Can't build Wharf underwater

[Deantwo]

It seems to be impossible to build a Wharf underwater. Error simply says it has to be at a coastline, which was not a requirement in old-style. This prevents me from making sea trade connections with other cities on the world.

Same seem to apply to Military Dock.

[Deantwo]

Also an issue with Treatment Plant, which makes it harder to get hydrosphere resources.

Maybe being allowed to harvest hydrosphere resources from the environment when built on a sea platform would be nice too.

[Deantwo]

I assume this is also an issue for Shipyard, but since no one has designed an underwater Shipyard building blueprint it is hard to say for sure.

[Nightwalker]

Build the part of the structure that's supposed to be on land under a bio dome, and then it works just fine. Regular shipyards can be built this way too.