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.
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
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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.


