From a letter from Congresswoman Gwen Moore (D-Wis) to Social Security's Acting Inspector General (although, for the same reason that there's no Acting Commissioner of Social Security I think there's no Acting Inspector General):
I am writing regarding the anticipated closing of the “Mitchell St.” Social Security Administration (SSA) Field Office at 1710 S. 7th St. Ste. 200, Milwaukee, WI 53204.
My office was first notified that the Mitchell St. Field Office would be closing on January 9, 2018. It was explained to my staff that the current office location had numerous health and safety concerns which necessitated closing the office....
As noted in SSA policies and procedures for closing and consolidating field offices, “At least 180 days prior to the proposed consolidation date, we will notify the public about any field office consolidation proposal and include a 30 day comment period.” As stated above my office was first notified on January 9, 2018, less than two months prior to the anticipated consolidation. Based on information received from SSA and the General Services Administration (GSA), SSA began the process of looking for an alternative site in late 2015; over two years ago. Per the above requirements, SSA had both the ability and the opportunity to notify my office and the public at large of its anticipated actions. ...