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[Heclapar]

So i know how to make floodgates,i know how to seal an area off from the other parts of the fort, and i know how to get to the water.What i dont know is how to build the floodgate.If i dig to the water,it will flood everything before i have the chance to build the floodgate.If i build it before that and get a miner to dig the last block, he will drown.So how do i do it if the water doesnt freeze in winter 

[MonkeyHead]

Leave one block unmined between your chamber and the water source. Set up floodgates (reccomned a double gate fr reasons of safety, and also placing the levers far away from anywhere likley to get flooded), then channel away the last tile from above. This does leave a route into your fort for awkward building destroyers who dont need to breathe, so you might want to add a fortification in the water flow channel, as unlike grates or bars they can not yet be destroyed.

[Garath]

I'd recommend a raising bridge exactly for those security reasons as it usually doesn't get destroyed. Also, if you dig the last tile from the tunnel, you can just let the dwarf walk or be swept past your flow-stopper, close it and retrieve dwarf. Don't forget that anything with water also needs a way to drain the whole system in case of repairs or if something gets stuck in there

[Heclapar]

Thanks guys,works perfectly (and no one drowned in the construction)

[SpiralDimentia]

(and no one drowned in the construction)

Sounds to m like you might've messed up somewhere along the line..

[slothen]

If you don't want to mess with pumps, I highly recommend using gravity to get water in and out fast.  For draining, you can use fortifications to protect hatch covers from building destroyers.

[weenog]

If you don't want to mess with pumps, I highly recommend using gravity to get water in and out fast.  For draining, you can use fortifications to protect hatch covers from building destroyers.

Can't swimmers still cross fortifications with 7/7 water on them?  Probably safer to use drawbridges.

[slothen]

If you don't want to mess with pumps, I highly recommend using gravity to get water in and out fast.  For draining, you can use fortifications to protect hatch covers from building destroyers.

Can't swimmers still cross fortifications with 7/7 water on them?  Probably safer to use drawbridges.

perhaps, but there are very few aquatic creatures with building destroyer 2, its rarely an issue with goblins.

[weenog]

It only takes one titan or forgotten beast getting into the heart of the fortress.

[slothen]

It only takes one titan or forgotten beast getting into the heart of the fortress.

True, but that's what your military is for, and they won't swim through your fortifications if you don't try to drown them.  Plus, on the offchance that you do get that crazy, extract-spitting, flying aquatic buildingdestroyer megabeast, wouldn't you WANT your fortress to have a slight security flaw for them to exploit?