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01 ! <br /> Exempt Allowable Allowable Prohibited <br /> with <br /> Mitigation <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 buffe?l X <br /> • Perpendicular crossings that disturb greater than 40 <br /> linear feet of riparian buffera a <br /> Provided that,in Zone 1,all of the following BMPs for underground utility lines are used. If all of these <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 a one-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 /> • In wetlands,mats shall be utilized to minimize soil disturbance. <br /> ll <br />