Specifications include, but are not limited to: 4. 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. 5. Mechanized Equipment All use of mechanical equipment must be approved by NLRED before use. Mechanized equipment operators shall adhere to the same clearance requirements described in Section 6 below, to the greatest extent possible. Stubs created using mechanized equipment shall not exceed 18” in length. Trimming with mechanical tree saws (such as, Jarraf) shall be performed to a height equal to a full boom extension or twenty feet (20’) above conductor whichever is greater. 6. Clearance Requirements Vegetation within the Clearing Area shall be cut and removed as follows: a) Overhanging limbs that are within twenty feet (20’) of a primary conductor shall be removed. Overhanging limbs that are more than twenty feet (20’) above all primary conductors will be left undisturbed except that dead, broken, or diseased limbs overhanging a conductor shall be removed, regardless of height. b) All vegetative growth capable of competing for conductor space will be removed, regardless of height. This includes: i) All vegetative growth that causes binding or endangers cables, guys, or similar lines or facilities attached to poles shall be removed; and ii) All vegetative growth within a three foot (3’) radius shall be cleared around poles with primary lines, secondary lines and poles that lack vehicular access. Vegetation will be cut at ground level and treated with approved herbicide. iii) Vines attached to poles shall be cut approximately eighteen inches (18”) above the ground, then cut approximately three feet (3’) higher leaving a ready visible cleared area. The remaining stump of the vine and the base of the structure shall be treated with an approved herbicide. The vines, however, shall not be removed from poles, guy wires, pole braces, and similar attachments. c) For removal of all vegetative growth NOT capable of competing for conductor space, mowing and/or manual cutting is the preferred method of removal. In some areas, NLRED may require the Contractor to apply herbicide after mowing and/or manual cutting. In these situations, NLRED will consult with the Contractor before ground clearing begins. In some areas, NLRED might permit just the use of herbicide for ground clearing. In these situations, the Contractor must notify and get approval from NLRED before ground clearing begins.
