8 9 



is swift, being probably about 8 miles (13 km.) 

 per hour. 



From Rink rapids to Selkirk, the Lewes is 

 remarkably straight and follows a general 

 course of about S 50 W, the current averaging 

 about \]/2 miles (7 km.) per hour. This stretch 

 of the river, more so than most portions 

 of the stream above, contains a large number 

 of islands which are somewhat conspicuous 

 in that they characteristically occupy posi- 

 tions in midstream. The valley is generally 

 wide, and the hills bounding it seldom exceed 

 1,000 feet (300m.) in elevation above the river. 

 Terraces are prominent, and in most places are 

 from 100 to 200 feet (30 to 60 m.) above the 

 stream. 



An exposure of boulder clay occurs a short 

 distance below Rink rapids, and is the most 

 northerly occurrence of this material noted 

 on the Lewes. This point is probably near 

 the limit of glaciation in the Lewes River valley. 

 Glacial striae several hundred feet above the river 

 were noted along Nordenskiold river near 

 Carmack, but are not known to have been seen 

 farther down the Lewes. 



Rock exposures are infrequent along the 

 portion of the river between Rink rapids and 

 Selkirk. In a few places the slopes of the hills 

 run down to the waters' edge, and it is generally 

 only at such points that rock outcrops occur. 

 Jura-Cretaceous sediments, however, appear 

 to continue downstream on the right limit of 

 the river to below Yukon Crossing. 



347 m. Yukon Crossing — Altitude 1,597 ft. (485m.) 



555 km. Yukon Crossing is the point where the White- 

 horse-Dawson wagon road crosses Lewes river, 

 and is 144 miles (230 km.) from Whitehorse, 

 measured along the road. During the winter 

 months, stages carrying passengers and mail, 

 make regular trips between Whitehorse and 

 Dawson, crossing the river at Yukon Crossing 

 on the ice. During the season of open navi- 

 gation on the river, this road is little travelled, 

 and the river is crossed at Yukon Crossing by 

 means of a ferry. 



