ST Enclosure C

Refer to Figures 1 and 2 and Enclosure B for aquatic resources and location of these resources in the specified areas discussed below. In addition, Table 1 includes a summary of on-site impacts and wetland classifications in the project area, and Table 3 includes details of on and off-site impacts by project area, creek basin, acreage, and Cowardin/HGM classification for each project area as specified below. MILLER CREEK BASIN A. Runway Safety Area/North Airfield Aquatic resource impacts in this area include 2.75 acres of wetland impacts, and filling 980 linear feet of Miller Creek. Impacts also include filling 5.24 acre-feet of the Miller Creek floodplain. The wetland impacts include 1.22 acres of PFO impact; 0.27 acre of PSS impact; and 1.26 acres of PEM impact. The majority of impacts are occurring to slope wetlands, which are the predominant HGM class in the area. This area contains approximately 27.84 acres of wetlands. The proposed projects will impact approximately 10% of the wetlands in this complex. Water Quality Functions The nutrient/sediment trapping function of the wetlands impacted would be eliminated. In some areas (FW5 and 6) the potential for the wetland to generate sediments and nutrient runoff from recently plowed earth and the introduction of contaminants to the receiving waters (i.e. farming chemicals) would be reduced by eliminating farming in this area. Hydrologic Functions Filling 2.75 acres of wetlands in this area would eliminate areas where seasonal or perennial saturation supports wetlands. The fill in this area is not likely to alter…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]