  We present and make publicly available the third data release (DR3) of the
Keck Observatory Database of Ionized Absorption toward Quasars (KODIAQ) survey.
KODIAQ DR3 consists of a fully-reduced sample of 727 quasars at 0.1 < z < 6.4
observed with ESI at moderate resolution (4000 < R < 10000). DR3 contains 872
spectra available in flux calibrated form, representing a sum total exposure
time of approximately 2.8 megaseconds. These co-added spectra arise from a
total of 2753 individual exposures of quasars taken from the Keck Observatory
Archive (KOA) in raw form and uniformly processed using a data reduction
package made available through the XIDL distribution. DR3 is publicly available
to the community, housed as a higher level science product at the KOA and in
the igmspec database.
