LINE FROM BASE OF THE MOUNTAINS TO PUGET SOUND. 125 



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the river for bringing down lumber from above, no difficulty can be felt in supplying the portion 

 of the line on the bottom lands until the wooded lands are again entered near the Dalles. 



But little is yet known about the most suitable places for obtaining building-stone. Stone is 

 found in places along the whole line generally the trap or granite rocks. Probably the only 

 work for which stone will be required, other than such as shall be found near the place of con 

 struction, is the bridge across Columbia river, near Wallah- Wallah. Captain McClellan states 

 that &quot; good granite is found on the Columbia about 140 miles above the mouth of the Yakima ; 

 it may occur at a less distant point.&quot; Dr. Suckley observed good building-stone along the 

 whole line of the Columbia. 



Clean sand is noticed near the crossing of Columbia river, and on the bottom lands of Colum 

 bia and Cowlitz rivers, and will be obtained conveniently all along the line. 



The Spokane Plain, at a few points, is sparingly watered; but there will not be found any 

 difficulty in making suitable provision for water for the use of the road. For the balance of the 

 route this scarcity does not exist, and water is generally quite as abundant as is desirable. 



