Take a look at this. I know guys who worked here. Looks like they are cracking on with it.
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The project includes the creation of 28 caverns at a depth of 600m in three phases between 2013 and 2018. The first ten caverns of the first phase are expected to be commissioned in 2013. The facility is expected to be fully operational by 2018.
I nearly took a trip there myself as I needed some videos taken of the operation.
http://www.hydrocarbons-technology.c...orage-project/