Sea Levels and other water questions

[RogueSeraph257]

Do the sea levels ever stop rising? I'm getting sick of scrapping buildings and rebuilding them because the water keeps rising. And ports and shipyards. Why do they not work on Bays? I've got a good setup in sector 9 but they aren't fishing or building ships for that matter.

[Mordtziel]

Water will slow down substantially around 600m if you do nothing to increase it further. Otherwise, it will keep going until it reaches the cap (altitude 0).
As for your other question, sounds like a logistics problem? I've certainly had shipyards and docks work in very tiny areas before.

[domic]

Anything not flood-plains is safe forever. Flood plains will eventually ... flood. A big chunk of Sector 9 is low lying and ends up under water. The slope there is shallow so the water advances quickly.

I look for cliffs and hills to perch stuff on. Just after placing a building, click on it and check the building altitude. Altitude 0 is the eventual final sea level. It takes a long time to reach that, so you'll be safe as low as -1.5km for quite a while.