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1 <br />2 <br />3 <br />(D) Tree <br />nrec er-yGtien protection measures. <br />4 <br />tt) <br />5 <br />6 <br />7 <br />entrances. <br />8 <br />(1) <br />Before any construction or grading takes place, snow fencing (polyethylene laminate safety <br />9 <br />netting) or erosion control fencing shall be placed at the dripline of significant trees <br />10 <br />to be preserved. ' <br />11 <br />12 <br />13 <br />14 <br />15 <br />16 <br />" <br />17 <br />1%-4 must aEce in 1r,I, :I'' M:1rr.i1,n tree mr-pt�r-teo , rr- .6 1%n+4,r,�r <br />! �:411 %.1 %Aj. <br />18 <br />(2) <br />No construction shall begin until this work has been completed, inspected, and accepted by <br />19 <br />the city. —The tree protection measures shall not be removed until the land disturbance and <br />20 <br />construction activities are complete. <br />21 <br />(3) <br />Silt barriers or similarly effective erosion control barriers shall be required in any area where <br />22 <br />erosion or siltation may cause damage to protected trees. <br />23 <br />, <br />24 <br />25 <br />26 <br />27 <br />, <br />28 <br />. <br />29 <br />30 <br />31 <br />(4) <br />Wherein authorized excavations it becomes necessary to expose or cut roots more than one <br />32 <br />inch in diameter, it shall be the duty of the contractor to protect such root under advice from <br />33 <br />the city. <br />34 <br />(5) <br />All open trenching is prohibited. Utility installation within the dripline of protected trees, <br />35 <br />during construction or thereafter, can only occur using trenchless methods. <br />36 <br />(6) <br />The mowing, clearing, and grubbing of brush located within or under the dripline of protected <br />37 <br />trees may be allowed, provided such mowing, clearing, or grubbing is accomplished by hand <br />38 <br />or by mowers. The use of heavy equipment for this purpose shall not be allowed. <br />39 <br />(E) Removal threshold. <br />40 <br />(1) <br />Within residential developments, no more than A�60 percent of the inches of existing <br />41 <br />significant tree DBH shall be Fetai ed en site removed. <br />42 <br />(2) <br />Within business and employment developments, no more than 30-70 percent of the <br />43 <br />inches of existing significant tree DBH shall be Fetai ed on site removed. <br />44 <br />(3) <br />Significant trees removed for water quality treatment ponds, public trails and sidewalks, and <br />45 <br />arterial and collector streets as defined herein, or that are considered invasive species, are <br />46 <br />considered exempt from the removal threshold calculation. <br />47 <br />(F) Reforestation/restitution <br />requirement. If a development exceeds the removal threshold specified <br />48 <br />in (E) <br />above, the developer shall either reforest areas within the site, pay restitution, or some <br />49 <br />combination thereof. <br />Page 48 of 160 <br />