Investigators determined that the fire was accidental, saying it was caused by "an undetermined electrical source" near the front of a building that was destroyed. OCEAN CITY, N.J. - An amusement park on the New Jersey shore reopened Saturday almost two months after damage from a fire later ruled accidental.Brian Hartley, vice president of Playland’s Castaway Cove in Ocean City, confirmed Saturday that the park reopened as scheduled at noon.A side entrance is being used while a temporary deck is built in place of the structure at the entrance that caught fire.The Jan.