2202 100TH ST SW 2023-02-07 - Laserfiche WebLink

Stephens Property Critical Areas Report and Mitigation Plan ASSESSMENT OF DEVELOPMENT IMPACTS: The proposed project results in no direct impacts to Wetlands A or B. No impacts are proposed to the Wetland B buffer. However, impacts to the buffer of Wetland A are anticipated to accommodate the required access road off 100th Street SW, as well as for the installation of two (2) stormwater outfall structures. Finished floor elevations necessitate a wall along the eastern edge of the proposed development to minimize impacts to Wetland A and its buffer as much as possible while maintaining a safe access point from the north. The Wetland A buffer will be reduced by approximately 2,528 sf along the western and southern sides as part of the buffer averaging plan. The anticipated impacts associated with the two (2) outfall structures will result in approximately 1,492 sf of temporary construction impacts. PROPOSED MITIGATION: Mitigation to offset the reduced buffer and wetland as buffer impacts to Wetland A include the replacement of the reduced buffer area at an almost 3:1 ratio with additional buffer and wetland enhancement proposed. A total of 9,548 sf of additional buffer will be provided to offset the reduced buffer, for a net gain of approximately 7,020 sf. Standard and best management practices (BMP) mitigation measures will be proposed to ensure no net loss of wetland or buffer function. These mitigation measures are intended to offset the functions and values potentially impacted by the proposed development, especially given the proximity of the development to Wetland A. All temporary construction impacts along the proposed wall and stormwater outfall locations will be fully restored by replanting the area with native species. Attempts will be made to preserve intact vegetation and trees to the greatest extent practicable while installing the stormwater outfalls. Five (5) years of performance monitoring will be required for the planted mitigation areas, as well as placement of all critical areas into a separate tract, or equivalent. 6 March 2020 Copyright © 2020 Talasaea Consultants, Inc. 1807 CAR V4 Page ii