92 Ill. Adm. Code 530.600
Tree Trimming
Section 530
Section 530.600 Tree
Trimming
a) The Department's policies for the preservation and
conservation of roadside trees, shrubs, and turf are based on the inherent
value of these environmental features to the public well-being and enjoyment.
b) Tree trimming for line clearance shall not be considered a
normal maintenance operation and each tree trimming project shall require the
application for and the issuance of a separate working permit.
c) Applications for tree trimming permits shall include assurance
that the work will be accomplished by competent workmen with supervision who
are experienced in accepted tree pruning practices.
d) Poor pruning practices resulting in damaged or misshapened
trees will not be tolerated and shall be grounds for cancellation of the tree
trimming permit and for assessment of damages.
e) The Department will require compensation for trees extensively
damaged and for trees removed without authorization. The formula developed by
the International Society of Arboriculture, incorporated by reference in
Section 530.20, will be used as a basis for determining the compensation for
damaged trees or unauthorized removal of trees.
f) The Department may require the removal of trees if trimming or
radical pruning would leave them in an unacceptable condition.
g) The Department may require that special measures be taken to
preserve specimen trees or trees of special significance. The required
measures may consist of higher poles, side arm extensions, covered wire or
other means.
h) Tree trimming permits shall designate an expiration date in
the interest of assuring that the work will be expeditiously accomplished.