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1 <br /> 2 <br /> 3 (D) Tree nrnc-e-yGtien protection measures. <br /> 4 <br /> 5 <br /> 6 <br /> 7 entrances. <br /> 8 (1) Before any construction or grading takes place, snow fencing (polyethylene laminate safety <br /> 9 netting) or erosion control fencing shall be placed at the dripline of significant trees <br /> 10 to be preserved. <br /> 11 <br /> 12 <br /> 13 <br /> 14 <br /> 15 <br /> 16 " <br /> 17 C-411%-4 must aEce in;1 IX:I'' M:1rci1ge tree hrntnr-tion rr-.6 1%nt11n%cj1%.1 . <br /> 18 (2) No construction shall begin until this work has been completed, inspected, and accepted by <br /> 19 the city.—The tree protection measures shall not be removed until the land disturbance and <br /> 20 construction activities are complete. <br /> 21 (3) Silt barriers or similarly effective erosion control barriers shall be required in any area where <br /> 22 erosion or siltation may cause damage to protected trees. <br /> 23 , <br /> 24 <br /> 25 <br /> 26 <br /> 27 , <br /> 28 . <br /> 29 <br /> 30 <br /> 31 (4) Wherein authorized excavations it becomes necessary to expose or cut roots more than one <br /> 32 inch in diameter, it shall be the duty of the contractor to protect such root under advice from <br /> 33 the city. <br /> 34 (5) All open trenching is prohibited. Utility installation within the dripline of protected trees, <br /> 35 during construction or thereafter, can only occur using trenchless methods. <br /> 36 (6) The mowing,clearing,and grubbing of brush located within or under the dripline of protected <br /> 37 trees may be allowed, provided such mowing, clearing, or grubbing is accomplished by hand <br /> 38 or by mowers. The use of heavy equipment for this purpose shall not be allowed. <br /> 39 (E) Removal threshold. <br /> 40 (1) Within residential developments, no more than A�60 percent of the inches of existing <br /> 41 significant tree DBH shall be F`tained en site <br /> removed. <br /> 42 (2) Within business and employment developments, no more than 30-70 percent of the <br /> 43 inches of existing significant tree DBH shall be T`tained on site removed. <br /> 44 (3) Significant trees removed for water quality treatment ponds, public trails and sidewalks, and <br /> 45 arterial and collector streets as defined herein, or that are considered invasive species, are <br /> 46 considered exempt from the removal threshold calculation. <br /> 47 (F) Reforestation/restitution requirement. If a development exceeds the removal threshold specified <br /> 48 in (E) above, the developer shall either reforest areas within the site, pay restitution, or some <br /> 49 combination thereof. <br /> Page 48 of 160 <br />