  We present a reconstruction of the mass distribution of galaxy cluster Abell
1689 at z = 0.18 using detected strong lensing features from deep HST/ACS
observations and extensive ground based spectroscopy. Earlier analyses have
reported up to 32 multiply imaged systems in this cluster, of which only 3 were
spectroscopically confirmed. In this work, we present a parametric strong
lensing mass reconstruction using 24 multiply imaged systems with newly
determined spectroscopic redshifts, which is a major step forward in building a
robust mass model. In turn, the new spectroscopic data allows a more secure
identification of multiply imaged systems. The resultant mass model enables us
to reliably predict the redshifts of additional multiply imaged systems for
which no spectra are currently available, and to use the location of these
systems to further constrain the mass model. In particular, we have detected 5
strong galaxy-galaxy lensing systems just outside the Einstein ring region,
further constraining the mass profile. Our strong lensing mass model is
consistent with that inferred from our large scale weak lensing analysis
derived using CFH12k wide field images. Thanks to a new method for reliably
selecting a well defined background lensed galaxy population, we resolve the
discrepancy found between the strong and weak lensing mass models reported in
earlier work. [ABRIDGED]
