Notes
Memorandum dated August 7, 2001, from Katie Walter (Shannon & Wilson, Inc.) to Ann Kenny (Washington State Department of Ecology), marked ‘Deliberative – Do Not Disclose,’ regarding draft 401 conditions for the Port Of Seattle Natural Resources Mitigation Plan (NRMP), Auburn Mitigation Site. Document addresses culvert placement issues in the revised grading plan (June 28, 2001), including mislocated culvert in south central portion, culvert length concerns in northwest corner drainage swale, and two additional culverts needed along the new drainage swale at the southwestern basin. Performance standards section covers 15-year monitoring requirement, invasive species monitoring (hedge bindweed Convolvulus sepium, giant knotweed Polygonum sachalinense, evergreen blackberry Rubus laciniatus), non-native plant cover limit of 10%, shade cloth details for new channel (Table 5.1-7), hydrologic monitoring using piezometers, wetland boundary delineation at years 5/10/15 (Vacca farm, borrow sites, Auburn mitigation site), replacement drainage channel 100-year 24-hour storm standard, Wetland Indicator Status (WIS), and soil saturation standards. Exhibit-2101, AR 033698, ECY00021960.