Hi Henry,
Here are Don Pouliots' ice sculptures in his yard on Rte 109 in Jeffersonville. He estimates the tallest one to be 25 or 30 ft tall. His daughter, Emily is dwarfed by them.
Jo
(http://www.vtgrandpa.com/photos/albums/icestorm_080309/00423_G.sized.jpg)
(http://www.vtgrandpa.com/photos/albums/icestorm_080309/01215_G.sized.jpg)