On September 30, 2016, FERC accepted the change in status filing submitted by Puget Sound Energy, Inc. (“Puget”) and certain affiliated generators. The filing informed FERC of the companies’ intent to join the Energy Imbalance Market (“EIM”) administered by the California Independent System Operator Corporation (“CAISO”) beginning on October 1, 2016. As discussed in a previous WER article, in August 2016, FERC approved a similar filing and anticipated EIM start-date from Arizona Public Service Company (“APS”). With this order, Puget and APS become the fifth and sixth balancing authority areas to join the EIM, following PacifiCorp East and PacifiCorp West in 2014, and Nevada Power Company, Sierra Pacific Power in 2015. Idaho Power plans to become the seventh balancing authority area in 2018. (see April 13, 2016 edition of the WER).