Pond Boss Forums POND CONSTRUCTION Building a dam spillway ??

What I normally see is a water level device usually about mid-dam, this can be an elaborate deal with open and shut valves or just a big L-shaped pipe running from the surface to the bottom of the dam and out the other side (dumps right into the creek you described) while the spillways on the side are there for those gullywashers and once in a 100yr events. I have also noticed dams that have 1-2 or even three concrete culverts placed in the middle of the dam that can handle LOTS of water, but take precautions on the back side or erosion WILL be a problem.