If you already have trees on your dam that are over 4 inches or so if you remove them you may risk it dying off and creating a leak if you don't get the roots and all! Larger trees you better just leave alone at this point unless you want to re-work your entire dam! I would leave them alone unless they are under 4 inches in diameter. That's just me.
RC
Last edited by RC51; 05/16/13 12:22 PM.