DENVER - When he was young, Javier Refuerzo and his little brother used to fish through holes in the floor of City Park's bandshell gazebo. And when his wriggling carp were too large to pull through the 3 to 4-inch openings, he'd cut them loose. "There were a few kids that were there most weekends," said the 42-year-old Denverite, who fished at City Park's 24-acre Ferril Lake in the mid-1990s.