Ezylman,
I am in the same situation with my upcoming pond. The Dam will be only 3ft at the most and I have level ground behind it. I have a few posibilities for mine. They may help you out.
1. An inline riser (Links below)
http://seabreeze-culvert.com/risers.htm
http://www.sepipe.net/html/products.html
http://www.agridrain.com/watercontrolproductsinline.asp
http://www.ponddampiping.com/asys1.html
2. Bottom draw riser (link below)
http://www.ext.vt.edu/pubs/fisheries/420-011/420-011.pdf

Dreaming of the pond!