3.1% of families and 4.1% of the population were below the poverty line, including 4.3% of those under age 18 and 4.5% of those age 65 or over. Part of Montville is also treated by the U.S. Census Bureau as a census-designated place called Oxoboxo River. American Indians The Mohegan Native American Tribal Nation has been a presence in this area of Connecticut since the 16th century, and descended from indigenous cultures in the area for thousands of years. In the seventeenth century, the colony of Connecticut granted them a reservation, located north of the present-day village of Uncasville. Although the reservation is within the borders of the town of Montville, the tribe is federally recognized as a sovereign nation not subject to local or state laws. In addition to operating the Mohegan Sun, a casino resort that opened in 1996, the tribal nation also provides educational programs about their nation's heritage and history. Residents of Chinese descent Since at least the 1990s, people of Chinese descent have moved into the area drawn either by the work available at Mohegan Sun and the rising prices in the Northeast's Chinatowns. Their presence, the subject of an exhibition that travelled from the Lyman Allyn Museum in New London to New York City's Museum of Chinese in America, has sparked at least one racist incident. Education Public schools in Montville are overseen by Montville Public Schools, the town's public school system, operated by a board that includes nine elected members and two high school student representatives. The school system operates a regular high school, an alternative high school, a middle school, and three elementary schools. Montville High School serves grades 9 through 12. Enrollment is approximately 800 students. Economy Power plant NRG Energy Inc., based in La Jolla, California, operates an oil and natural gas-powered electricity generating plant in Montville, labeled by environmentalists as one of the "Sooty Six", the dirtiest power plants in the state. The plant was required to install pollution controls to comply with the state's 2002 power plant pollution law. In June 2006 the company proposed building a new type of coal-powered plant on the site for $1.6 billion. In return for building the plant, the company demanded that the state guarantee NRG long-term contracts for buying the electricity it generates and pick NRG's proposal over other plans for building new power plants in the state. At the time