TITLE 17: CONSERVATION
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AUTHORITY: Implementing and authorized by the Wrongful Tree Cutting Act [740 ILCS 185].
SOURCE: Adopted at 21 Ill. Reg. 11747, effective August 12, 1997.
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:
( |
(D-4)2 |
)L=BF |
4 |
where: D is diameter of the small end of a log in inches
L is the log length in feet
BF is Board Feet.
Section 1585.20 Volume and Value Determination
a) Volume. The Doyle Log Rule will be used to determine board foot volume.
b) Value.
1) No value will be assigned to any tree that will not meet the definition of commercial timber. This Part does not apply to replacement, aesthetic, shade-tree or landscaping value.
2) The unit value will be based on the appraiser's knowledge of commercial timber market values based on comparable sales or sawmill purchases of commercial timber. The estimated value will be the dollar amount of the commercial timber had it been offered for sale on the open market. The "Illinois Timber Price" report issued by the Illinois Department of Agriculture and the Illinois Department of Natural Resources can be used to determine commercial timber value.