Does the domes steel mesh ground out electrical line waves?
Yes. The entire dome except for the widows and nonmetalic doors is completely wrapped with steel. The steel mesh that is in the concrete has one inch square openings. That steel mesh would block or ground electromagnetic radiation with the exception of high frequency in the order of what cell phones use. Radio and TV will possibly be blocked and the 60 cycle of power lines being very low frequency would definitely be grounded.