One of Elfordstown on web archive:
Elfordstown, Ireland's largest earth station, entered service in 1984 and carries telecommunications traffic to Europe and North America. There are 3 antennae in the Earth station complex. The largest, a 32 meter Intelsat Standard A, carries the North American, Canadian and Saudi Arabian traffic. European destinations use the 11 meter antenna in Eutelsat TDMA system. The third antenna, a 13.5 meter Intelsat Standard B, is used for PTAT cable restoration.
Finally there's a mention of Mt Gabriel, Schull on the Wiki entry on Echelon
Any more info on this?