I used another websitr to have a look at 129 in the center of Vermont. The elevation would be 15 degrees above the horizon.
The pointer indicated an obstuction 164 feet away could be no taller than 43 feet.
Point taken. I do plan to mess around with an extra dish I have to see if I can get 129 from my side yard. That won't prove anything about Vermont since they are further east than I, but it's something I wanted to try anyway.