I believe you are correct... I must have misunderstood what I
thought I heard.
Regarding channel catfish, the Texas A&M AgriLife Extension service says, "They do not naturally spawn in ponds, so structures, such a milk crates, or buckets may be added to the pond bottom to encourage spawning."
Thanks!
Clayton
Clayton, I don't recall that presentation that said catfish would burrow in dam. I've read at least a dozen times that catfish won't spawn unless you add artificial cavities to your pond which "implies" they won't dig burrows while not outright stating it.