This property has a documented history as a industrial and manufacturing facility going back to 1958. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.
Weyerhaeuser's Chlor-Alkali Plant in Longview operated from 1958, producing chlorine and caustic soda using the mercury electrolytic cell process; the plant was expanded in 1966 and mercury-cell operations continued until 1976. Remediation began as early as 1972 and ran through 1992, encompassing extensive soil and concrete excavation that removed over 55,000 tons of material and 61 drums, and recovered 1,500 pounds of elemental mercury. Subsequent and ongoing measures include asphalt caps to limit infiltration, groundwater monitoring in place since the 1970s, a restrictive covenant limiting the site to industrial use, and site access controls, with Weyerhaeuser bearing continuing regulatory oversight costs. 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.
All contamination at this site is attributed to mercury electrolytic cell operations that ran from 1958 through 1976 — entirely within the period when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion in Washington. The remediation record here is among the most extensive in the state: decades of excavation, more than 55,000 tons of impacted material removed, 1,500 pounds of elemental mercury recovered, and groundwater monitoring now entering its fifth decade. Historical CGL carriers whose policies covered Weyerhaeuser's Longview plant during those pre-1976 operations may still be obligated to recover past expenditures and fund the long-term maintenance obligations that remain.
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.


