I lucky I dont have that problem. Mine is the beavers work very hard to stop up my over flow box. I always have about a foot of water comming out my pipe and a 4 foot box with a meatel grate on top of it. They put sticks and pack mud and moss to stop it up. I don't need any more lake. I have about 12 acres and off 831 and 1511. If you copy and paste you should be able to see it off terra sever.
http://terraserver-usa.com/usgsentry.aspx?T=1&S=11&Z=15&X=559&Y=8703&W=1&qs=%7cflo%7ctexas%7c
