Specifications include, but are not limited to: Clearing Methods. Tree Trimming and pruning shall be performed in accordance with modern arboricultural standards. Drop-crotching, directional trimming and "Collar" cuts will always be utilized to minimize stubbing, round-overs and flat top trimming practices. Mechanized Equipment. Mechanized equipment operators shall adhere to the same clearance requirements described in section (1) above, to the greatest extent possible. Stubs created using mechanized equipment shall not exceed 18" in length (unless approved by Vegetation Manager). Trimming with mechanical tree saws (such as, Jarraf) shall be performed to a height equal to a full boom extension or 20 feet above conductor, whichever is greater. Mechanical tree saws shall not be used on developed properties. Clearance Tree Removal Herbicides