5300 GLENWOOD AVE 2017-01-13 - Laserfiche WebLink

development, this area provides minimal protection to the adjacent stream and a low level of value for all functions. Assessment — Post Mitigation The applicant is proposing to remove from the on-site sensitive areas, twenty-five red alder that have been deemed hazardous by an arborist. Please refer to the Villas at G/enwood Terrace Tree Risk Assessment prepared by Robert W. Williams and Associates Consulting Arborists and dated October 2, 2011. The twenty-five trees proposed to be removed are in addition to the five that were cut without the benefit of a permit. Given the age and condition of the red alder to be removed, many of these trees will likely fall or die and naturally become snags at some point in the near future. Removing the selected trees and leaving the wood in place will mimic natural processes and will retain the large woody debris on-site. Removing the selected trees in the prescribed manner will also maintain the existing canopy and allow the natural successional process to continue, while at the same time avoiding injuries to residents or damage to property resulting from falling trees. Planting replacement species will help mitigate for temporal impacts as well as increase species diversity in the area. While removing the selected trees will affect the individual trees, they will continue to provide ecological value in the form of snags or downed, large woody debris. Overall, the proposed action will maintain the existing functions and values provided by this site. The applicant is proposing to clear the sapling red alder from the steep slope and stream buffer area behind Units L, M, N, and O and to replant with a mix of low growing native shrubs. This will maintain or improve the level of functions provided by this area while at the same time avoiding potential future hazard trees. After the area is restored it will have a greater diversity of species that are beneficial for wildlife and serve to stabilize the slope. Ongoing maintenance will occur within this area to prevent alder from re-establishing. BUFFER RESTORATION AND TREE MITIGATION PLAN As mitigation for the five red alders that were removed without a permit, the applicant is proposing to plant fifteen two-gallon trees throughout the wetland and buffer areas of Tract 998. This will provide a three to one (3:1) tree replacement to impact ratio as required by code enforcement. As mitigation for the twenty-five trees that will be removed under a permit, the applicant is proposing to plant fifty two-gallon trees throughout the wetland and buffer areas of Tract 998. This will provide a two to one (2:1) tree replacement to impact ratio as required by code enforcement. The following list of sixty-five two-gallon trees will be installed in Tract 998. The hemlock and serviceberry should be planted in the drier buffer areas. The Oregon ash and hawthorne should be planted in the wetlands and adjacent to the streams. Villas at Glenwood Terrace � Habitat Assessment October 10, 2011 1� WRI # 11111 �