A deal was supposed to be signed by the end of 2018, under threat that the water levels on the river would push the federal government to impose its own restrictions.
As extreme drought encroached on Colorado and much of the Southwest this year, many eyes turned to the weekly U.S. Drought Monitor map.
Colorado River water supports about 40 million people and millions of acres of farmland in the U.S. and Mexico.
Iola has been deep underwater since the reservoir was built and filled in the 1960s. Drought has brought it back to the surface, for now.
It's not a guarantee, but El Niño-produced rainfall would relieve parched conditions in many parts of the drought-stricken Southwest.
A new study from the National Center for Atmospheric Research in Boulder predicts more rainfall on fewer, concentrated days leading to more intense flooding.
Environmentalists are challenging a court ruling over whether water from the river is properly accounted for and being used in beneficial ways along the Middle Rio Grande Valley.
A United Nations report out this week said the world is due for "rapid and far-reaching" changes by 2030 because of global warming.
It's not over yet, too: The long-term effects of drought go on long after the dry weather ends, and the impact of the new USMCA is to be seen.