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Stabilization of Disposal Structures at Risk of Failure

Update: This comment period has been extended until June 29, 2020

A 2019 report identified three underground liquid waste disposal structures – 216-Z-2 Crib, 241-Z-361 Settling Tank and 216-Z-9 Crib – to be at risk of age-related failure. To prevent the potential spread of contamination, the Department of Energy and contractor CH2M Hill Plateau Remediation Company are preparing to stabilize the structures by filling them with engineered grout. The grout will provide near-term protection of human health and the environment against potential collapse and release of contamination, while not precluding future remedial or closure actions. Planning for the stabilization work is underway, including design, regulatory documentation and a subcontracting approach for materials and services. Fieldwork preparations will begin in the coming months, with grouting of the two smallest structures planned to start this summer. Grouting of the larger structure (216-Z-9 Crib) is anticipated to be completed within a year. The stabilization work is planned to be done as a Time Critical Removal Action under the Comprehensive Environmental Response, Compensation and Liability Act.


This website will be updated as more information is available.

Last Updated 05/01/2022 4:14 PM