Landfill cleanup site — Restorical Research
Enumclaw Landfill
1650 Battersby Ave E, Enumclaw, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a landfill going back to 1950. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

The Enumclaw Landfill operated as a municipal solid waste facility beginning in the early 1950s, with refuse burned on-site until 1958 and active filling continuing through 1990. Remedial work completed at the site includes removal of an unlined leachate pond, installation of a geomembrane final cover, surface water controls, and a landfill gas control system that has evolved from active flaring to passive biofiltration. Groundwater and landfill gas monitoring, cover settlement surveys, and maintained financial assurance remain ongoing obligations under the 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
Address1650 Battersby Ave E, Enumclaw, King County
Historical UseLandfill
Est. Operating Since1950
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsLeachate-derived groundwater contamination and landfill gas (LFG) from historical municipal solid waste disposal
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #1308

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 driving cleanup obligations at this site — leachate migration, landfill gas generation, and groundwater quality degradation — originated from decades of municipal solid waste disposal that began in the early 1950s, long before effective pollution exclusions entered the CGL market in 1986. Occurrence-based Commercial General Liability policies issued to the landfill's operators during that pre-1986 window may carry enforceable obligations tied to those historical releases. The cleanup costs still ahead — continued long-term monitoring, potential additional remediation, and ongoing financial assurance — could plausibly be funded by historical carriers whose policies were in force while the contamination was accumulating.

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.