New exhibition shows how tribe dealt with blowout last August. Navajo artist Venaya Yazzie wrote the Diné expression – Tó éí ííná – beside a photograph of a friend sullenly looking out on the tainted San Juan River in the days after the Gold King Mine spill. It means “Water is Life,” and for the indigenous tribes affected by the mine blowout in August, the words sum up months of confusion, fear and sadness surrounding the health of critical southwest waterways. On Aug. 5, the Environmental Protection Agency breached the portal of the mine north of Silverton, sending an estimated...