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« on: April 16, 2011, 01:02:06 pm »
Want a waterfall entrance? There's a couple of options.
Option 1 is a created waterfall. You've no need for that, but I'll explain it quickly. Build a pump stack, two or three levels tall. Connect to a Water Reactor BELOW. (Unless you're using an Aquifer, but that's an entirely different type of entrance.) Water will be pumped on activation, flooding water into and over your entrance. Simply close it up with hatches, and let it flush itself naturally back into the river.
Option 2 is a natural waterfall. You'll need some pumps again, and probably dwarf power. Best way to work it is with enough pumps to temporarily shut down the river. Now build two bridges. One at the level of the entrance, hanging out to a constructed floor. The second should be one level above and long enough to cover the entire lower bridge. Bottom one should be raising, top retracting.
Now connect both to the same lever. And turn off the pumps. You should be able to get beneath the fall going over the lower bridge. If not, widen the upper bridge. Best not to remove the pumps until you're sure that works.
