Industrial & Manufacturing cleanup site — Restorical Research
Coleman Creosoting Works
333 Elliott Ave W, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility going back to 1893. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

The Coleman Creosoting Works occupied this property from approximately 1893 to 1912, using it to produce and store creosote in an industrial manufacturing operation. Cleanup has included excavation and removal of contaminated source soils and installation of an active groundwater pumping and treatment system discharging to the municipal sewer; a Consent Decree governing the remediation was established in 2003. Long-term groundwater compliance monitoring has been in place since at least 2002 and was still ongoing as of 2019, with land use restrictions remaining in effect to prevent exposure to residual contamination and limit groundwater use. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address333 Elliott Ave W, Seattle, King County
Historical UseIndustrial & Manufacturing
Est. Operating Since1893
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsNaphthalenes and polycyclic aromatic hydrocarbons (PAHs) from historic creosote production detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #1841

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 naphthalene and polycyclic aromatic hydrocarbon contamination at this site is directly linked to creosote production and storage operations that concluded roughly three-quarters of a century before 1986 — the period when occurrence-based Commercial General Liability policies carried no effective pollution exclusion in Washington. That multi-decade gap between the contamination's origin and the modern cleanup obligation is exactly the scenario those historical policies were written to address. The documented remediation costs here — source-soil excavation, an active groundwater treatment system, and more than two decades of compliance monitoring under a Consent Decree — represent expenditures the historical carriers who issued CGL policies during the creosoting era may be obligated both to recover and to fund going forward.

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.