A July 9, 1984 letter from Port of Seattle to United Airlines Vice President Captain M. E. Volz outlines the noise abatement procedures in use at Seattle-Tacoma International Airport. The procedures include FAA-established Standard Instrument Departure (SID) routes using the Seattle VOR 158 and 338 radials to minimize noise over surrounding communities, a Visual Bay Approach for south flow arrivals, and a Run-Up Curfew with designated engine run-up locations. The letter also notes that the most noise-impacted areas fall within the 65 Ldn noise contour, where the Port was pursuing land acquisition, purchase assurance, and sound insulation programs as remedies.Open full document
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July 9, 1984 letter from Port Of Seattle to Captain M. E. Volz, Vice President of Flight Safety and Industry Affairs at United Airlines, summarizing noise abatement procedures at Sea-Tac International Airport. Covers FAA SEA TWR 7110.071C (10/7/80) noise abatement procedures, Standard Instrument Departure (SIDs) using Seattle VOR 158 radial for south flow and VOR 338 radial for north flow departures, Visual Bay Approach for south flow arrivals, Port of Seattle Run-Up Curfew per Section 7 Paragraph D of Schedule of Rules and Regulations No. 4, and the 65 Ldn noise contour remedy programs including land acquisition, purchase assurance, and sound insulation.