The Energy Department has named a new acting administration for the Bonneville Power Administration.

The department informed BPA employees by email Monday that acting Deputy Administrator Elliot Mainzer was named to replace Bill Drummond. Drummond  has led the agency since January after long-time administrator Steve Wright retired.

The Oregonian reports the agency provided no reason for the move.

The BPA sells power from 31 hydroelectric dams and a nuclear plant, and it operates the high voltage transmission system in the Northwest.