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Posts on ‘October 15th, 2011’

Shell set to plug leak that created pond at oilsands mine

Never-seen-before problem shows importance of additional seismic work in areas earmarked for mining

By Dave Cooper, edmontonjournal.com October 14, 2011

The flooded pit at Shell’s Muskeg River mine now holds about seven million cubic metres of salty water after a deep crack formed in the rock below the mined-out area last year, allowing water from a deep aquifer to flow upwards. It was the first time an oilsands firm has faced such a situation. Shell is building a drilling pad in the pond and will inject hot asphalt and then cement into the crack to permanently seal the leak next year. Photograph by: Shell Canada, edmontonjournal.com

EDMONTON – When water started appearing at the bottom of a Muskeg River mine pit north of Fort McMurray last October, crews assumed it was normal seepage from surrounding rock. read more

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