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• 1. [Image] Big Redfish Lake Stream, Idaho

  	Citation × Citation Citation Abstract Copy Title: Big Redfish Lake Stream, Idaho Year: 1935 Title: Big Redfish Lake Stream, Idaho Year: 1935 Close

• 2. [Image] Big Redfish Lake Stream, Idaho

  	Citation × Citation Citation Abstract Copy Title: Big Redfish Lake Stream, Idaho Year: 1935 Title: Big Redfish Lake Stream, Idaho Year: 1935 Close

• 3. [Image] Boulders in stream

  	Citation × Citation Citation Abstract Copy Title: Boulders in stream Year: 1937 Title: Boulders in stream Year: 1937 Close

• 4. [Image] Woods Creek

  	Mouth of Woods Creek showing steep gradient and moss-covered boulders in stream bed. It is inaccessible at low water. Woods Creek is a tributary to the Cispus River
  	Citation × Citation Citation Abstract Copy Title: Woods Creek Year: 1941 Mouth of Woods Creek showing steep gradient and moss-covered boulders in stream bed. It is inaccessible at low water. Woods Creek is a tributary to the Cispus River Title: Woods Creek Year: 1941 Mouth of Woods Creek showing steep gradient and moss-covered boulders in stream bed. It is inaccessible at low water. Woods Creek is a tributary to the Cispus River Close

• 5. [Image] Stream bed above Lebanon

  	South Santiam River stream bed above Lebanon, Oregon Large rubble and bedrock were becoming dominant;1940-08-12
  	Citation × Citation Citation Abstract Copy Title: Stream bed above Lebanon Year: 1940 South Santiam River stream bed above Lebanon, Oregon Large rubble and bedrock were becoming dominant;1940-08-12 Title: Stream bed above Lebanon Year: 1940 South Santiam River stream bed above Lebanon, Oregon Large rubble and bedrock were becoming dominant;1940-08-12 Close

• 6. [Image] Typical salmon stream

  	This slide represents a typical salmon stream in which a few salmon may be observed ascending the river. A very interesting controversy has arisen over what is known as the "parent stream" theory. In years ...
  	Citation × Citation Citation Abstract Copy Title: Typical salmon stream Year: 1925 This slide represents a typical salmon stream in which a few salmon may be observed ascending the river. A very interesting controversy has arisen over what is known as the "parent stream" theory. In years past it has been debated pro and con in a lively fashion. There are those who have contended that adult salmon ascend the stream in which they were hatched and which their parents ascended. According to this idea, some instinct is supposed to have a directive influence upon the fish as they approach maturity, drawing them into the river which they descended a few years before. For support of this contention it is pointed out that marked fish released as fry in a certain river have been taken in the same stream when adult. There is no denial on the part of those who oppose the "parent stream" theory that salmon are often taken as adults in the same stream in which they were hatched. In fact, this is only to be expected. Our knowledge concerning the salmon during their existence in the ocean is necessarily very limited. It is believed, however, that salmon do not go very far distant from the mouths of rivers which they descended, or that they confine their migrations during the period of growth to near-shore waters up and down the coast. When the period of maturity nears after a few years in the ocean, the salmon being near the mouths of rivers come in contact with the fresh waters of the streams that flow into the ocean with considerable force. The salmon are attracted by this current and make their way into the mouths of the rivers and begin the ascent of the streams. It is only natural that some may find their way into the same rivers which they descended three or four years before. It is believed by the better authorities that the "parent stream" phenomenon is explained as a natural result of the habits of the fish while in the sea. Salmon are taken for commercial purposes in many ways. It is only to be expected that in the case of fish so valuable as the salmon many devices would be employed for their capture. One of the methods of taking the salmon is by the fish wheel, as is illustrated by slides. Title: Typical salmon stream Year: 1925 This slide represents a typical salmon stream in which a few salmon may be observed ascending the river. A very interesting controversy has arisen over what is known as the "parent stream" theory. In years past it has been debated pro and con in a lively fashion. There are those who have contended that adult salmon ascend the stream in which they were hatched and which their parents ascended. According to this idea, some instinct is supposed to have a directive influence upon the fish as they approach maturity, drawing them into the river which they descended a few years before. For support of this contention it is pointed out that marked fish released as fry in a certain river have been taken in the same stream when adult. There is no denial on the part of those who oppose the "parent stream" theory that salmon are often taken as adults in the same stream in which they were hatched. In fact, this is only to be expected. Our knowledge concerning the salmon during their existence in the ocean is necessarily very limited. It is believed, however, that salmon do not go very far distant from the mouths of rivers which they descended, or that they confine their migrations during the period of growth to near-shore waters up and down the coast. When the period of maturity nears after a few years in the ocean, the salmon being near the mouths of rivers come in contact with the fresh waters of the streams that flow into the ocean with considerable force. The salmon are attracted by this current and make their way into the mouths of the rivers and begin the ascent of the streams. It is only natural that some may find their way into the same rivers which they descended three or four years before. It is believed by the better authorities that the "parent stream" phenomenon is explained as a natural result of the habits of the fish while in the sea. Salmon are taken for commercial purposes in many ways. It is only to be expected that in the case of fish so valuable as the salmon many devices would be employed for their capture. One of the methods of taking the salmon is by the fish wheel, as is illustrated by slides. Close

• 7. [Image] Survey of the Columbia River and its tributaries : Part 3

  	The purpose of this Columbia River Stream Survey has been to provide data for evaluation of each stream, or portion of stream, from the standpoint of its present and potential value in relation to the ...
  	Citation × Citation Citation Abstract Copy Title: Survey of the Columbia River and its tributaries : Part 3 Year: 1949 The purpose of this Columbia River Stream Survey has been to provide data for evaluation of each stream, or portion of stream, from the standpoint of its present and potential value in relation to the maintenance of the salmon resources of the Columbia River Two reports have been published to date, this being the third of the series This report deals with the streams in Area II Area II includes all tributaries entering the Columbia River on the south, or Oregon side, in the 204 miles from the mouth up to but not including the Deschutes River Title: Survey of the Columbia River and its tributaries : Part 3 Year: 1949 The purpose of this Columbia River Stream Survey has been to provide data for evaluation of each stream, or portion of stream, from the standpoint of its present and potential value in relation to the maintenance of the salmon resources of the Columbia River Two reports have been published to date, this being the third of the series This report deals with the streams in Area II Area II includes all tributaries entering the Columbia River on the south, or Oregon side, in the 204 miles from the mouth up to but not including the Deschutes River Close

• 8. [Image] Dam on Milton Creek near St Helens, Oregon

  	Citation × Citation Citation Abstract Copy Title: Dam on Milton Creek near St Helens, Oregon Year: 1946 Title: Dam on Milton Creek near St Helens, Oregon Year: 1946 Close

• 9. [Image] Dam on Milton Creek near St Helens, Oregon

  	Citation × Citation Citation Abstract Copy Title: Dam on Milton Creek near St Helens, Oregon Year: 1946 Title: Dam on Milton Creek near St Helens, Oregon Year: 1946 Close

• 10. [Image] Dam on Milton Creek near St Helens, Oregon

  	Citation × Citation Citation Abstract Copy Title: Dam on Milton Creek near St Helens, Oregon Year: 1946 Title: Dam on Milton Creek near St Helens, Oregon Year: 1946 Close