Waterbound

[Annie Grieshop]

One thing (among many) that I've learned from this List is that y'all always
have good ideas and different perspectives.  So, here's my newest dilemma,
with which I'd appreciate your help.

The initial question is:  if I put a big ol' upright on a dolly, how long
can I leave it there safely?  Will it stress the piano (assuming it's not
afraid of heights)?

The reason...
When I bought this place, I was warned that I might see "some moisture" on
the shop floor in the spring.  Now that the shop is full of pianos and
tools, I know that "some moisture" actually means "enough to float a small
boat".  And here are the general conditions:
1)  there's no place else to go with the pianos, which include one grand,
the BOU, and four consoles
2)  water has already come through the foundation and up through the jointed
concrete slab floor
3)  the shop is currently surrounded by several feet of snow and ice
4)  I'm nervous about trying to seal the foundation/floor now, before I have
any idea what will happen -- I'd hate to crack or buckle something because I
tried to block water that I could redirect with drainage later
5)  I work and live alone

So, water's bound to come in.  And the question is:  how can I best protect
the instruments and still be able to get the water out of there?  I have two
dollies, but I'm also looking for more ideas.  Much as I hope none of y'all
has ever been faced with this kind of problem, I suspect at least a couple
of you have.  What did you do and how did it work out?

Thanks!

Annie Grieshop