Scott,
Not sure who's question you were answering, but the standpipe at stately Lusk manor will likely never see ice, unless I pour a cold drink over it. One year out of 5, we might get several consecutive days where temps don't rise above freezing...but those times are rare and ice will be no thicker than 2 inches, for a short time.
The standpipe serves as primary spillway, to take care of excess rains...that's it. And, it will act as a bottom water release, after we cut it, turn it up, and put a larger pipe over it, venturi style.

Teach a man to grow fish...
He can teach to catch fish...