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Comment Period

Newcastle Coal Creek Landfill

Cleanup site periodic review

Feb. 24, 2020 - April 10, 2020, 11:55 p.m.

We are providing an opportunity for public review and comment on the periodic review conducted at the Newcastle Coal Creek Landfill.

The Newcastle Coal Creek Landfill site is located at Newcastle Coal Creek Rd, Section 26, in Issaquah, WA 98027.

We invite you to review and comment on the following document:


The Newcastle Coal Creek Landfill is a closed landfill located within the Newcastle Golf Club property (the property) in the city of Newcastle, King County, Washington. The property consists of approximately 350 acres. Seventy acres were permitted for demolition landfill and 137 acres were permitted for grading and clean earth disposal.

The property and its surrounding area were historically mined for coal starting in the late 19th century. Landfilling began in the old mine pits after the mines closed. Palmer Coking Coal Company operated the landfill as a permitted demolition waste disposal site from 1970 until it was purchased by Coal Creek Development Corporation in 1985. The landfill stopped receiving demolition waste in 1992 and it was formally closed in June 1993.

Newcastle Golf purchased the Property in 1994. Since then, the property has been developed and operated as a golf course, and its surrounding vicinity has been developed for residential use.

Periodic review and public comment process

We conduct a periodic review at least every five years at cleanup sites where some contamination remains, as required by the Model Toxics Control Act (MTCA). The purposes of the review are to evaluate site conditions and to ensure continued protection of human health and the environment.

We will review comments received during the comment period and make recommendations for suggested changes. The periodic review will become final if no significant changes are made. An additional public comment period will be held if significant changes are made.

We will hold a public meeting if 10 people request one.

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Comment online

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Comment by mail

Tamara Welty
3190 160th Ave SE
Seattle, WA 98008
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Tamara Welty
Periodic Review Coordinator

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.