This study looks at the costs of helicopter logging, as reflected by production levels, in eight different basal area retentions of an Old Growth Spruce-Hemlock forest of Southeast Alaska. Retention ranges of 0% (clearcut) to 75% were achieved using group selection, clump retention and individual tree marking across the eight different units. The objective was to quantify any statistical differences in production between these retentions. Production levels were measured by weight of each turn within a cycle and the time of each turn normalized for a common distance. Unpaired T-test analysis indicated a statistical significance relationship between the weight of a turn and turn time and the residual canopy. The inexperience of the ground crew was probably a factor in these results. The cost of the 75% retention was three times the cost of logging the clearcut.