The Grand Trunk Fort Gratiot Car Shops, which were known locally as the Block I Shops.  They were located near the St. Clair River entrance to Lake Huron, where the Dunn Paper Company/Curtis Specialty Paper Plant is today.  These shops were destroyed by fire in 1913 and were replaced by the Port Huron Car Shops in 1918 that most of us know about today.  The latter shops were closed in 2001.  Two additional shots below are of the 1913 fire and the aftermath.  [Port Huron Museum Collection]