This property has a documented history as an industrial and manufacturing facility going back to 1926. Historical insurance policies issued during those prior operations and through 1986 could help fund the ongoing and future cleanup under Oregon DEQ oversight.
Underground mining at this property began in 1926 as the Silver Butte Mine, with sulfide mineral extraction (pyrite, chalcopyrite, sphalerite) continuing until 1937 and resuming briefly from 1990 to 1993 under Formosa Exploration Inc. Acid rock drainage from the network of underground mine workings has been discharging to Middle Creek and South Fork Middle Creek since the drainage control system failed in 1997, with extensive contamination confirmed in surface water, groundwater, and stream sediment. The site was listed on the EPA National Priorities List in 2007, and while a Record of Decision for Operable Unit 1 was issued in 2016, the Operable Unit 2 Remedial Investigation was only finalized in October 2025 — meaning remedy selection and full remediation for the site's water and sediment contamination remain ahead. That history could support an insurance coverage claim against the carriers who issued policies more than 40 years ago — coverage that could help fund the cleanup ahead.
Why Historical Insurance Policies May Be Accessible
Pre-1986 Commercial General Liability (CGL) policies were occurrence-based and did not contain an effective pollution exclusion in Oregon — and those policies may provide coverage that remains enforceable today. If contamination occurred while those policies were active, those historical insurance carriers may still have a legal obligation to fund the cleanup costs, even if the business closed or the property changed hands.
The contamination at this property traces directly to sulfide mining operations that began in 1926 and continued through 1937 — decades before 1986. With the Operable Unit 2 remedy not yet selected and full-scale remediation, long-term water treatment, and ongoing monitoring still ahead under coordinated EPA and Oregon DEQ oversight, this site faces substantial future cleanup costs that historical pre-1986 carriers may be obligated to fund.
Restorical's role is to locate viable historical policies, determine whether a successful coverage claim is possible, and assist our clients and their legal counsel to obtain insurance coverage. Restorical then manages the claim, including accounting, to ensure the cleanup is funded in a timely manner.
What We Look For
- Historical insurance policies (pre-1986)
- Policy numbers, carrier names, and coverage periods
- Connection between contamination timing and policy period
- Evidence linking cleanup obligation to insured activity
What We Deliver
- Historical Coverage Chart
- Trigger Analysis & Property/Policy Nexus
- Coverage strategy with recommendations
- Insurance funding for your remediation
- Claims Management
The Restorical Proven Process
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Contact UsThis analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.