August 3, 2001August 2, 2026

EXH AR018276: Draft 401 Conditions for Port Of Seattle NRMP Auburn Mitigation Site — Memorandum from Katie Walter to Ann Kenny

Notes

Deliberative memorandum dated August 3, 2001 from Katie Walter (Shannon & Wilson, Inc.) to Ann Kenny (Washington State Department of Ecology), transmitting revised draft 401 conditions for the Port Of Seattle Natural Resources Mitigation Plan (NRMP) Auburn Mitigation Site. Document 21-1-12020-001-M1 REVISED.doc covers Auburn Mitigation Site revisions including culvert placement issues on June 28, 2001 grading plan (northwest corner drainage swale, south central mis-located culvert, southwestern basin maintenance pathway), and performance standards including 15-year monitoring requirement, invasive plant species cover limits (10%), hedge bindweed (Convolvulus sepium), giant knotweed (Polygonum sachalinense), evergreen blackberry (Rubus laciniatus), shade cloth installation for new channel, TESC measures, hydrologic monitoring using piezometers, and contingency measures. CC to Erik Stockdale. AR 018276–018278, DOE 8/13/01 0387–0389.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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