First Grandson Of Carl and Kay Halvorson of Lake Oswego Oregon Owners of Jensen Island (Halvorson Island) For 37 Years. I Was Lucky to Get 21 years of Island Living .My Grandfather Carl was a Well known Man When He Was Alive. He was 50th Oregon Construction President,Contractor Army Core Engineers John Day Dam,Creator of Mt Park 700 acres Of Condos and Homes for Lake Oswego,Woops power President,Blue Cross President and Portland Oregon s First Citizen 1983. To Name A Few of His Achievements. A Real Vision ary.