The increasing demand for power is prompting challenges from a number of tribes who say the means to transmit that power is harming culturally significant tribal land. The Tohono O’odham, Hopi, Zuni, and San Carlos Apache tribes were dealt a legal setback by the U.S. Supreme Court earlier this year in their opposition to a proposed $10 billion transmission line through a pristine Arizona canyon. And pueblos and other tribes say they are concerned about additional transmission capacity planned to boost power at the Los Alamos National Laboratory in New Mexico. In both cases, tribal officials say the proposals did not adequately take cultural and archaeological significance into consideration.