BIDDEFORD — The head beer-maker at Dirigo Brewing Co. is happy with how his newest release turned out, but equally pleased with the cause it will support. Dirigo recently partnered with the local firefighters union on a new beer, Big Water, a Kolsch style ale, with the understanding that the proceeds of all sales will benefit nearly three dozen people displaced by a fire in April. “It’s been a great experience for us,” brewer Ray Edgar said.