WPGC's site was on Walker Mill Road, a little bit inside the Pennsylvania Avenue exit of the Capital Beltway. David, if you consulted an old Broadcasting Yearbook, you may be correct, but I remember WPGC-FM going from 15,700 watts to 50,000 in the early 70's. When that happened, they built a new tower for the FM several blocks away from its old perch on one of the 1580 towers. When the AM increased power from 10,000 to 50,000 watts, which required going from 2 to 4 towers, the AM moved a few blocks from the old site to Addison Road.