Colorado River officials plan to expand a conservation program next year that pays farmers and ranchers to use less water. But questions remain about some of the proposed ideas and the program’s overall efficacy.

The state initially launched the System Conservation Pilot Program in 2015 as a part of a multistate effort to conserve water from the Colorado River, which provides water for millions of residents throughout seven states as well as Mexico. The effort was designed to see if conservation efforts could stabilize the water levels in critical reservoirs along the river, like Lake Powell.