Noise Boundary Maps 2013, 2018, 2021

If you live in the area, you may hear about ‘Noise Boundary Maps’. These are maps with a boundary drawn showing the furthest extent of the DNL65. Your residence must be within this boundary in order to be eligible for ‘The Port Package’, ie. insulation and triple-pane windows. (However, there are other criteria discussed in the topics Avigation Easements and DNL65.)

2013 Boundary

This is the 2013 boundary, taken from the most recent Part 150 Study by Landrum & Brown:

Part 150 Study 2013 NEM from e-Chapter-3_Noise Analysis pg109

2013-2018 Projection

Here is that same 2013 boundary from the same study along with the projected 2018 boundary:

Part 150 Study 2013 vs 2018 NEM comparison from e-Chapter-3 Noise Analysis pg. 115

Projected 2021 Boundary

And here is the projected 2021 boundary taken from the October 11, 2016 Airport Noise Insulation Project briefing:

Port Of Seattle – Airport Noise Insulation Project PPT

This entire document should be studied thoroughly as this provides almost the entire set of Port talking points on what they feel they have done for the community and how they view their relationship to us. But for now, take a look at pages seven and eight. They make the outrageous claim that the Noise Boundary will actually decrease over time because ‘aircraft are getting so much quieter’!

Appendix F

Finally, there are several plots in this portion of the Part 150 Study and the entire document is worth studying because it provides several different ways to define ‘noise’ scientifically.

2013 Part 150 Study – Appendix F – Supplemental Noise Analysis

One Reply to “Noise Boundary Maps 2013, 2018, 2021”

  1. 1. 2018 and 2021 noise maps are outdated because they do not reflect increased operational levels at Sea Tac since 2013;
    2. FAA and Sea-Tac’s own policies permit homes built after 10-1-98 to participate in sound insulation program; however, Sea-Tac’s powerpoint describes two different criteria. Why?
    3. According to FAA’s recent CATEX report to City of Burien in April 2018, 5.2% of study area is now eligible for sound insulation. Another indication that Sea-Tac’s noise maps require updating.
    4. Earliest sound insulation installations by Sea Tac did not include ventilation improvements. Failed window installations by Sea-Tac should be addressed via a new window replacement program (i.e. San Francisco’s program).

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