Public Works cleanup site — Restorical Research
Snohomish Wastewater Treatment Lagoon
Hwy 9 & Riverview Rd SE, Snohomish, Snohomish County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a public works and maintenance facility predating 1986. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This approximately one-acre lagoon is located on the City of Snohomish wastewater treatment plant property and was constructed in 1995–1996 using biosolids and soils excavated during construction of the current WWTP — materials that carried contamination from prior municipal operations. Cleanup under the Voluntary Cleanup Program included removal of stockpiled street sweeping and vactor waste, construction of an engineered containment cap in September 2008, installation of a gas venting system, dike armoring with a follow-up repair in 2010, and stormwater control improvements, at an estimated total cost of $738,759. Active obligations continue: an operations and maintenance program for the cap, long-term groundwater monitoring, and an environmental covenant encumbering the property. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Public Works
AddressHwy 9 & Riverview Rd SE, Snohomish, Snohomish County
Historical UsePublic Works
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsContaminated biosolids, vactor waste, and municipal soils from historical wastewater treatment operations
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #3530

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 here is traceable to the City of Snohomish's municipal wastewater treatment operations — a publicly owned treatment works the City utilities department ran for decades before 1986, generating the biosolids and contaminated soils later deposited in this lagoon. Occurrence-based CGL policies issued to the City during those pre-1986 WWTP operations were written without the pollution exclusions that became standard after 1986, and the documented costs of this cleanup — engineered cap construction, gas venting, dike armoring, and a continuing O&M and monitoring program — arose directly from that historical municipal operation. Historical carriers who covered the City's utilities department during that pre-1986 period may remain obligated to fund both past remediation expenditures and ongoing closure costs.

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.