RC - As Bob points out be sure about the strength of the dam. High water and heavy runoff can put tremendous pressure on the dam's inward face. Maybe someone can find for you the post were a reader's new pond dam in the NY area recently washed out. Hopefully you can see results of substandard dam construction.

As for a small pond, see this link for what can be raised in a small 0.12 ac pond (59'x88'). There are some pretty smart fish raising people here.

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=20;t=002293;p=1#000005


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management