1.10.23 PC Agenda - Laserfiche WebLink

Attachment B WG Code Amendments (CA 22-1) Code Figures Description December 22, 2022 The illustrative figure shows a hypothetical development scenario on the River Road corridor abutting the Willamette River that includes a 70 unit residential building, access drive, and surface parking lot on a rectangular site encompassing all three proposed Tree Preservation Zones and the Willamette River Greenway Setback Area. The figure demonstrates the steps needed to prepare a site plan that complies with EC 9.6885(2)(e)1.b., as illustrated by the keynotes (as numbered and highlighted on the attached figure), and briefly summarized below: • Step 1: Identify trees to be preserved in each zone (see keynote 1 - Yellow). o Zone 3. Three existing trees are proposed for preservation. The total DBH of preservation trees is 110", which is below minimum preservation requirement of 40% (120" DBH). The maximum mitigation is 100%. o Zone 2. Two existing trees are proposed for preservation. The total DBH of preservation trees is 80", which is below the minimum preservation requirement of 50% (100"). The maximum mitigation is 50%. o Zone 1. Six existing trees are proposed for preservation. The total DBH of preservation trees is 80", which exceeds the minimum preservation requirement of 50% (50" DBH). No mitigation is allowed • Step 2: Identify trees to be removed in each zone (see keynote 2 - Light Orange). o Zone 3. Nine existing trees are proposed for removal. The total DBH of removal trees is 160". o Zone 2. Four existing trees are proposed for removal. The total DBH of removal trees is 120" o Zone 1. One existing tree is proposed for removal. The total DBH of removal trees is 20" • Step 3: Identify trees to be mitigated in each zone (see keynote 3 - Dark Orange). o Zone 3. One existing 30" DBH tree is proposed for mitigation o Zone 2. One existing 20" DBH tree is proposed for mitigation o Zone 1. No mitigation is allowed or proposed. • Step 4: Add required mitigation trees (see keynote 4 - Light Blue). o Two mitigation trees are required and two are proposed in Zones 3 and 2, respectively. • Step 5: Add other trees as required by code (see keynote 5 - Dark Blue). o Eleven other trees are proposed to comply with site and parking area landscape standards. The site plan otherwise complies with the proposed code because no development is proposed in the Willamette River Greenway Setback Area, or the required 10-foot wide Native Landscape Buffer. The proposed building and site development help to illustrate how the code amendments function to allow housing development in the Willamette River Greenway while providing a clear and objective path to compliance with expanded tree preservation standards. ACCESS FIGURE The proposed code amendments include access standards at EC 9.8812(4) that apply to housing that proposes five or more dwelling units on one development site. The standards require on-site pedestrian paths connecting main building entrances to the property line nearest to the Willamette River Greenway, to promote access to the river within the development site. In addition, when the development site is not within 500 feet of a defined public access point, the standards give the City the option to require the dedication and improvement of a public accessway that is 10 feet wide and Page 34 of 39 2 CAMERON McCARTHY