Spokane River Metals Islands Lagoon
Site Background
Cleanup
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.
Documents 10
Public Information 2
| Document Title | Document Date | Document Type |
| Response to Comments: Periodic Review for the Spokane River Shoreline Metals Sites | 11/10/2022 | Responsiveness Summary |
| Spokane River Metals Sites Four Beaches Proposed for Cleanup Design Documents, SEPA, Substantive Permit Requirements | 5/17/2012 | Fact Sheet\Public Notices |
State Environmental Policy Act 2
| Document Title | Document Date | Document Type |
| Spokane River Metals Islands Lagoon DNS | 5/17/2012 | SEPA Documents |
| Spokane River Metals Islands Lagoon SEPA Checklist May 2012 | 3/8/2012 | SEPA Documents |
Technical Reports 6
| Document Title | Document Date | Document Type |
| Periodic Review: Spokane River Shoreline Metals Sites | 9/21/2022 | Periodic Review (5 Year) |
| Spokane River Beach Sites 2019 Report | 6/14/2019 | Site Specific Technical Document - other |
| Spokane River Shoreline Sediment Sites Heavy Metals (As, Cd, Pb, Zn) Post-Remediation Monitoring | 4/1/2015 | Performance/Confirmational Monitoring Plan or Report |
| Spokane River Shoreline Sediment Sites Heavy Metals (As, Cd, Pb, Zn) Monitoring, Sampling and Analysis Plan | 9/1/2013 | Sampling and Analysis Plan |
| Spokane River Capping Construction Completion Report | 7/31/2013 | Final Cleanup Action Report |
| 90 Percent Design River Sediment Capping Design - Spokane River Metals - Islands Lagoon | 5/3/2012 | Engineering Design Report |
Places to see print documents
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Eastern Regional OfficeN 4601 Monroe StSpokane, 99205-1265Please schedule an appointment to view print documents at this location.
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Argonne County Library4322 N. ArgonneSpokane, 99206This location may only have print documents available during open comment periods.
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Spokane Valley Public Library12004 East MainSpokane Valley, 99216This location may only have print documents available during open comment periods.
Contaminants 1
| Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
|---|---|---|---|---|---|---|
| Metals - Metals - Other | C |
- S
- Suspected
- C
- Confirmed Above Cleanup Levels
- B
- Below Cleanup Levels
- RA
- Remediated-Above
- RB
- Remediated-Below
- R
- Remediated