Industrial & Manufacturing cleanup site — Restorical Research
Centennial Mills
Multnomah County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as an industrial and manufacturing facility going back to 1910. Historical insurance policies issued during those prior operations and through 1986 could help fund the cleanup that lies ahead.

Centennial Mills operated as a flour mill from 1910 to 2000, with five underground storage tanks installed between 1943 and 1953 for fleet fueling and heating oil, plus a 12,000-gallon heating oil tank dating to approximately 1950. Diesel, oil, and polycyclic aromatic hydrocarbons (PAHs) have been confirmed in soil and groundwater, with monitoring wells along the Willamette riverbank detecting free product petroleum. Oregon DEQ issued a Record of Decision in December 2014 selecting a final remedy — removal of approximately 10,000 cubic yards of contaminated soil, capping with hardscape and clean fill, and a deed restriction — but that remedy remains unimplemented. The site was sold in September 2024 to a private developer for redevelopment, which is expected to trigger implementation of the ROD remedy under the existing Voluntary Agreement with DEQ. 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
LocationMultnomah County
Historical UseIndustrial & Manufacturing
Est. Operating Since1910
Project StatusUnassigned
Contamination & Investigation
Site Assessment Summary
ContaminantsDiesel, oil, and polycyclic aromatic hydrocarbons (PAHs) in soil and groundwater, with free product petroleum detected in monitoring wells
Regulatory ProgramOregon DEQ — Cleanup Program / VCP
DEQ ECSI #5136

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 originated from industrial flour milling operations dating to 1910 and underground storage tanks installed between 1943 and 1953, all in place and operating decades before 1986. The major remediation work ahead — removal of approximately 10,000 cubic yards of contaminated soil, capping with hardscape and clean fill, deed restriction compliance, and continued groundwater monitoring as directed by Oregon DEQ's 2014 Record of Decision — represents substantial future 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

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.