In December 2015, the Guadalupe-Blanco River Authority and The Aransas Project began a search for common ground. The two organizations had spent years in litigation over the use of water in the Guadalupe River concerning how that use affects the wintering population of the endangered whooping crane (Grus americana). On February 24, 2016, the two former antagonists announced collaboration on a process to address human and environmental issues for the benefit of the Guadalupe River system, including San Antonio Bay and the Guadalupe Estuary, and to obtain funding for studies and projects for this effort. On November 29, 2016, the original agreement was revised substantially and the effort is now forging ahead.