 In a 1989 study which examined repeat photography and stream flow analysis, Dinwoody Glacier was determined to have retreated rapidly between 1958 and 1983, though most of the reduction has been in the thickness of the glacier rather than its surface area.In the same 25-year period, the glacier lost an average of in thickness.Radar mapping of 72 locations on the glacier resulted in an average thickness of and a maximum measured depth of .