Tacoma Power, a division of TPU, provides residents of Tacoma and several bordering municipalities with electrical power generated by eight hydroelectric dams on the Skokomish River and elsewhere. Environmentalists, fishermen, and the Skokomish Indian Tribe have criticized TPU's operation of Cushman Dam on the North Fork of the Skokomish River; the tribe's $6 billion claim was denied by the U.S. Supreme court in January 2006. The capacity of Tacoma's hydroelectric system as of 2004 was 713,000 kilowatts, or about 50% of the demand made up by TPU's customers (the rest is purchased from other utilities). According to TPU, hydroelectricity provides about 87% of Tacoma's power; coal 3%; natural gas 1%; nuclear 9%; and biomass and wind at less than 1%. Tacoma Power also operates the Click! Network, a municipally owned cable television and internet service. The residential cost per kilowatt hour of electricity is just over 6 cents.