For the summer, the doctor will be presenting these blueprints and doing all he can to have them executed.
Step 01 aFirst we are going to expand our embark level corridor until we find ourselves where we MUST be.
us -> Up Stairs designation
Step 01 bThen we will simply move up one level, dig some up/down stairs and
designate document where we will need to channel.
xs -> Up/Down Stairs designation
Red Block -> Channel designation
Step 01 cOnce more moving up one level, we should now be outside. Let's conclude our stairs with a triple downstairs designation, and channel these red squares from my blueprints
ds -> Down Stairs designation
blue us -> Up Stairs construction
blue W -> Wall Construction (use wood)
Red Block -> Channel designation
Step 01 dWe will also need to construct some supporting architecture yet another level up.
blue ds -> Down Stairs construction
blue f -> floor construction
blue W -> Wall Construction
Edit: Walls should not be built again, they are the top of the walls from the level below.Step 02Now that the first phase is done, and only now, we need to dig right over the aquifer at embark level.
(Note to self: "I hope that our miners will be smart enought _NOT_ to trap themselves in the middle, hah!")
Red Square -> channel
Action!
With this the setup is done.
We now need a brave dwarf to deconstruct the supporting architecture for the outmost ring.
The down stair should be removed first, followed by the up stair and finally the wall, which will trigger the cave-in.
There should be enought distance to prevent the test subject to be dragged along with the cave-in.
Actually it should be pretty safe, according to what I've read while sneaking in the restricted library in the mountain home.
After the first ring is down, channel the middle part of it, then on the level down, channel a single track to match the second ring, and repeact the process.
This plan is good enough for 3 layers of aquifer.
Let it be done!
Doc Valrandir