne Brook is the lake's outflow that flows into the Chenango River.
Document 14: Shasta Dam: Shasta Dam (called Kennett Dam before its construction) is a concrete arch-gravity dam across the Sacramento River in Northern California in the United States. At 602 ft high, it is the eighth-tallest dam in the United States. Located at the north end of the Sacramento Valley, Shasta Dam creates Shasta Lake for long-term water storage, flood control, hydroelectricity and protection against the intrusion of saline water. The largest reservoir in the state, Shasta Lake can hold about 4500000 acre-ft .
Document 15: Contra Dam: The Contra Dam, commonly known as the Verzasca Dam and the Locarno Dam, is an arch dam on the Verzasca River in the "Val Verzasca" of Ticino, Switzerland. The dam creates Lago di Vogorno 2 km upstream of Lake Maggiore and supports the 105 MW Verzasca Hydroelectric Power Station hydroelectric power station. It was constructed between 1961 and 1965 and starting shortly after its reservoir was filled, a series of earthquakes related to its water load occurred until 1971. The dam is owned and operated by Verzasca SA and is the fourth tallest in Switzerland.
ground_truth: Great Sacandaga Lake