A Russian kimberlite pipe, mined for diamond. 1720 feet deep and 3900 feet across. Closed April 30, 2004. Filling with some real toxic water, similar to the mine in Butte, Montana. Interesting to look at on Google Earth too.
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A Russian kimberlite pipe, mined for diamond. 1720 feet deep and 3900 feet across. Closed April 30, 2004. Filling with some real toxic water, similar to the mine in Butte, Montana. Interesting to look at on Google Earth too.