Ross Island

Environmental Cleanup Site Information Number (ECSI):   2409
County:  Multnomah
City:  Portland
Region: Northwest  

Contact Information

Project Manager:  Jennifer Sutter
Phone: 503-229-6148
E-mail: 

Site Summary

The site is located at approximately river mile 15 of the Willamette River, about one mile upstream of downtown Portland. Ross Island Sand and Gravel Co. (RISG) mined gravel from the lagoon between 1926 and 2001. Beginning in 1980 they were required to reclaim the mined area and, to accomplish this, began importing fill to the site. Some of this fill was contaminated and was required to be capped with clean material. In the late 1990s DEQ required the Port of Portland (primary source of contaminated fill) and RISG to investigate the adequacy of the confinement of the contaminated material and environmental conditions in general. A Record of Decision (ROD) was signed in 2005 laying out long-term containment, monitoring, and management protocols that RISG must adhere to. This work will be integrated with on-going reclamation activities that RISG is completing under a permit with the Division of State Lands. Click here for more summary information.

Current Documents and Supporting Information

General Information

• No Further Action Recommendation Memo PDF
• Ross Island Update - March 2011 PDF
• Technical Assistance Panel (TAP)
  Panel biographies.
• Division of State Lands
  Link to external web page.
• Investigation Updates and Evaluation Reports
  • Ross Island Sand and Gravel Investigation
  • Port of Portland Investigation
• Questions & Answers
  About the Ross Island risk assessment project.
• Press Release
  Keyword "Ross Island" to search for most recent news release.
• Contact List

Ross Island Reclamation Fill Evaluation

• Fact sheet: Ross Island Fill Evaluation PDF
• Fill Evaluation Scope of Work PDF
• Screening Level Tables
  • Table 1 PDF
    Ross Island Screening Levels - Lagoon
  • Table 2 PDF
    Ross Island Screening Levels - Upland
• Fill Fact Sheet Table 1 References PDF
• Screening Level Calculations and Data Sources PDF
• Analyses for Dredge Sediment Characterization PDF
• Sediment Chemistry Laboratories PDF
• Quality Assurance/Quality Control PDF

Cleanup Selection/Evaluation

• Record of Decision PDF
  • Figure 1 PDF
  • Figure 2 PDF
  • Figure 3 PDF
  • Figure 4 PDF
  • Figure 6 PDF
  • Table 1 PDF
  • Table 2 PDF
• Feasibility Study Addendum PDF 4MB
  • Feasibility Study Addendum Comments by DEQ PDF
• Feasibility Study PDF
• Supplemental to Consent Order: Remedial Action Implementation Schedule PDF

[print version]