Boulder City High School’s former varsity basketball coach pleaded not guilty Monday to new sexual misconduct charges , and a dispute may be brewing about whether he can have contact with his own children. Frank Mariani , 46, known as “Coach Bubba,” was indicted last week on counts of lewdness with a child under the age of 16, child abuse, neglect or endangerment and lewdness in the presence of a child or vulnerable person. Some of those charges are new, while others date back to his prior case in Boulder City Justice Court. The allegations stem from Boulder City accusers and newly disclosed victims from a separate school whose allegations date back nine years, according to prosecutors. State records show Mariani taught at Desert Pines High School from 2011 to 2023, when he moved to Boulder City High School. Mariani’s bail was set at $150,000 last week after he was indicted, but he appeared in court out of custody Monday wearing a blue suit. Defense attorney James Oronoz said Mariani had posted the bail.…