Klohn Crippen Berger

Thumbnail image of Skunk Camp Tailings Storage Facility, Response to Geo-Subsidence/Seismic Working Group Action Items #GS-2 and #GS-10, Related to Seismicity memo cover

This letter summarizes the seismic design basis, criteria and parameters for the Skunk Camp TSF and highlights key elements of a site-specific seismic hazard analysis.

Thumbnail image of Skunk Camp Tailings Storage Facility Filtered Tailings Analysis Conceptual Filtered Tailings Impoundment Layout and Staging memo cover

This technical letter presents two conceptual options for transitioning from conventional slurry deposition for Non-Potentially Acid Generating (NPAG) scavenger tailings (in early years) to filtered tailings (in later years) for the proposed Skunk Camp Site.

Thumbnail image of Assessment of Surface Faulting Investigations at the Skunk Camp TSF Location memo cover

This letter is in response to questions posed by BGC Engineering "Assessment of Surface Faulting Investigations at the Skunk Camp TSF Location".

Thumbnail image of Skunk Camp TSF Seepage Assessment report cover

Skunk Camp Tailings Storage Facility (TSF) Final Environmental Impact Statement (FEIS) seepage management plan and supporting assessment for input into the regional groundwater model.

Thumbnail image of Skunk Camp TSF Reclamation Plan report cover

The objective of this plan is to support the site-wide reclamation plan (Tetra Tech 2020) by providing the strategy and design for implementing closure measures for the Skunk Camp TSF.

Thumbnail image of Skunk Camp Tailings Storage Facility 'Dry' Slumping Extents report cover

Summary of the Skunk Camp Tailings Storage Facility hypothetical 'dry' slumping extent analysis.

Thumbnail image of Skunk Camp Tailings Storage Facility memo cover

The objective of this letter is to address WR-23 and describe and quantify (where possible) the embedded and adaptive contingencies incorporated into the Skunk Camp TSF design and to demonstrate the design robustness to the above uncertainties.

Thumbnail image of Skunk Camp Site Investigation report cover

This report summarizes the results of the geotechnical and hydrogeological site investigations undertaken in 2018 and 2019 to further the current understanding and/or confirm foundation and seepage conditions for the site.

Thumbnail image of Summary of DEIS Tailings Alternatives Seepage Control Levels document cover

Summary of tailings storage facility (TSF) alternatives seepage control levels (description, schematics and estimated seepage rates) and general comparison to estimated seepage rates for other existing typical TSFs in the region.

Thumbnail image of DEIS Design for Alternative 6 Skunk Camp, Appendix IV Seepage Estimate Amendment document cover

The seepage estimate appendix (Appendix IV from the Alternative 6 - Skunk Camp DEIS design report) has been amended with the results of the additional seepage control levels and is attached to this letter.

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Media Point of Contact

Amanda Oliver
amanda.oliver@usda.gov

Apache Leap Special Management Area
Apache Leap SMA website