Remember ... this is only year #1
and no spawning has yet taken place. The fish will grow fast, the first year or two, then start spawning .... THAT'S when the size of the pond will come into play. By 2009, you're going to start having to remove a lot of < 8" fish from the pond ... or it WILL overpopulate, and your "slabs" will be no more, just a pond full of dinks.
Did you put in any other predator fish, to help you keep the pond's Crappie population under control ?? If so, you might extend the life of your Crappie pond, by a few more years (the life span of whatever predator species you used, so long as they survive).
Thanks for the update ... luck2ya ... cp