Spokane River Metals Myrtle Point

• About 84 tons of contaminated sediment was excavated and disposed at the Graham Road landfill in Medical Lake.
• Remaining metals-contaminated soil was covered with a protective cap to limit exposure to humans and wildlife.
• The area was replanted with native riparian vegetation.

Ecology completed the first periodic review in 2022. The report is for all the Spokane River shoreline sites affected by mining contaminants. The purposes of the review are to evaluate site conditions about every five years when contaminants are capped and ensure the cleanup continues to protect human health and the environment.

The cleanups continue to protect human health and the environment from the capped contaminated sediments. However, contaminant concentrations have increased in some cases, and new contaminated sediments have been deposited on the caps. This likely means upstream sources are continuing to impact the river and could pose a risk to human health and the environment if they are not controlled.

We will continue monitoring to ensure that the sites continue to be safe for human health and the environment. A monitoring study evaluating sediments entering the site at the Washington-Idaho border would help assess the potential for recontamination.