David R, if you follow this forum on a regular basis you are aware that we are privileged to associate with some of the top fisheries folks in the country, but sometimes overwhelming with information they provide.
With apologies to Dr. Willis, ewest, BC and others too numerous to mention, I believe in keeping things simple as possible. (KISS).
You are located in Freestone County Texas and our ponds are in southern Delta County, some 200-mile to your Northeast.
I am very familiar with Freestone County, located in what is know as the Post Oak Savannah geographically, and the Wilcox Tertiary geologically.
Southern Delta County is located in the same zone and you have predominately sand, clay and sandy clay.
You will be spending money needlessly on pea gravel � you will have many excellent spawning beds as is.
It�s a rare day NOT to catch a 10 inch,, 1 lb BG on our pond � it�s not a matter of gravel or sand � it�s water quality, genetics and a good feeding program.
We normally will have a balanced population of BG ranging from 1 inch to 10 inches.
Good luck,
George Glazener