This property has a documented history as a public works and maintenance facility going back to 1967. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.
The Denny Way Combined Sewer Overflow (CSO) site, located along Seattle's Alaskan Way waterfront, was constructed in 1967 by the Municipality of Metropolitan Seattle — later consolidated into King County — as part of the regional wastewater collection and treatment system, with antecedent sewer infrastructure at the location dating to the nineteenth century. Cleanup activities have included two phases of sediment capping beginning in 1990, mechanical dredging and off-site disposal of 14,000 cubic yards of contaminated sediments, and backfilling and armoring with more than eight feet of material. Monitoring and investigation have been ongoing since 1987 and are scheduled to continue through at least 2025, with King County bearing all associated costs. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.
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 sediment contamination documented at this site is attributable to CSO discharges that operated continuously from the 1960s through the early 1980s, a period squarely within the era of occurrence-based Commercial General Liability policies that carried no effective pollution exclusion in Washington. The Municipality of Metropolitan Seattle and its successor King County would have held such policies during those pre-1986 decades of operation. The site's documented remediation costs — sediment capping, large-scale dredging, long-term monitoring extending into 2025 — represent expenditures both already incurred and still accumulating, which historical carriers may be obligated 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
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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.
