. . . . . . . "Washington Water Power Company" . . . . . . . . "Washington Water Power" . . "Washington Water Power" . . "Avista" . . . . . . . . . "Avista Corp." . "Avista" . . . . "Avista Corp" . "1889" . "Ecova" . "1982" . . "1.473E9" . . . "Avista Energy" . . . . . . . . . . "1899" . . . . "Avista Corporation" . "Avista Utilities" .