Question: The reservation used by descendants of the Nipmuck Indians contains a lake of what size?

Context paragraphs:
Elem Indian Colony: The Elem Indian Colony of Pomo Indians (also known as the Elem Band of Pomo and Sulfur Bank Band of Pomo Indians) are a Native American band of Pomo based on 50 acre near Clearlake Oaks, California on the Eastern shore of Clear Lake.  The Elem Indian Colony reservation was originally formed under the name Sulfur Bank Rancheria ( ) in 1949.  The reservation lies between Clearlake Oaks to its north, and Clearlake to its south.

Cattaraugus Reservation: Cattaraugus Reservation is an Indian reservation of the federally recognized Seneca Nation of Indians, formerly part of the Iroquois Confederacy located in New York.  As of the 2000 census, the Indian reservation had a total population of 2,412.  Its total area is about 34.4 mi² (89.1 km²).  The reservation stretches from Lake Erie inward along Cattaraugus Creek, along either side of NY 438.  It is divided among three counties for census purposes:

Red Lake Senior High School: Red Lake Senior High School is a public state-funded high school in unincorporated Red Lake, in Beltrami County, northern Minnesota, USA.  The high school is located on the Red Lake Indian Reservation on which members of the Red Lake Band of Chippewa (Ojibwe) Indians live, and has over 300 students.  The school's mascots are the "Ogichidaag" and "Ogichidaakwag" (warriors and lady warriors).  The school also hosts its own radio station, Ka-MOD (94.1 FM).  The school is a part of Red Lake School District (Independent School District #38).

Chaubunagungamaug Nipmuck: The Webster/Dudley Band of the Chaubunagungamaug Nipmuck Indians, also known as the Chaubunagungamaug, Chaubunagungamaug Nipmuck, Pegan or Dudley Indians, are a Native American tribe indigenous to the U.S. states of Massachusetts and Connecticut in the region of New England.  They are one of three tribes with state recognition in Massachusetts as a tribe of Nipmuck Indians, including the Hassanamisco Nipmuc and the Natick Massachusett, although the latter are mainly descended from the Massachusett people.

Broad Creek Memorial Scout Reservation: Broad Creek Memorial Scout Reservation, more commonly called just Broad Creek, is the sum of eight separate areas in the Chesapeake Bay Watershed.  The reservation is 3 mi from the Maryland and Pennsylvania border within Harford County, 25 mi from the Maryland and Delaware border, and 28 mi from Baltimore.  During the summer Camp Saffran focuses on older youth while Camp Spencer focuses on younger youth.  Camp Oest was focused on younger youth, but that operation moved to Camp Spencer in 2016.  Camp Oest is now used for large events, such as Woodbadge and NYLC.  During the off-season Camp Oest, Camp Saffran, and Camp Spencer are open for weekend tent and cabin camping.  Five other less developed areas of the reservation used for outpost camping and hiking are called Camp Cone, Camp Finney, The Pines, The Hemlocks, and OA Hill.  The facilities at the reservation are used by 36,000 youth each year, 17% of whom are not affiliated with the Boy Scouts of America.

Blackfeet Nation: The Blackfeet Nation also known as the Blackfeet Tribe of the Blackfeet Indian Reservation is an Indian reservation and headquarters for the Siksikaitsitapi people in the United States.  Located in Montana, its members are composed primarily of the Piegan Blackfeet ("Ampskapi Piikani") band of the larger ethnic group historically described as the Blackfoot Confederacy.  It is located east of Glacier National Park and borders the Canadian province of Alberta.  Cut Bank Creek and Birch Creek form part of its eastern and southern borders.  The reservation contains 3000 sqmi , twice the size of the national park and larger than the state of Delaware.  It is located in parts of Glacier and Pondera counties.

Chaubunagungamaug Reservation: The Chaubunagungamaug Reservation refers to the small parcel of land located in the town of Thompson, Connecticut, close to the border with the town of Webster, Massachusetts and within the bounds of Lake Chaubunagungamaug (Webster Lake) to the east and the French River to the west.  The reservation is used by the descendants of the Nipmuck Indians of the previous reservation, c. 1682-1869, that existed in the same area, who now identify as the Webster/Dudley Band of the Chaubunagungamaug Nipmuck.  Together with the Hassanamisco Nipmuc, both have received state recognition under the Massachusetts Commission on Indian Affairs.

Owasippe Scout Reservation: Owasippe Scout Reservation (OSR), located in Twin Lake, Michigan is the resident camp operated by the Pathway to Adventure Council (formerly Chicago Area Council) of Boy Scouts of America.  It began in 1911 as Camp White on 40 acre of land on Crystal Lake donated by the White Lake Chamber of Commerce.  It is the United States' oldest and longest continuously operating Boy Scout camp.  At its peak of use the reservation covered 11,000 acres (45 km²) and served over 10,000 Scouts per summer, but the overall decline in Scouting nationwide has seen yearly attendance fall to approximately 3,800 campers.  Previous property consolidations has left the camp at 4,800 acres (19 km²) in size, and the council was attempting to sell the camp but met with stiff resistance from the local community, Scouts, leaders, families, and staff alumni.  The deal with the developer was terminated on November 7, 2008.  Owasippe is also the oldest Scout camp in America.

Lake Chaubunagungamaug: Lake Chaubunagungamaug, also known as Webster Lake, is a lake in the town of Webster, Massachusetts, United States.  It is located near the Connecticut border and has a surface area of 1442 acres.  Since 1921, the lake has also been known by a much longer name having 45 letters comprising fourteen syllables: Lake Char­gogg­a­gogg­man­chaugg­a­gogg­chau­bun­a­gung­a­maugg.

Mashapaug Lake: Mashapaug Lake is a 297 acre lake surrounded by Bigelow Hollow State Park and Nipmuck State Forest in the town of Union in northeastern Connecticut.  The lake has a maximum depth of 39.5 feet (12.0 meters), and an average depth of 15 feet (4.6 meters).  Its normal surface elevation is 706 feet.  The lake is very popular with fishermen and boaters from the area, and can also be used for swimming.

Supporting paragraphs: Chaubunagungamaug Reservation Lake Chaubunagungamaug
Answer: 1442 acres