The permanent, fishless, sediment ponds of Fort Indiantown Gap (FIG), a National Guard training facility in Dauphin and Lebanon counties Pennsylvania, support a diverse array of odonates. Thirty-eight different dragonfly species (Odonata: Anisoptera) were found at six permanent ponds on the FIG training grounds, including Anax longipes (Comet Darner) and Lanthus parvulus (Northern Pygmy Clubtail), two species listed by the Pennsylvania Natural Heritage Program (www.dcnr.state.pa.us) as state imperiled (S2) and state vulnerable (S3), respectively. Military installations are often large, difficult to access parcels of land that can inadvertently serve as wildlife preserves. A Pollard-walk style relative-abundance survey was conducted weekly from May through August of 2005 to examine population trends of Libellula cyanea (Spangled Skimmer), Libellula pulchella (Twelve-spotted Skimmer), Plathemis lydia (Common Whitetail), and Celithemis elisa (Calico Pennant). In addition, a mark-recapture survey was used to determine population size estimates and dispersal for these four common species. Size was recorded to determine if size is correlated to dispersal.