Last week, the seven Colorado River basin states — Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming — sent a letter to Congress calling for federal legislation to authorize the Drought Contingency Plan (DCP). Congressional House and Senate committees are holding hearings on the plan. It’s a historic moment for a river that supports two countries, seven states, 40 million people, 5.5 million acres of agricultural land, 22 federally recognized tribes, 11 national parks, seven wildlife refuges, four national recreation areas, and seven endangered species.