The Biden administration has updated the roadmap for solar development to 22 million acres of federal lands in the US West.

The Bureau of Land Management (BLM) and the Department of Energy’s National Renewable Energy Laboratory have determined that 700,000 acres of federal lands will be needed for solar farms over the next 20 years, so BLM recommended 22 million acres to give “maximum flexibility” to help the US reach its net zero by 2035 power sector goal.

The plan is an update of the Bureau of Land Management’s 2012 Western Solar Plan, which originally identified areas for solar development in six states – Arizona, California, Colorado, Nevada, New Mexico, and Utah.

The updated roadmap refines the analysis in the original six states and expands to five more states – Idaho, Montana, Oregon, Washington, and Wyoming. It also focuses on lands within 10 miles of existing or planned transmission lines and moves away from lands with sensitive resources.