The mapping algorithm for the 2013–2014 winter was used to derive the ice cover for the winter 2014–2015 from RADARSAT-2 imagery (FOW3 beam mode). Similar to the 2013–2014 winter, thermal ice was of the dominant ice cover type from Big Eddy to Great Slave Lake during the 2014–2015 winter (Figure 17). The dominance of thermal ice in the downstream portion of the river in the 2014–2015 winter was confirmed by our field survey in late January and early February 2015 from Big Eddy to the Steamboat Channel. All drilled ice holes, using an auger, showed the dominance of thermal ice type along the river sections from Big Eddy to the Steamboat Channel (Figure 18).