By BEN EVANS, Associated Press Writer
"Regrettably, it will necessarily be a solution being directed to the states instead of our much hoped for solution coming from the states," he wrote in the letter, released Saturday.
But he said the negotiators could not reach a comprehensive agreement and called it "unfortunate" that the states are moving forward with ongoing litigation.
"It is our hope that developments in the courts will not frustrate further progress in resolving the remaining technical issues we face together," he said.
Georgia is fighting to hold back more water in federal reservoirs around Atlanta to serve its growing population.