This is the stereophonic counterpart to the transmission system structure A52-E for determining the physical origin of the telluric signals. The distance between structures is approximately 200 miles.
The major effort was digging guy a guy anchor hole five feet deep in the rock to replace a dead end guy on a telephone cable facility. Also, the effort was made to gather up approximately five miles of abandoned open mile line to use in constructing the new transmission structures. Much more is still needed and no availability has been found yet.