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Ross Island (River Mile 15.4)

Summary Information
(last updated on: 10/11/2016 12:45:52 PM)
[August 2011] The site is located at about river mile 15 of the Willamette River, a mile upstream of downtown Portland. Ross Island Sand and Gravel Co. (RISG) mined gravel from the lagoon between 1926 and 2001. Beginning in 1980 RISG was required to reclaim the mined area and therefore 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 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. In 2011, DEQ conditionally approved environmental cleanup actions at RISG (also known as a conditional no further action decision). DEQ also issued a certificate of completion to RISG for remedial action obligations described in its consent order with DEQ. DEQ also issued a new consent order with Ross Island to cover oversight of long-term monitoring and maintenance of the completed remedy. Annual monitoring has been completed and reports issued in August 2012, 2013, 2014, 2015, and 2016.

For more information about this project, see the documents posted below, as well as DEQ's Ross Island web page (site links section below).
General Site Information
Site: Ross Island (River Mile 15.4) (ECSI Site ID: 2409) CERCLIS (EPA) Id
Project Manager: N/A - Project Completed. Investigative Status:Listed on the Confirmed Release List or Inventory
PM Phone: NPL(National Priority Listing):No
Address: Within the interior of Ross Island, in Willamette River Is this site an Orphan?No
Portland, 97202 Is this site a brownfield?No
County: MULTNOMAH Action Underway or Needed: No Further Action (Conditional)
Region: Northwest Region Click for more details ...  
NOTE: This site has one or more long-term controls designed to manage site risks. Click here for details.

Site Documents
Click the link to view the document.
File NameCategory File Size MB Document Date Upload Date
fact sheet Jan_2011.pdf Fact Sheets 0.8553 8/29/2011
Ross Island - NFA memo with figures.pdf Miscellaneous 2.2970 3/14/2011
Consent Order for Long-Term Monitoring (2011).pdf Orders/Consent Judgments 8.9689 7/22/2011 12/20/2017
ROD for Ross Island, Dec. 05 [ECSI No.2409].pdf RODs/Staff Reports 0.1228 10/16/2007
Ross Island cell locations.pdf RODs/Staff Reports 0.0422 10/16/2007
Ross Island hot spots.pdf RODs/Staff Reports 0.3473 10/16/2007
Ross Island remedial action areas.pdf RODs/Staff Reports 0.2431 10/16/2007
Ross Island vicinity map.pdf RODs/Staff Reports 0.3410 10/16/2007
Ross Island Sand and Gravel - NFA and Certification of Completion.pdf Signed NFA letters 0.3605 7/5/2011
Site Links
Click the link to open the web page.
DEQ's Ross Island page Current documents and supporting information about the project.
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Department of Environmental Quality
700 NE Multnomah Street, Suite 600 Portland, OR 97232
Hours: Mon-Fri, 8 a.m.-5 p.m

Email: DEQInfo@deq.state.or.us | Phone: 503-229-5696 | Fax: 503-229-6124

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