1947 Birthday John Howard, U.S., speed record, 152.284 mph at Bonneville Flats, UT 1939 Event John Cobb (Britain) drives 365.85 MPH (593.48 KPH) at Bonneville Flats 1937 Event Franklin D. Roosevelt dedicates Bonneville Dam on Columbia River (Oregon) 1937 Event Bonneville Dam on Columbia River begins producing power 1843 Birthday Grove Karl Gilbert, geologist, investigated Lake Bonneville, Utah
