6307 36TH AVE W 2021-12-16 - Laserfiche WebLink

Overall, the proposed fill slope results in benefits to wildlife habitat and public safety rather than detriments that would occur from construction of a retaining wall. Temporary Buffer Impact and Storm water Conveyance The applicant is proposing to install stormwater conveyance pipes in two separate locations within the on -site buffer areas. A conveyance pipe flows out of the north end of the detention pond east of Wetland A will result in a total of 7,913 square feet of temporary buffer impacts. The temporary buffer impact areas associated with Wetlands A and C will be restored through planting native shrubs. The anticipated buffer impact areas are 15-feet wide (7.5-feet on either side of the conveyance pipe). For a detailed plant list for proposed temporary buffer impacts, refer to the Temporary Buffer Impacts to be Restored section included in this report. In addition, 1,900 square feet of temporary buffer impacts will result from a conveyance pipe within the buffer between Wetland E and Wetland F. Currently the area where the pipe will be placed is comprised of an old roadbed, with no significant native vegetation. Due to existing conditions, the applicant is proposing to grass seed this temporary buffer impact area. WETLAND AND STREAM CLASSIFICATIONS - COWARDIN SYSTEM The wetland and stream classifications applicable to this site according to the Cowardin System, as described in Classification of Wetlands and Deepwater Habitats of the United States, are as follows: Wetlands A - F: Palustrine, Forested Wetland, Broad-leaved Deciduous, Saturated Streams A and B: Riverine, Intermittent, Streambed, Mud Stream C: Riverine, Lower Perennial, Cobble Gravel WETLAND AND STREAM CLASSIFICATIONS - CITY OF EVERETT Under the City of Everett's Municipal Code, Chapter 37, the on -site wetlands and streams are classified as follows: Wetland A (Category III): This forested, slope wetland received a total score for functions of 40 points with a habitat score of 15 on the DOE Wetland Rating Form for Western Washington (Version 2). Category III wetlands with habitat scores of less than 19 typically receive 60-foot protective buffers. Wetland B (Category III): This forested, depressional wetland received a total score for functions of 31 points with a habitat score of 12 on the DOE Wetland Rating Form for Western Washington (Version 2). Category III wetlands with habitat scores of less than 19 typically receive 60-foot protective buffers. Wetland C (Category III): This forested, depressional wetland received a total score for functions of 46 points with a habitat score of 15 on the DOE Wetland Rating Form for Critical Area Study and Buffer Mitigation Plan 3 WRI# 09084 Intermec- Lot 2 Revision#2: March 22, 2010