Port Packages mapped

Structures with Port of Seattle avigation easements

As the icon indicates, this is a beta project, one of a series of visual representations on community impacts. This indicates homes and schools that received sound insulation, or if your property was, or is, inside different versions of the eligible noise contour known as DNL65.

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Base Map Opacity: 100%

Install Year

SIRRPP 2024 Survey 3191

SIRRPP 30 Homes Acoustic Testing August 2024 30

Des Moines 1990 Aerial

Des Moines Tree Canopy

Forterra 2017 Land Cover

Background

When the Port of Seattle conducted their initial Part 150 Study in 1985, there were at least 11,000 structures inside the eligible boundary area. Since then, it has conducted four more, including the current one. Since then, the boundary, and the structures included within those boundaries, have changed significantly.

All the checkboxes let you see two main types of data:

The major versions of those boundaries (1991, 2018, ¹2032)
The homes and schools inside each boundary which are (or were) eligible for sound insulation, and a filter to limit the display to each of the cities

There are also several bonus layers:

The Permanent Noise Monitors, the Port uses to track Noise Events, although these do not play a part in determining those boundaries
The schools inside each boundary layer
SIRRPP Surveyed – the homes that were surveyed in 2024 for possible updates to their existing Port Packages
SIRRPP Acoustic Testing – the homes that were acoustically tested in 2024 for possible updates to their existing Port Packages
An overlay of Des Moines, which we will be expanding to other cities to explain the system of property buyouts and other changes to the land use (eg. tree canopy) as a result of airport expansion

Notes

Since the Port of Seattle is conducting a new Part 150 Study, the map now includes contours for the 2032 DNL65 and DNL70 contours.

A contour is not a boundary. The contour is the geometry that looks like an oval. That gets established in the first phase of a Part 150 Study. The final ‘boundary’ is the area inside of which homes will be eligible. It will generally have many edges which align with street divisions.

To receive sound insulation (known as Port Packages) property owners sign an Avigation Easement, so technically, this map shows you only homes that signed that document. As of this update, there are less than 50 homes that have not.

Although the vast majority of structures are within Burien, Des Moines and SeaTac, there are still a significant number of structures are in Kent and Seattle.

¹Speculative and subject to frequent change! Based on a presentation of the possible 2032 boundary by the Technical Review Committee of the current Part 150 Study.

Upcoming Events

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 [...]