Industrial & Manufacturing cleanup site — Restorical Research
Cobra Construction Co.
3400 Hwy 99, Marysville, Snohomish County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility going back to 1960. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property was first developed in the late 1960s as an industrial construction yard for storing and maintaining heavy trucks and equipment, with tenants including Granite Construction and MP Environmental conducting fleet fueling and large-equipment repairs on site. Historical heavy-truck and equipment maintenance activities resulted in diesel-range organics (DRO), oil-range organics (ORO), and carcinogenic polycyclic aromatic hydrocarbons (cPAH) contamination in shallow soils across five distinct areas of the property. Between October 2024 and July 2025, multiple interim remedial excavations removed 377.50 tons of contaminated soil under the Voluntary Cleanup Program, with groundwater monitoring ongoing to characterize site conditions. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address3400 Hwy 99, Marysville, Snohomish County
Historical UseIndustrial & Manufacturing
Est. Operating Since1960
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsDiesel-range organics (DRO), oil-range organics (ORO), and carcinogenic polycyclic aromatic hydrocarbons (cPAH) detected in shallow soils
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #17366

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 Marysville industrial yard traces directly to fueling and equipment-maintenance operations that began in the late 1960s — roughly two decades before 1986, when occurrence-based CGL policies still provided meaningful pollution coverage. The documented remediation costs here — five separate excavation areas, nearly 380 tons of impacted soil removed, and an active multi-year monitoring program — represent exactly the kind of expenditures that historical carriers whose policies were in force during the pre-1986 operational window 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.