Industrial & Manufacturing cleanup site — Restorical Research
Black Butte Mine
Lane County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as an industrial and manufacturing facility going back to 1895. Historical insurance policies issued during those prior operations and through 1986 could help fund the ongoing and future cleanup under Oregon DEQ oversight.

Black Butte Mine was developed in the late 1890s and operated under successive owners until final closure in the late 1960s, ranking as the fourth largest producing mercury mine in Oregon. Mercury contamination has been confirmed in Dennis Creek sediment at 48 ppm, in surface water runoff reaching nearby streams and Cottage Grove Reservoir, and arsenic has been detected in several nearby domestic wells. Oregon DEQ designated the property an Orphan Site in 2002, and the EPA added it to the National Priorities List in March 2010; the site remains under active federal and state oversight as an assigned cleanup project with full remediation still 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.

Former Use
Former Industrial & Manufacturing
LocationLane County
Historical UseIndustrial & Manufacturing
Est. Operating Since1895
Project StatusAssigned
Contamination & Investigation
Site Assessment Summary
ContaminantsMercury in sediment and surface water, arsenic in nearby domestic wells
Regulatory ProgramOregon DEQ — Cleanup Program / VCP
DEQ ECSI #1657

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 mercury and arsenic contamination at this property traces entirely to mining operations that began in the late 1890s and continued under successive operators until final closure in the late 1960s, placing roughly seven decades of contaminating activity squarely before 1986. The investigation, remediation, and long-term monitoring work that lies ahead — spanning contaminated sediment, surface water pathways, and impacted drinking water wells — represents substantial ongoing and future costs that historical pre-1986 carriers may be obligated to fund going forward.

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

Task 1 — Research and Analysis
Restorical searches for viable historical insurance policies, researches the site history, analyzes the contamination impacts, and underwrites potential coverage — including a proprietary trigger analysis. At the end of Task 1, we provide a clear yes or no on whether viable insurance coverage exists to fund the cleanup, along with a strategy and recommendation specific to your situation, even if you are not the policyholder.
Task 2 — Coverage and Funding
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim, negotiate and secure insurance coverage. Restorical will manage the ongoing claim process, including accounting to ensure the insurance companies are funding your remediation in a timely manner.

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This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.