They said stream adjudication isn't a necessary response to the lawsuit filed by the tribes, which Fallin claimed in a letter she sent last week to Anoatubby and Pyle. Fallin called upon the tribes to drop their lawsuit.
Stream adjudication is the process of determining the water rights of an entire river system.
In December, the Oklahoma Water Resources Board gave its attorneys authority to sue in order to begin adjudicating the Kiamichi River, Muddy Boggy stream and Clear Boggy stream systems — the waterways at the heart of the dispute.
The federal lawsuit filed by the Chickasaw and Choctaw nations claims the water rights in question are provided to them in treaties signed in the 1800s. The tribes also say the state would be violating federal law by adjudicating the waterways in southeastern Oklahoma.