The Dumont is getting this (small) underground parking garage as part of it's new addition in order to compensate for the fact that the Moncton Hospital has a similar underground parking facility as part of the ACC expansion which was built several years ago.
Meanwhile, a plan to have a (much larger) enclosed parking garage behind the new oncology clinic at the Moncton Hospital was politically thwarted, even though it would have been part of a privately funded expansion of the Professional Arts Building attached to the hospital.
Such is the pettiness of medical politics between the two hospitals in Moncton.