Leaders of the Navajo Nation are worried that a coal-fired power plant on the New Mexico portion of the reservation might close. 

The Four Corners Generating Station provides revenues for the tribe and jobs for tribal members.  But its future is threatened by a proposal in Arizona to open electric markets to competition, according to Navajo leaders. 

A deal involving Arizona Public Service would keep the facility up and running.  But the company has put it on hold due to the competition proceedings, The Arizona Daily Star reported.