  We present results from Keck I high resolution spectroscopy of the radio loud
quasar PKS 0123+257 ($z_e$=2.364, V=17.5). In this object we detect Ly$\alpha$,
N V 1238,1242, Si IV 1393,1402, and C IV 1548,1550 in an absorption system at a
redshift of 2.369. The Ly$\alpha$ line has a square- bottomed profile
suggesting a high column density of gas, yet the line does not reach zero
intensity. The resolved C IV doublet ratio also clearly demonstrates that the
absorbing clouds at this redshift do not fully occult the background light
source along our line-of-sight.
  The absorption lines are positioned near the centers of the broad emission-
lines and the coverage fraction of the strongest absorption lines varies
inversely proportionally with the strength of the corresponding emission lines.
This implies that although the absorption-line region may obscure the continuum
source, it does not completely occult the broad emission-line region. This
effect suggests that the lines are formed close to the QSO central region. A
model is proposed in which the apparent coverage fraction derived for the
weaker absorption lines may vary with the column density of the lines.
  Broad absorption-lines (which are known to be intrinsic) are found nearly
exclusively in radio-quiet objects. Intrinsic narrow absorption lines have
previously been found in radio quiet QSOs; it is therefore significant that an
intrinsic absorption system has been verified in a radio loud quasar.
