PN No. 6 field acreage became part of PN No.4 when the farmstead buildings were demolished to make room for the WILL AM/FM/TV transmitter tower and equipment building in 1966.
In 1966, the farmstead buildings on PN No. 6 field acreage were demolished to accommodate the construction of the WILL AM/FM/TV transmitter tower and equipment building, which then became part of PN No. 4.