A new tower was installed here between June 2005 and October 2006 with a remote controlled camera at the top.
A second tower with a small service building was constructed next to the original tower likely in early 2020. By 10/2021 several microwave panel antennas were mounted to the tower. They are likely part of a new microwave intrusion detection system. A similar tower was built in late 2021 about a mile inside the Back Gate. The tower may also serve as a high speed data relay to Mt. Irish for the guard shack and for mobile units in the gate area.