Willamette River Greenway Code Amendments <br />Attachment A <br />The minimum tree preservation requirement and maximum mitigation allowance of EC <br />9.6885(2) may be adjusted if one of the conditions listed in subparagraph (a) below applies and <br />the proposed design complies with the criteria in subparagraphs (b) +"F^ (e): <br />(a) Conditions. To qualify for an adjustment, one of the following conditions must apply: <br />1. Strict compliance with tree preservation and removal standards is not feasible due to <br />other requirements of this code or existing site constraints such as topography or other <br />natural features; or, <br />2. An adjustment to the minimum tree preservation and/or mitigation requirement is <br />necessary in order to achieve a net density greater than 75 percent of the maximum net <br />density for the applicable zone alley.se I , ^d-^r+hiS I„"d , ed or, <br />3. The existing trees required to meet the minimum preservation requirement are <br />unlikely to survive the level and type of anticipated development due to susceptibility to <br />windthrow or other natural causes of failure. <br />(b) Criteria. To qualify for an adjustment, the proposed design must meet the following <br />criteria: <br />1. The proposed reduction min the minimum tree preservation requirement or increase <br />in mitigation allowance is necessary to accommodate a reasonable level of <br />development. <br />In no case shall the minimum tree preservation requirement be reduced below 30% <br />for areas at or above 900 feet elevation and areas within the Willamette River <br />Greenway Tree Preservation Zone 1, as depicted on Figure 9.6 <br />tc+ Except for areas at or above 900 feet elevation <br />within the Willamette <br />River Greenway Tree Preservation Zone 1 as depicted on Figure 9.6885(2)(e), <br />proposals may mitigate up to 100% of the minimum tree preservation requirement if <br />the following requirements are met: <br />A-1. For proposed subdivisions, new trees must be planted so that lots up to <br />7,000 square feet in area will contain a minimum of two trees and lots 7,000 <br />square feet or more will contain a minimum of three trees. <br />B-2. For all other developments, the proposed design must provide one tree per <br />dwelling unit. <br />-New tFees planted to Meet subseetie-n 1- A-1, 2. abeve aFe subject te the requirements at <br />EC 9.6885(2)(2d)2.e. lnst.allatie-n and- Maintenance. Trees planted te meet appliGable <br />develelame-M Site that -;;Pp- undeff -9 OPr--hP-1-; Dia.m.eter BFeast Height (d.b.h.) and listed <br />Tabl., d G44Cl71/.,iJ1~ nppreyed Speeies List m be designated fer p ,atien and <br />4. For areas at or above 900 feet elevation, and areas within the Willamette River <br />Greenway Tree Preservation Zone 1 as depicted on Figure 9.6885(2)(e), mitigation is <br />limited to 10% of the minimum preservation requirement. <br />5. For areas within the Willamette River Greenway Tree Preservation Zone 2 as depicted <br />on Figure 9.6885(2)(e), mitigation is limited to 20% of the minimum preservation <br />requirement. <br />6. New trees planted to meet mitigation requirements are subject to the requirements <br />shown as changes to Tree Preservation and Removal Standards included in the C&O Amendments. Purple text <br />represents code that is included the C&O Amendments; red text shows changes made for the purposes of the <br />Willamette River Greenway Code Amendments. <br />Draft: December 1, 2022 <br />Page 19 of 25 <br />Page 25 of 39 <br />