<p>Dewight Francis Kramer Sr., former general manager of two scandal-plagued water districts, pleaded guilty Friday in Sacramento federal court to his role in a major tax fraud and agreed to cooperate with prosecutors pursuing other water district officials.</p>
<p>Kramer has no criminal history other than the federal charges. He admitted to the judge that, while general manager of Northridge Water District, he conspired with his assistant and co-defendant, Jerry Allan Ness, to conceal from the Internal Revenue Service $516,332 earned by them and other district employees from January 1999 through December 2002.</p>