| Energy to Store Project Solution Mining Water Aquifer Water Monitoring Prairie Evaporite Brine Disposal Storage Fields Project Documents | Solution Mining TransGas’ storage caverns are created by solution mining. This is a process in which a conventional well (such as those typically found in the oil industry) is drilled and completed to salt deposits located approximately 1,100 meters beneath the surface. The Saskatoon area has one of the best geological structures for the creation of underground natural gas storage. This structure is known as the Prairie Evaporite.
Once the well has been completed, non-potable water is injected into the salt bed in a controlled manner to dissolve salt and create a cavern approximately the size of a 12-storey office building. The resulting brine, which is a mixture of dissolved salt and water, is then pumped back to the surface for disposal into another suitable formation even deeper underground. 
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