GROTON, Conn. (AP) â¿¿ A union that represents workers at Electric Boat says it has been told by the submarine builder to expect between 450 and 500 layoffs over the next few months. Electric Boat had been expecting to play a major role in the repair of the fire-damaged USS Miami, which the Navy said this month it was instead going to scrap because of budget cuts and growing costs. Ken DelaCruz is president of the Metal Trades Council at the Groton shipyard. He said Friday most of the layoffs were already planned before the loss of the Miami was announced, but the repair could have kept 300 workers employed. There was a spike in employment earlier this year at the shipyard where jobs rise and fall with the demands of the Navy.