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o~ <br /> Exempt Allowable Allowable <br />with <br />Mitigation Prohibited <br />Underground electric utility line perpendicular crossings of <br />streams and other surface waters subject to this Ordinance: <br />3 X <br />• Perpendicular crossings that disturb less than or equal to <br />40 linear feet of riparian buffer34 <br /> X <br />• Perpendicular crossings that disturb greater than 40 <br />linear feet of riparian buffer3 a <br />•~~•..~.. ~~,a~, ..~ ~.viio ~, ai, vi uic iuiiuwAn~ ~iv1r5 for unaergiouna uililry Imes are uses. lI alt OT triese <br />BMPs are not used, then the underground utility line shall require a no practical alternative evaluation by <br />the Division. <br />• Woody vegetation shall be cleared by hand. No land grubbing or grading is allowed. <br />• Vegetative root systems shall be left intact to maintain the integrity of the soil. Stumps shall remain, <br />except in the trench, where trees are cut. <br />• Underground cables shall be installed by vibratory plow or trenching. <br />• The trench shall be backfilled with the excavated soil material immediately following cable installation. <br />• No fertilizer shall be used other than aone-time application to re-establish vegetation. <br />• Construction activities shall minimize the removal of woody vegetation, the extent of the disturbed area, <br />and the time in which areas remain in a disturbed state. <br />• Active measures shall be taken after construction and during routine maintenance to ensure diffuse flow <br />of stormwater through the buffer. <br />• Tn wetlands, mats shall be utilized to minimize soil disturbance. <br />11 <br />