Landfill cleanup site — Restorical Research
Interbay Landfill
Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a landfill predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

The Interbay Golf Center complex was constructed on a former City of Seattle landfill, and drilling activities at the site generated contaminated soil and water requiring regulated offsite disposal. That characterization effort produced four 55-gallon drums of waste material — one classified as dangerous waste under Washington regulations and three as regulated waste. The site is currently awaiting cleanup under the state's Standard Cleanup program. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Landfill
AddressSeattle, King County
Historical UseLandfill
Est. Operating SincePre-1986
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsContaminated soil and water from historical landfill fill material, including dangerous waste and regulated waste generated during drilling
Media ImpactedSoil, Groundwater, Surface Water
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #17

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 at this site originates from the City of Seattle's own historical landfill operations — a municipal entity that, like private industrial operators of that era, would have carried occurrence-based Commercial General Liability policies covering claims arising from those operations. The fill material placed during those pre-1986 municipal landfill years is the direct source of the dangerous and regulated waste now requiring disposal. That chain of custody — from City-operated landfill to present-day regulated cleanup — anchors the liability exposure squarely to the historical carriers who insured Seattle's landfill operations before pollution exclusions became standard.

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.