average depth is 4,900 ft - almost a mile. LOL
There’s no plan to drain it empty which has happened at least once in earths geological past. Lowering the Med 200 meters would creat massive hydraulic head for hydro power consumption. And would put massive amounts of the shallows above water thousands of sq kms. The influx of fresh water vs evaporation is such that without the waters flowing in via Gibraltar and rhe Suez the Med would drop by meters per year. In a few decades it would hundreds of meters down and ripen for hydro electric. Use the hydro power for desalination plants and green up those thousands of sqkm of new land which would be very fertile ask the Dutch how fertile former seafloor is their best farmland is all former northsea bottom.
Look at the map at the top of this page.
https://en.m.wikipedia.org/wiki/Atlantropa
Humans more than have the technology to dam the black off and Gibraltar as well. The suez is a baby ditch compared to either locks would be needed for cargo ships but 200 meters of locks is not a impossible challenge eight 25 meter steps would work. Each one with hydro turbines on the outflows.
The Israelis have a idea to tunnel from the Med to the dead sea and use the drop to run turbines for desal and electricity while stabilizing the falling dead sea levels once and for all.
Oh man, that's going to create a hot spot that will rival Death Valley, but exceed the humidity of Houston in August.