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i <br /> Exempt Allowable Allowable Prlohibited <br /> with <br /> Mitigation <br /> Underground electric utility line perpendicular crossings of <br /> streams and other surface waters subject to this Rule:. <br /> • Perpendicular crossings that disturb less than or equal to X <br /> 40 linear feet of riparian buffer31 <br /> • Perpendicular crossings that disturb greater than 40 }{ <br /> linear feet of riparian buffer3 a <br /> Provided that,in Zone 1,all of the following BMPs for underground utility lines are used. If all of thesle <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 /> i <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 floe <br /> of stormwater through the buffer. <br /> • In wetlands,mats shall be utilized to minimize soil disturbance. <br /> I <br /> I <br /> III, <br /> �I <br /> II <br /> II <br /> i <br /> . III <br /> I <br /> II <br /> I <br /> �6 <br />