San Diego County Water Authority General Manager Sandra L. Kerl retired Thursday after more than 40 years of public service, with Deputy General Manager Dan Denham taking over on an interim basis.

Kerl’s tenure at the water authority included 10 years as deputy general manager and four years as the agency’s top staff member during a period of unprecedented drought regionally and nationally.

“Sandy’s vision and management skills have been crucial in successfully navigating the challenges of an extreme drought while ensuring stability through the COVID-19 pandemic,” said Mel Katz, chair of the water authority’s board. “Her deep experience with water issues, collaborative management style, and can-do spirit guided the agency through an unprecedented period of change.”