Landfill cleanup site — Restorical Research
Howerton Silverdale Landfill
Silverdale, Kitsap County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a landfill going back to 1940. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

The Howerton Silverdale Landfill operated from the 1940s through 1980, accepting mixed municipal solid waste, demolition waste, sludge, coal ash, and industrial waste across up to 40 acres in Kitsap County. Contamination seeps were discovered in 1996, and a compacted soil cap has since been installed to contain contaminants. The site lacks a liner and leachate collection system, and no active remediation beyond the cap has commenced. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Landfill
AddressSilverdale, Kitsap County
Historical UseLandfill
Est. Operating Since1940
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsLeachate from mixed municipal solid waste, demolition debris, sludge, coal ash, and industrial waste, observed as seeps
Media ImpactedSoil, Groundwater, Surface Water
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #3297

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.

A landfill that accepted municipal solid waste alongside coal ash, industrial waste, and sludge across a four-decade operating window presents a layered contamination profile tied directly to pre-1986 operations. The site's engineering shortfall — a soil cap with no underlying liner or leachate collection system — means the contamination pathways remain only partially addressed, and future remediation costs are anticipated. Historical carriers whose policies covered the landfill's operators during the 1940s–1980 period may be obligated to fund the cleanup work that a cap alone cannot complete.

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.