Glad I called Keith! He said the Valterra knife gate at 15 feet deep would probably fail in my pond and recommended the 8” DS shear gate. The barrel will be reduced from 10” to 8” at the shear gate I’m not really concerned about the gate rusting shut that is epoxy coated because the pond is surrounded by woods and will be opened a few times a year to reduce the amount of accumulating debris. Next I want to fabricate a triangular guard from cattle panels to keep larger stuff from clogging when I draw down the pond. I hope this information helps!
Heppy