We present a study of the Galactic Center nonthermal filament system G359.54+0.18 located to the north of the Sgr C region. We find evidence in support of the suggestion by Serabyn & Morris that the nonthermal filaments are the manifestations of large-scale vertical magnetic field lines illuminated by collisions with molecular clouds. Included in the study are observations of, (1) the 3 mm emission lines of CS, HCO^+ and other molecular species with the SEST, (2) several lines of ^12CO and ^13CO with the 3-m KOSMA antenna, (3) 5 GHz radio continuum emission with the VLA, and (4) H79alpha recombination line emission with the 100-m antenna at Effelsberg.