@aLFredo - I can't imagine a scupper sculpture either as I had only known about, seen boat scuppers.
They are very simple designs, as described in the article the ones I have seen are circular with a vent for draining or a flap. Nothing worthy of a sculpture! But then again I didn't know scuppers were used for decorative purposes in swimming pulls either!
I didn't know there were more scuppers out there until my roof was replaced and they discussed my roof scuppers, they suggested I replace my old scuppers with new metal scuppers the next time I needed to replace my roof so that I would have better drainage.