Landfill cleanup site — Restorical Research
First Ave Bridge Landfill
Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a landfill going back to 1960. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

The First Avenue Bridge Landfill operated as a WSDOT landfill receiving construction debris and asbestos waste, with Bayside Disposal Company alleged to have used the site for landfilling from 1969 to 1972; facility construction dates to 1960 and 1964. Remediation completed to date includes removal of four underground storage tanks — two 1,000-gallon fuel tanks and two 300–500-gallon waste oil tanks — soil excavation for petroleum-impacted material, and a corrective action for a grading ordinance violation. Groundwater monitoring is an ongoing multi-year effort, and future construction dewatering will require treatment to reduce lead concentrations or managed discharge to the sanitary sewer; no active cleanup of the broader site has yet commenced. 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 Since1960
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (TPH), vinyl chloride and other VOCs, lead, and metals detected in soil and groundwater
Media ImpactedSoil, Groundwater, Surface Water, Air
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #1427

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.

Contamination at this property — petroleum hydrocarbons, vinyl chloride, lead, and metals — originates from landfill and fueling operations active from at least the early 1960s through the 1970s, more than a decade before the 1986 threshold at which occurrence-based CGL policies began including effective pollution exclusions. Carriers who issued policies to WSDOT or to operators like Bayside Disposal Company during that window wrote coverage that applied to exactly this kind of slow, diffuse release from historical land use. The cleanup costs still ahead — continued groundwater monitoring, lead treatment of construction dewatering, and broader site remediation — represent expenditures that those historical 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 & 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.