Industrial & Manufacturing cleanup site — Restorical Research
Harbor Island East Waterway
Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

The Harbor Island East Waterway received contaminated discharges from historical commercial and industrial operations along its shoreline, accumulating polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), dioxins/furans, arsenic, mercury, and tributyltin in its sediments. The site was listed on the National Priority List in 1983, with sediment sampling underway since 1994. A Phase I removal action in 2004–2005 excavated 273,330 cubic yards of contaminated sediment, and a second, larger cleanup phase — encompassing dredging, capping, and natural recovery — is now planned, with an interim Record of Decision expected in 2024 and an estimated ten-year construction timeframe ahead. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
AddressSeattle, King County
Historical UseIndustrial & Manufacturing
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPolychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), dioxins/furans, arsenic, mercury, and tributyltin detected in sediment
Media ImpactedSediment
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #1372

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 Washington. 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 here — PCBs, dioxins/furans, PAHs, heavy metals — is the direct product of decades of industrial and commercial discharges that predate 1986 by a substantial margin, as the 1983 NPL listing makes clear. Occurrence-based Commercial General Liability policies issued to the operators and dischargers during that pre-1986 window had no effective pollution exclusion and remain enforceable today. The documented remediation costs already incurred — 273,330 cubic yards of sediment removal — and the ten-year construction program still to come represent expenditures that historical carriers may be obligated both to recover and 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 & Forensic Accounting

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 a successful cost recovery is possible, 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.