This property has a documented history as a industrial and manufacturing facility predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.
The Sierra Pacific Industries Shelton Roundhouse site has a documented history of industrial fuel storage, with above-ground and underground storage tanks historically located on the northern parcel adjacent to the roundhouse. Petroleum contamination consistent with No. 6 fuel oil, diesel, and heavy oil from that historical tankage was discovered in February 2016 during construction of a new sawmill. Remediation to date has included removal of 74 tons of contaminated soil, historical tank removals, pumping of a vault exhibiting oil sheen, covering a contaminated area with rock, and constructing a berm from scraped material. The site remains classified as Awaiting Cleanup under the Standard Cleanup program. 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.
The contamination at this property — No. 6 fuel oil and associated heavy petroleum products — originated from fuel storage infrastructure that, by the site's own records, predates the contamination's 2016 discovery by a substantial margin, placing its origin squarely in the era when occurrence-based Commercial General Liability policies carried no effective pollution exclusion. Operators and property owners holding pre-1986 CGL coverage during the period that historical tankage was in active use may retain enforceable claims against those historical carriers today. The cleanup costs still ahead — active remediation of the remaining petroleum-impacted areas — represent expenditures that such policies 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
Ready to learn more?
Contact UsThis analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.


