The Navajo Nation’s Department of Justice announced Jan. 13 it has settled with mining companies to resolve claims stemming from a 2015 spill that resulted in rivers in three western states being fouled with a bright-yellow plume of arsenic, lead and other heavy metals.The Navajo Nation’s Department of Justice announced Jan. 13 it has settled with mining companies to resolve claims stemming from a 2015 spill that resulted in rivers in three western states being fouled with a bright-yellow plume of arsenic, lead and other heavy metals.