5900 36TH AVE W SEPA 015 - 034 - SOUNDVIEW BUSINESS CAMPUS - VERITAS Land Use Decision Documents 2025-04-22

' While no work is proposed within Edgewater Creek channel or associated wetlands, grading and clearing could potentially mobilize sediment that could affect this feature. As a result, this project may temporarily degrade this habitat parameter. The long-term effect of this project will be to maintain this parameter. LaNe Woody Debris (LWDJ Edgewater Creek has a large amount of large woody debris comprised of a wide variety of sizes. The relatively intact forested slopes bordering the stream provide ample recruitment for large woody debris. Due to the existing high density of LWD and the potential for LWD recruitment from the surrounding forested landscape, the action area is properly functioning for this parameter. LWD recruitment potential for a stream typically occurs within 200 feet of the OHWM. The subject development site is more than 600 feet from Edgewater Creek fish habitat. Any trees to be removed from the project site would not result in an impact on LWD recruitment potential for Edgewater Creek. The proposed project will therefore maintain the parameter for LWD. ' Pool Frequency and Quality The NOAA Matrix of Pathways and Indicators (1996) considers a properly functioning pool frequency to be 96 pools per mile for a stream about 10 feet wide. Overall, the pool frequency in Edgewater Creek is very low. Within the lower reaches, almost the entire stream is comprised of riffle habitat. Based on this condition, Edgewater Creek is considered not properly functioning for this parameter As no development is proposed within or near the OHWM of Edgewater Creek, the project will maintain the baseline condition for this parameter. 0ff- Channel Habitat No off -channel habitat was observed north of W. Mukilteo Boulevard. This area comprises the reach considered as potentially fish -bearing by Washington Department of Natural Resources (WDNR) and USFWS. Therefore, this parameter shall be considered not properly functioning. This project will maintain the baseline condition for this parameter because development will not occur within any existing off -channel habitats. Re is Edgewater Creek is situated within a relatively intact sloped forested area, and is protected by a variety of overhanging vegetation and LWD. These features provide potential refugia for fish that may be present. Therefore, this parameter is considered properly functioning in the Edgewater Creek action area. This project will maintain the baseline condition for this parameter. Biological Evaluation 15 WRI #14109 Soundview Business Campus Revision #2: October 2, 2015