Job alert: The Shafter-Wasco Irrigation District, which serves nearly 30,000 acres of farms in Kern County, is hiring a new general manager. But what exactly does the general manager of an irrigation district do? It’s a question that isn’t easily answered, even by water executives themselves…. [Dale] Brogan managed the Delano-Earlimart Irrigation District in Tulare and Kern counties for 28 years. He’s helping to fill the role at Shafter-Wasco until someone is hired on permanently.