Landfill cleanup site — Restorical Research
Winnebago Cnty Snell Rd LF
Oshkosh, Winnebago County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a landfill going back to 1968. Historical insurance policies issued during those prior operations and through 1986 could help fund the multi-phase investigation and remediation work ahead under Wisconsin DNR oversight.

This property operated as a landfill from 1968 through 1989, accepting waste that included chlorinated solvents such as tetrachloroethylene (PCE), trichloroethylene (TCE), and vinyl chloride. Groundwater contamination was first identified in the early 1990s, and a vinyl chloride plume has since migrated westward beyond the landfill boundary, reaching private drinking water wells in the surrounding area. A groundwater extraction and treatment system operated from 1998 to 2016, and a supplemental site investigation submitted in late 2024 was not approved by Wisconsin DNR, prompting an additional investigation workplan in early 2026. That history could support an insurance coverage claim against the carriers who issued policies more than 40 years ago — coverage that could help fund the cleanup ahead.

Former Use
Former Landfill
LocationOshkosh, Winnebago County
Historical UseLandfill
Est. Operating Since1968
DNR ProgramEnvironmental Remediation Program
Contamination & Investigation
Site Assessment Summary
ContaminantsChlorinated solvents (tetrachloroethylene, trichloroethylene, vinyl chloride) in groundwater
Regulatory ProgramWisconsin DNR — NR 700
BRRTS #02-71-592755

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 Wisconsin — and those policies may provide coverage that remains enforceable today. 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.

Landfill operations at this property ran from 1968 through 1989, with chlorinated solvents — including tetrachloroethylene, trichloroethylene, and vinyl chloride — being disposed of throughout the eighteen years of activity that preceded 1986. With a vinyl chloride plume continuing to migrate offsite into private drinking water wells, Wisconsin DNR requiring additional investigation beyond the supplemental study submitted in late 2024, and further remediation and long-term groundwater monitoring still needed to achieve regulatory closure, the future costs of that remaining work represent obligations that the pre-1986 carriers of the businesses that operated here may be required 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

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 viable insurance coverage exists to fund the cleanup, 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.