Guys, I think you are playing with fire talkling about a conventional spillway which I believe to be a emergency spillway.
I know Freetstone County soils like the back of my hand as well as East Texas soils.
I have experienced a flash flood on our Freestone County property that washed out a 5 acre neighbor's upstream pond with a conventional spillway. It did considerable erosional damage to our bottomm pasture

Mry son’s property in Delta County has the same soil type and his pond builder installed a spillway siphon system as well as emergency spillway.
I strongly recommend this type system based on my experience,
George

https://www.google.com/search?q=pond+sip...mp;ved=0CEUQsAQ

http://ponddampiping.com/syphon1.html

Last edited by george1; 12/01/14 05:35 PM.

N.E. Texas 2 acre and 1/4 acre ponds
Original george #173 (22 June 2002)