Section 1585.10  Definitions

        "Commercial Timber"  - means species of trees of a size which will be purchased by an available primary forest products market, such as for sawlogs, pulpwood, veneer, cooperage or forest products, which at the minimum will produce one stick of wood with a 4 inch diameter inside the bark at the small end and 8 feet long or greater.

        "Department" – means the Illinois Department of Natural Resources.

        "Diameter at Breast Height" (DBH) – means the stem diameter, outside bark, at a point 4.5 feet above ground.

        "Doyle Log Rule" – is:

        where:     D is diameter of the small end of a log in inches

              L is the log length in feet

              BF is Board Feet.