Here's an excellent and highly informative (if only slightly outdated) Powerpoint presentation on DOD Geothermals. First, it's an excellent primer on Geothermal energy, which the author most often refers to as Ground Source Heat Pumps (GTHPs). And it goes into substantial detail outlining current and future deployments, cost factors and savings, building use types, etc. Highly recommended.
No mention of the EGS systems discussed in previous post on Geothermals, nor does it appear that energy security is a driver. More likely it's pure dollar savings and to show compliance with Green Fed initiatives published earlier like the National Energy Act of 2005 which sets facility energy savings targets.