2320 106TH ST SW 2025-07-21 - Laserfiche WebLink

water. Wetlands improve water quality by acting as filters as water passes through them, trapping sediments and pollutants from surface water. Ponded areas within depressional wetlands also allow sediments to drop out of suspension, thereby increasing water quality. As development increases, the potential for polluted water to reach wetlands and streams also increases. Unnaturally high inputs of pollutants, which are often found in urbanized areas, along with the size of the wetlands and the vegetation structure within them are the main limiting factors of this function. Wildlife Habitat Wetlands have potential to provide diverse habitat for aquatic, terrestrial, and avian species for nesting, rearing, resting, cover, and foraging. Wildlife species are commonly dependent upon a variety of intermingled habitat types, including wetlands, adjacent uplands, large bodies of water, and movement corridors between them. Human intrusion, including development within and adjacent to wetlands, and impacts to movement corridors are the most limiting factors for wildlife habitat functions. Value Assessment Wetland A is a shallow depressional wetland with no obvious outlet. Its vegetation canopy consists of mostly emergent species with a fringe of alders along the edges. While saturation was detected during the May 11, 2015 site investigation, no indicators of significant seasonal pending were found. As such, this wetland appears to offer moderate levels of hydrologic control and water quality improvement functions. Wetland B is mostly forested. Standing water was observed within the deeply depressional portions of the wetland. No obvious outlet was identified, but it appears that a highly constricted offsite outlet may feed into a small seasonal stream south of the site. This drainage is likely to flow toward Swamp Creek, more than a mile downstream. Based on its physical characteristics and its moderate scores on the DOE Wetland Rating Form, Wetland B has potential for providing valuable water quality improvement and hydrologic control functions. Due to the surrounding mix of commercial and high -intensity residential land use, both Wetlands A and B are isolated from other diverse habitats and are more than a mile from any WDFW priority habitats. The vegetated buffers offer some habitat for small birds and mammals, but in general, the buffers contain limited diversity or special habitat features. Both wetlands received relatively low scores for habitat functions because of their limited vegetation structures, lack of plant diversity, low habitat interspecies, and lack of special habitat features. Conclusion: Based on existing conditions and evidence of scores on the DOE Wetland Rating Forms, the on -site wetlands offer low to moderate levels of functions for the typical wetland functions discussed above. Minor buffer alterations through averaging, in compliance with Everett Municipal Code requirement, are expected to have no impact on the functions and values offered by Wetlands A and B. Critical Area Study and Buffer Averaging Plan March 16, 2016 C & D Land Co. 106th Street SW 6 WRI #15111