The second round of installations was completed for the Yucca Mountain Expansion project for the California Institute of Technology and Harvard-Smithsonian. The project, funded by the U.S. Department of Energy, is part of the Yucca Mountain feasibility study. GPS data will be used to determine crustal stability of this region, which will be used for nuclear waste storage. Five sites were installed within Area 25, where Yucca Mountain is located, with an additional two sites installed nearby in California.

A UNAVCO field engineer worked with members of the Caltech and Harvard-Smithsonian teams to establish the sites on previously installed monuments. Each GPS site includes a Trimble NetRS receiver and a Trimble chokering antenna, and either an Intuicom wireless Ethernet bridge radio or a Proxicast CDMA modem for communications. Data are monitored and processed at Harvard-Smithsonian.

The network will be completed by an additional three sites, which are planned for Death Valley.