Federal agencies working to address uranium contamination on the Navajo Nation met most of the objectives outlined in a five-year plan.
But a report released this week by the U.S. Government Accountability Office showed the agencies fell short in two out of the eight objectives.
The GAO said the work schedules for the Northeast Church Rock mine near Gallup, New Mexico, and the Tuba City Dump were optimistic and ambitious.
The U.S. Environmental Protection Agency and the U.S. Bureau of Indian Affairs said more time was needed for outreach work and assessment. The agencies say they remain committed to cleaning up the sites but that tens of millions of dollars in federal funds is needed.
A second five-year plan is in the works.