Survey Of The Columbia River And Its Tributaries Vol 3 Classic Reprint

Excerpt from Survey of the Columbia River and Its Tributaries, Vol. 3 Many of the watersheds were completely logged off long ago and as a result stream flows are usually much smaller and water temperatures much higher than formerly during the summer and fall months. Therefore, the stream Spawning capacities are smaller than formerly. However, an extensive regrowth of timber and brush on the deforested slopes should result in some improvement of stream spawning conditions in the future. Practically all of the tributaries originally supported capacity runs of salmon, principally fall Chinook, silver and chum salmon. There were also good runs of steelhead and sea-run cutthroat trout. Despite the harmful effects resulting from logging operations, the encroachment of civilization, and a certain amount of overfishing, the streams still maintain a sufficient nucleus of fish and still have sufficient poten tial value to warrant their rehabilitation. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Survey of the Columbia River and Its Tributaries, Vol. 7: Area Vi., Snake River From Above the Grande Ronde River Through the Payette River Although it is impossible to conduct a biological survey of the Snake River through Hell's Canyon, it may be stated that this section is of no value to salmon because of the steep gradient and the bedrock composition of the river bed. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Survey of the Columbia River and Its Tributaries, Vol. 8: Area VII, Snake River, Above Payette River to Upper Salmon Falls Begins approximately 357 miles above the mouth of the Snake River and extends for a distance of approximately 216 miles upstream. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from River Surveys and Profiles Made During 1903 In order to determine the location Of the undeveloped water powers on the various rivers in the United States the United States Geological Survey has from time to time made surveys and profiles of the more important Of the rivers on which possible power sites were known to be located. The Object Of these surveys is to point out localities where power may be developed. In the determination Of the river profiles the general plan Of survey adopted was as follows: The elevations were based upon reliable heights derived from primary or precise levels Of the United States Geological Survey. On this datum, with few exceptions, lines of flying levels were car ried up the bank Of each stream and bench marks were established at intervals Of about 1 mile, usually on nails on tree roots. The elevations Of the surface Of the water at the head and foot Of each shoal, rapid, or fall were noted. These levels, with few exceptions, have been tied at both ends. In the case Of Broad River primary levels were used instead Of flying levels, and regulation bronze tab lets left at intervals Of 6 miles. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.