The PBO mission is to site, recon, permit, install, and maintain 875 Global Positioning System (GPS), 103 Borehole Strainmeters (BSM), and 5 Laser Strainmeters (LSM) on-schedule, on-budget, and to specification within 5 years. Taken together, these instrument types span the broad temporal and spatial spectrum of plate boundary deformation anticipated in the project area.