Exhibit 99.1 "Strong results at Avista Utilities reflect solid execution of our business plan in the first quarter," said Avista President and CEO Heather Rosentrater. "Wildfire risk mitigation activities also advanced significantly in April, as bills passed in both Washington and Idaho providing for approval of wildfire mitigation plans, and, in Washington, providing the opportunity to securitize costs associated with disasters such as wildfire. These bills represent an important step forward in addressing ...