Thanks for you responses! I actually went with a slightly larger discharge pipe that we had before. It was either 12 or 14" before but it was actually hard to tell because of how rusted out and twisted it was. The emergency spillway was never used unless this main pipe was clogged.
Do the anti-vortex plates aid significantly in discharge volumes?
Appreciate the info!
Good deal on your larger pipe!
With a plate and trash rack your pond (and dam) should be safe and secure.
(Maybe inspect your emergency spillway next spring.)
