The link was not working so I contacted Mr. Wilson. Here is the correct link:
Report by Dr. Wilson Blake Link has be changed to http://www.michigan.gov/documents/deq/WBlakeReport_201259_7.pdf
Kennecott Eagle Project
The following report has been added to the Kennecott Eagle Project web page.
Report by Dr. Wilson Blake titled "Review of the Evaluation of Crown Pillar Stability for the Proposed Eagle Mine." This is a review of the data and conclusions about mine safety and stability of the proposed Kennecott Eagle Project that have been made by Dr. David Sainsbury for Itasca Consulting Group Inc. and Golder Associates Ltd.
EXECUTIVE SUMMARY - from the report:
Kennecott Eagle Minerals has
submitted a Mining Permit Application for their Eagle Project in the
This led to a modification in the mining plan that would not let the mining elevation exceed a mine elevation that left a substantial and stable crown pillar. Apparently there were still some concerns about the stability of the crown pillar, which has caused this review to be carried out.
The concern with respect to crown pillar stability for the mining plan presented in the 2006 Mining Permit Application for the Eagle Project of Kennecott Minerals was warranted. The initial geotechnical work did not establish a stable crown pillar, and there was insufficient geotechnical and hydrological data available to determine the subsidence and hydrological response due to mining.
Subsequent geotechnical work has resulted in establishing an upper mining elevation limit that will allow for mining to be carried out below and not have any effect on the surface. The Mining Permit Application for the Eagle Project has been modified to incorporate this upper mining limit (Phase 3). Additional geotechnical data collection will take place during mining and a Phase 3 crown pillar study will be carried out. The Itasca Consulting Group has endorsed the revised Mining Permit Application.
I concur with
Hence, I recommend that the Mining Application Permit for the Eagle Project be approved.
Steven E. Wilson
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The DEQ OGS Kennecott
Eagle Mine page at
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