The Drunken Lizard Pub

how do i open the gate under the dam?
tried the levers with "ogre strength" spell lvl 2
or is there another entry to "under the lake"?
thanks

I just run under the same problem - I was told that you should talk to Minus
[that old fellow who lives on the far west of the dam map, exterior] and then talk with the dwarf inside the dam again.

thanks, that did it