 In 1951, Johannesson moved his Winnipeg operation to Rivercrest Airstrip and Seaplane Base at Middlechurch, north of Winnipeg.In 1952, after municipal and provincial judgments against Johannesson in the courts denying the approval for an airport at Rivercrest, he was successful in taking the case to the Supreme Court of Canada.At the conclusion of a three-year legal battle, the ruling from Johannesson v. the Municipality of West St. Paul established that federal jurisdiction applied to all matters pertaining to aviation.