There may be a set of plans on file at City of Detroit, Dept. of Building Engineering [[or whatever name this area goes under today) which used to be located in the Cadillac Tower. Another source might be Ford Mtr archives or one of the associated sources at Henry Ford Museum/Greenfield Village. I doubt the Detroit Symphony would have anything, as their association ended over two decades ago. Another source might be the Civic Center offices. Also I would imagine the demolition company that the city contracts with would be provided with plans...keep in mind the garage is not being demolished. My best theory is the City offices. Good luck...
and thanks for the "thanks" regarding previous postings.
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