The garage was constructed in several phases beginning in the 1950s and includes several vintages of cast-in-place concrete construction in its six supported levels and 800 stalls. Over the last four decades, THP has coordinated well over 30 restoration and modification projects for the garage, totaling over $15 million in present-day dollars. In the late 2010s, THP designed and administered a comprehensive $4.2 million restoration of the facility, intended to extend its service life.