Water-Supply Paper Volume 371-373

Water-Supply Paper Volume 371-373

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ... crossing of the Copper River & Northwestern Railway (see Pl. V, B), and Childs Glacier is just below on the opposite side. Large quantities of ice break from the face of these glaciers into the river during warm weather. Childs Glacier appears the more active of the two. Each presents a face of about 2 miles along the river's edge, in some places rising vertically more than 300 feet above the water's surface. Before the construction of the Copper River & Northwestern Railway from Cordova to Chitina and Kennicott small boats were used quite extensively on the Copper and some of its larger tributaries, and light-draft steamboats have navigated from the Tasnuna to Copper Center and from Chitina to the Nizina River on the Chitina. Since the railroad has been in operation little boating has been done on the Copper, and the construction of roads and trails and a fuller knowledge of the tributary areas has lessened the advantage of using the minor stream for boating. Copper River rises at an elevation of about 3,600 feet, making an average gradient of about 12 feet per mile. From Copper Center to the ocean there is a total fall of 1,000 feet, giving a mean fall in that distance of about 6.7 feet per mile. MINERAL RESOURCES. The principal mineral resources of the Copper River basin are copper and gold. The most important copper deposits are those of the Kotsina-ChitinaJ belt, extending along the southern slope of the Wrangell 1 Schroder, F. C, and Spencer, A. C, Geology and mineral resources of a portion of the Copper River district, Alaska: U. S. Geol. Survey special reports on Alaska, p. 27,1901. Described by Moffit, F. H., and Maddren, A. G., Mineral resources of the Kotslna-Chltina region, Alaska: U. S. Geol. Survey Bull. 374, pp....
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Product details

  • Paperback | 82 pages
  • 189 x 246 x 4mm | 163g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236745477
  • 9781236745477