|Charles Maginley, The ships of Canada's Marine Services, Vanwell Publishing 2003|
The Grenville was built by the Polson Iron Works in Toronto in 1915 and served as a lighthouse supply and buoy tender for fifty years. In December 1968 the Grenville was pulling buoys in the St. Lawrence River when she got caught in the ice and was pushed broadside against the fixed span of the St Louis bridge. The current dragged her over and she sank on the spot. The crew managed to climb onto the abutments and were saved.