Not sure if it was Troll so don't quote me but before starting operations on one of these monsters of engineering, the lead on the project, who was a music buff, said its tragic to fill the concrete jacket without appreciating the acoustics so held a concert inside for the workers. It had already been installed so the concert was carried out below sea level. One never knows in the industry if the stories told are really true and doubt that would've been public but from a just kinda cool appreciation, I like to believe it was
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Absolutely correct 💯.
I appreciate your message 🙏
Here is some information on that:
'Although Troll is primarily a gas field, it also holds vast quantities of oil. Output for 2008 from the entire field is about 138,000 barrels of oil per day and 120Mmscm/d (Million Metric Standard Cubic Meter Per Day) of gas are extracted through three platforms. Singer Katie Melua and her band performed the deepest concert ever, singing at 100 meters below sea level on Troll A, in 2006.'