Public Works cleanup site — Restorical Research
WA DOT SR16 E & I5 S
Sr 16 E Under I5 S, Tacoma, Pierce County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a public works and maintenance facility going back to 1950. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup.

This WSDOT-owned highway interchange — where SR 16 passes under I-5 in Tacoma — has been in continuous operation since 1950, when SR 16 (then Primary State Highway 14) began serving as the link to the Tacoma Narrows Bridge. A tanker truck rollover accident at the interchange released petroleum products into the surrounding environment, with contaminated flow directed via a shoulder-side ditch toward a storm drain discharging into the Thea Foss Waterway. Petroleum contamination has been confirmed in both groundwater and surface water, and the site overlies the Central Pierce County Sole Source Aquifer with municipal production wells within two miles. The site is currently awaiting cleanup under Ecology's Standard Cleanup program. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Public Works
AddressSr 16 E Under I5 S, Tacoma, Pierce County
Historical UsePublic Works
Est. Operating Since1950
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum products (non-halogenated organics) detected in groundwater and surface water
Media ImpactedSoil, Groundwater, Surface Water, Air
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #3873

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.

This transportation corridor has operated continuously since the 1950s — more than three decades before 1986, when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion. The petroleum contamination now confirmed in groundwater and surface water above a sole-source aquifer will require remediation whose costs have yet to be incurred. Historical CGL policies issued to the facility's operators during that pre-1986 window may be obligated to fund the investigation, design, and cleanup work that lies ahead.

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.