||A S.L.S.A. tablet set horizontally in the north wall of the electrical maintenance building at Maple Leaf Mills in Port Colborne. The tablet is set in the first concrete pillar 2.4m from the northwest corner, 37 cm above ground, 14.7 m from the southwest corner of the office building and 8 m from the northwest corner of the pump house. Horizontal Position updated to NAD83CSRS in January 2010.
Horizontal position updated September 2018 based on description and Google Earth. Previous position: N 42.873056, W 79.251111.