North Western Outlet Lake Agassiz
The North Western Drainage Outlet of Glacial Lake Agassiz is around Fort McMurray in Alberta.
This is an overlay of a digital elevation model reflecting the topography at the time of drainage. information source:
The figure below shows the large proglacial lakes along the retreating Laurentide Ice Sheet at between 12'650 and 12'750 years before present. Source is article in Nature 464, 740-743 (1 April 2010): Identification of Younger Dryas outburst flood path from Lake Agassiz to the Arctic Ocean by Julian B. Murton, Mark D. Bateman, Scott R. Dallimore, James T. Teller and Zhirong Yang
Additional information: www.geostrategis.com/p_agassiz