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• 1. [Image] Marmot Dam on the Sandy River

  	Citation × Citation Citation Abstract Copy Title: Marmot Dam on the Sandy River Year: 1940 Title: Marmot Dam on the Sandy River Year: 1940 Close

• 2. [Image] Entrance of fish ladder on Marmot Dam

  	Citation × Citation Citation Abstract Copy Title: Entrance of fish ladder on Marmot Dam Year: 1939 Title: Entrance of fish ladder on Marmot Dam Year: 1939 Close

• 3. [Image] Marmot Dam on the Sandy River

  	Citation × Citation Citation Abstract Copy Title: Marmot Dam on the Sandy River Year: 1940 Title: Marmot Dam on the Sandy River Year: 1940 Close

• 4. [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

• 5. [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

• 6. [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

• 7. [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

• 8. [Image] 9 mile dam on the Walla Walla River

  	Dam has been blasted out.
  	Citation × Citation Citation Abstract Copy Title: 9 mile dam on the Walla Walla River Year: 1937 Dam has been blasted out. Title: 9 mile dam on the Walla Walla River Year: 1937 Dam has been blasted out. Close

• 9. [Image] Bonneville Dam

  	Citation × Citation Citation Abstract Copy Title: Bonneville Dam Year: 1937 Title: Bonneville Dam Year: 1937 Close

• 10. [Image] Headgates to Cove power canal

  	Citation × Citation Citation Abstract Copy Title: Headgates to Cove power canal Year: 1942 Title: Headgates to Cove power canal Year: 1942 Close

• 11. [Image] Big Sandy channel diversion dam

  	Citation × Citation Citation Abstract Copy Title: Big Sandy channel diversion dam Year: 1940 Title: Big Sandy channel diversion dam Year: 1940 Close

• 12. [Image] Big Sandy channel dam

  	Citation × Citation Citation Abstract Copy Title: Big Sandy channel dam Year: 1940 Title: Big Sandy channel dam Year: 1940 Close

• 13. [Image] Big Sandy channel dam

  	Citation × Citation Citation Abstract Copy Title: Big Sandy channel dam Year: 1940 Title: Big Sandy channel dam Year: 1940 Close

• 14. [Image] 9 mile dam on the Walla Walla River

  	Dam has been blasted out.
  	Citation × Citation Citation Abstract Copy Title: 9 mile dam on the Walla Walla River Year: 1937 Dam has been blasted out. Title: 9 mile dam on the Walla Walla River Year: 1937 Dam has been blasted out. Close

• 15. [Image] Unity Dam on Burnt River

  	Citation × Citation Citation Abstract Copy Title: Unity Dam on Burnt River Year: 1941 Title: Unity Dam on Burnt River Year: 1941 Close

• 16. [Image] Unity Dam on Burnt River, Oregon

  	Citation × Citation Citation Abstract Copy Title: Unity Dam on Burnt River, Oregon Year: 1941 Title: Unity Dam on Burnt River, Oregon Year: 1941 Close

• 17. [Image] Little Sandy dam

  	Citation × Citation Citation Abstract Copy Title: Little Sandy dam Year: 1940 Title: Little Sandy dam Year: 1940 Close

• 18. [Image] Little Sandy dam

  	Citation × Citation Citation Abstract Copy Title: Little Sandy dam Year: 1940 Title: Little Sandy dam Year: 1940 Close

• 19. [Image] Sandy River diversion dam before repair

  	Citation × Citation Citation Abstract Copy Title: Sandy River diversion dam before repair Year: 1940 Title: Sandy River diversion dam before repair Year: 1940 Close

• 20. [Image] Jack Creek dam

  	Jack Creek is a tributary of Metolius River. Upper dam is found at S31, T12S, R9E
  	Citation × Citation Citation Abstract Copy Title: Jack Creek dam Year: 1942 Jack Creek is a tributary of Metolius River. Upper dam is found at S31, T12S, R9E Title: Jack Creek dam Year: 1942 Jack Creek is a tributary of Metolius River. Upper dam is found at S31, T12S, R9E Close

• 21. [Image] Jack Creek dam

  	Jack Creek is a tributary of Metolius River. Upper dam is found at S31, T12S, R9E
  	Citation × Citation Citation Abstract Copy Title: Jack Creek dam Year: 1942 Jack Creek is a tributary of Metolius River. Upper dam is found at S31, T12S, R9E Title: Jack Creek dam Year: 1942 Jack Creek is a tributary of Metolius River. Upper dam is found at S31, T12S, R9E Close

• 22. [Image] Irrigation dam and diversion on North Fork Burnt River

  	At this season takes all available water remaining in stream (except for seepage)
  	Citation × Citation Citation Abstract Copy Title: Irrigation dam and diversion on North Fork Burnt River Year: 1941 At this season takes all available water remaining in stream (except for seepage) Title: Irrigation dam and diversion on North Fork Burnt River Year: 1941 At this season takes all available water remaining in stream (except for seepage) Close

• 23. [Image] Irrigation dam and diversion on North Fork Burnt River

  	At this season takes all available water remaining in stream (except for seepage)
  	Citation × Citation Citation Abstract Copy Title: Irrigation dam and diversion on North Fork Burnt River Year: 1941 At this season takes all available water remaining in stream (except for seepage) Title: Irrigation dam and diversion on North Fork Burnt River Year: 1941 At this season takes all available water remaining in stream (except for seepage) Close

• 24. [Image] North Fork Burnt River

  	Rock diversion dam is completely across stream diveting entire flow, except for seepage into irrigation ditch. It is a barrier at low water. Diversion dam is located at entrance to Whitman National For...
  	Citation × Citation Citation Abstract Copy Title: North Fork Burnt River Year: 1941 Rock diversion dam is completely across stream diveting entire flow, except for seepage into irrigation ditch. It is a barrier at low water. Diversion dam is located at entrance to Whitman National Forest Title: North Fork Burnt River Year: 1941 Rock diversion dam is completely across stream diveting entire flow, except for seepage into irrigation ditch. It is a barrier at low water. Diversion dam is located at entrance to Whitman National Forest Close

• 25. [Image] Diversion dam near Prineville, Oregon

  	Crooked River diversion dam
  	Citation × Citation Citation Abstract Copy Title: Diversion dam near Prineville, Oregon Year: 1942 Crooked River diversion dam Title: Diversion dam near Prineville, Oregon Year: 1942 Crooked River diversion dam Close

• 26. [Image] Lamprey eels at the Bonneville Dam

  	Lampreys are using a temporary fish ladder while the dam is under construction
  	Citation × Citation Citation Abstract Copy Title: Lamprey eels at the Bonneville Dam Year: 1937 Lampreys are using a temporary fish ladder while the dam is under construction Title: Lamprey eels at the Bonneville Dam Year: 1937 Lampreys are using a temporary fish ladder while the dam is under construction Close

• 27. [Image] Roll way at the Bonneville Dam

  	Citation × Citation Citation Abstract Copy Title: Roll way at the Bonneville Dam Year: 1937 Title: Roll way at the Bonneville Dam Year: 1937 Close

• 28. [Image] Rotating screens and spillway

  	Rotating screens and spillway in dam at outlet of Suttle Lake on Lake Creek, a tributary of the Metolius River
  	Citation × Citation Citation Abstract Copy Title: Rotating screens and spillway Year: 1942 Rotating screens and spillway in dam at outlet of Suttle Lake on Lake Creek, a tributary of the Metolius River Title: Rotating screens and spillway Year: 1942 Rotating screens and spillway in dam at outlet of Suttle Lake on Lake Creek, a tributary of the Metolius River Close

• 29. [Image] Temporary fish ladder

  	Temporary ladder on the Oregon side of the Bonneville Dam
  	Citation × Citation Citation Abstract Copy Title: Temporary fish ladder Year: 1937 Temporary ladder on the Oregon side of the Bonneville Dam Title: Temporary fish ladder Year: 1937 Temporary ladder on the Oregon side of the Bonneville Dam Close

• 30. [Image] Temporary fish ladder

  	Entrance to temporary fish ladder at the Bonneville Dam
  	Citation × Citation Citation Abstract Copy Title: Temporary fish ladder Year: 1937 Entrance to temporary fish ladder at the Bonneville Dam Title: Temporary fish ladder Year: 1937 Entrance to temporary fish ladder at the Bonneville Dam Close

• 31. [Image] Temporary fish ladder

  	Entrance to temporary fish ladder at the Bonneville Dam
  	Citation × Citation Citation Abstract Copy Title: Temporary fish ladder Year: 1937 Entrance to temporary fish ladder at the Bonneville Dam Title: Temporary fish ladder Year: 1937 Entrance to temporary fish ladder at the Bonneville Dam Close

• 32. [Image] Temporary fish ladder

  	Temporary ladder on the Oregon side of the Bonneville Dam
  	Citation × Citation Citation Abstract Copy Title: Temporary fish ladder Year: 1937 Temporary ladder on the Oregon side of the Bonneville Dam Title: Temporary fish ladder Year: 1937 Temporary ladder on the Oregon side of the Bonneville Dam Close

• 33. [Image] Releasing marked fish

  	Releasing marked fish above Bonneville Dam with the anal and right vental removed
  	Citation × Citation Citation Abstract Copy Title: Releasing marked fish Year: 1940 Releasing marked fish above Bonneville Dam with the anal and right vental removed Title: Releasing marked fish Year: 1940 Releasing marked fish above Bonneville Dam with the anal and right vental removed Close

• 34. [Image] Releasing marked fish

  	Releasing marked fish above Bonneville Dam with the anal and right vental removed
  	Citation × Citation Citation Abstract Copy Title: Releasing marked fish Year: 1940 Releasing marked fish above Bonneville Dam with the anal and right vental removed Title: Releasing marked fish Year: 1940 Releasing marked fish above Bonneville Dam with the anal and right vental removed Close

• 35. [Image] Warrenton water supply dam

  	City of Warrenton water supply dam on the Lewis and Clark River. The main dam which was far below this washed out and was to be rebuilt in 1946
  	Citation × Citation Citation Abstract Copy Title: Warrenton water supply dam Year: 1946 City of Warrenton water supply dam on the Lewis and Clark River. The main dam which was far below this washed out and was to be rebuilt in 1946 Title: Warrenton water supply dam Year: 1946 City of Warrenton water supply dam on the Lewis and Clark River. The main dam which was far below this washed out and was to be rebuilt in 1946 Close

• 36. [Image] Warrenton water supply

  	City of Warrenton water supply dam on the Lewis and Clark River. ;The main dam washed out and was to be rebuilt in 1946. The dam will have a fish ladder
  	Citation × Citation Citation Abstract Copy Title: Warrenton water supply Year: 1946 City of Warrenton water supply dam on the Lewis and Clark River. ;The main dam washed out and was to be rebuilt in 1946. The dam will have a fish ladder Title: Warrenton water supply Year: 1946 City of Warrenton water supply dam on the Lewis and Clark River. ;The main dam washed out and was to be rebuilt in 1946. The dam will have a fish ladder Close

• 37. [Image] Lumber mill dam at Carlton, Oregon

  	Lumber mill dam on North Fork Yamhill River. Dam is an obstruction to migratory fish
  	Citation × Citation Citation Abstract Copy Title: Lumber mill dam at Carlton, Oregon Year: 1937 Lumber mill dam on North Fork Yamhill River. Dam is an obstruction to migratory fish Title: Lumber mill dam at Carlton, Oregon Year: 1937 Lumber mill dam on North Fork Yamhill River. Dam is an obstruction to migratory fish Close

• 38. [Image] Dam at Oregon state hatchery

  	Dam at Oregon state hatchery on the North Fork Klaskanine River
  	Citation × Citation Citation Abstract Copy Title: Dam at Oregon state hatchery Year: 1946 Dam at Oregon state hatchery on the North Fork Klaskanine River Title: Dam at Oregon state hatchery Year: 1946 Dam at Oregon state hatchery on the North Fork Klaskanine River Close

• 39. [Image] Grande Ronde River power diversion dam

  	Grande Ronde River showing power diversion at point between La Grande and Island City. Supplies water power to flour mill in Island City. No protective devices and no by-pass
  	Citation × Citation Citation Abstract Copy Title: Grande Ronde River power diversion dam Year: 1941 Grande Ronde River showing power diversion at point between La Grande and Island City. Supplies water power to flour mill in Island City. No protective devices and no by-pass Title: Grande Ronde River power diversion dam Year: 1941 Grande Ronde River showing power diversion at point between La Grande and Island City. Supplies water power to flour mill in Island City. No protective devices and no by-pass Close

• 40. [Image] Power diversion dam across Grande Ronde River

  	Grande Ronde River with power diversion dam completely across the river. It is a barrier for fish at low water when only seepage escapes downstream. Dam is located between La Grande and Island City, Oregon ...
  	Citation × Citation Citation Abstract Copy Title: Power diversion dam across Grande Ronde River Year: 1941 Grande Ronde River with power diversion dam completely across the river. It is a barrier for fish at low water when only seepage escapes downstream. Dam is located between La Grande and Island City, Oregon . River supplies water power for flour mill in Island City From enclosure: Diversion Dam for Island City flour mill Title: Power diversion dam across Grande Ronde River Year: 1941 Grande Ronde River with power diversion dam completely across the river. It is a barrier for fish at low water when only seepage escapes downstream. Dam is located between La Grande and Island City, Oregon . River supplies water power for flour mill in Island City From enclosure: Diversion Dam for Island City flour mill Close

• 41. [Image] North Fork Burnt River irrigation diversion

  	Photo shows irrigation diversion, almost completely diverting flow
  	Citation × Citation Citation Abstract Copy Title: North Fork Burnt River irrigation diversion Year: 1941 Photo shows irrigation diversion, almost completely diverting flow Title: North Fork Burnt River irrigation diversion Year: 1941 Photo shows irrigation diversion, almost completely diverting flow Close

• 42. [Image] Diversion dam for Cove power canal

  	Diversion dam on Crooked River for Cove power canal
  	Citation × Citation Citation Abstract Copy Title: Diversion dam for Cove power canal Year: 1942 Diversion dam on Crooked River for Cove power canal Title: Diversion dam for Cove power canal Year: 1942 Diversion dam on Crooked River for Cove power canal Close

• 43. [Image] North Canal Dam

  	North Canal dam at northern city limits of Bend, Oregon on the Deschutes River
  	Citation × Citation Citation Abstract Copy Title: North Canal Dam Year: 1942 North Canal dam at northern city limits of Bend, Oregon on the Deschutes River Title: North Canal Dam Year: 1942 North Canal dam at northern city limits of Bend, Oregon on the Deschutes River Close

• 44. [Image] Deschutes River irrigation dam

  	Deschutes River irrigation dam 1/4 mile below the Pacific, Power and Lights dam in Bend, Oregon
  	Citation × Citation Citation Abstract Copy Title: Deschutes River irrigation dam Year: 1942 Deschutes River irrigation dam 1/4 mile below the Pacific, Power and Lights dam in Bend, Oregon Title: Deschutes River irrigation dam Year: 1942 Deschutes River irrigation dam 1/4 mile below the Pacific, Power and Lights dam in Bend, Oregon Close

• 45. [Image] Diversion Dam below Troutdale, Oregon

  	Citation × Citation Citation Abstract Copy Title: Diversion Dam below Troutdale, Oregon Year: 1939 Title: Diversion Dam below Troutdale, Oregon Year: 1939 Close

• 46. [Image] Sandy River

  	Big Sandy Channel dam in far background
  	Citation × Citation Citation Abstract Copy Title: Sandy River Year: 1940 Big Sandy Channel dam in far background Title: Sandy River Year: 1940 Big Sandy Channel dam in far background Close

• 47. [Image] Bull Run diversion

  	Portland water department Bull Run diversion
  	Citation × Citation Citation Abstract Copy Title: Bull Run diversion Year: 1940 Portland water department Bull Run diversion Title: Bull Run diversion Year: 1940 Portland water department Bull Run diversion Close

• 48. [Image] Bull Run River

  	Bull Run River below Portland Water Department dam
  	Citation × Citation Citation Abstract Copy Title: Bull Run River Year: 1940 Bull Run River below Portland Water Department dam Title: Bull Run River Year: 1940 Bull Run River below Portland Water Department dam Close

• 49. [Image] Bull Run diversion

  	Portland water department Bull Run diversion
  	Citation × Citation Citation Abstract Copy Title: Bull Run diversion Year: 1940 Portland water department Bull Run diversion Title: Bull Run diversion Year: 1940 Portland water department Bull Run diversion Close

• 50. [Image] Bonneville Dam

  	Citation × Citation Citation Abstract Copy Title: Bonneville Dam Year: 1937 Title: Bonneville Dam Year: 1937 Close

• 51. [Image] Pacific, Power and Lights dam in Bend, Oregon

  	Citation × Citation Citation Abstract Copy Title: Pacific, Power and Lights dam in Bend, Oregon Year: 1942 Title: Pacific, Power and Lights dam in Bend, Oregon Year: 1942 Close

• 52. [Image] Bonneville Dam

  	Bonneville Dam
  	Citation × Citation Citation Abstract Copy Title: Bonneville Dam Year: 1937 Bonneville Dam Title: Bonneville Dam Year: 1937 Bonneville Dam Close

• 53. [Image] Bonneville Dam on the Columbia River

  	Dam under construction
  	Citation × Citation Citation Abstract Copy Title: Bonneville Dam on the Columbia River Year: 1937 Dam under construction Title: Bonneville Dam on the Columbia River Year: 1937 Dam under construction Close

• 54. [Image] Temporary fish ladder

  	Temporary fish ladder at the Bonneville Dam on the Washington side. Dam was under construction
  	Citation × Citation Citation Abstract Copy Title: Temporary fish ladder Year: 1937 Temporary fish ladder at the Bonneville Dam on the Washington side. Dam was under construction Title: Temporary fish ladder Year: 1937 Temporary fish ladder at the Bonneville Dam on the Washington side. Dam was under construction Close

• 55. [Image] Temporary fish ladder

  	Temporary fish ladder on the Oregon side of the Bonneville Dam. There is a salmon in air at left side of jump
  	Citation × Citation Citation Abstract Copy Title: Temporary fish ladder Year: 1937 Temporary fish ladder on the Oregon side of the Bonneville Dam. There is a salmon in air at left side of jump Title: Temporary fish ladder Year: 1937 Temporary fish ladder on the Oregon side of the Bonneville Dam. There is a salmon in air at left side of jump Close

• 56. [Image] Fishway and diversion dam

  	Fishway and diversion dam for the City of Union, Oregon, domestic water supply found on Catherine Creek
  	Citation × Citation Citation Abstract Copy Title: Fishway and diversion dam Year: 1937 Fishway and diversion dam for the City of Union, Oregon, domestic water supply found on Catherine Creek Title: Fishway and diversion dam Year: 1937 Fishway and diversion dam for the City of Union, Oregon, domestic water supply found on Catherine Creek Close

• 57. [Image] Temporary fish ladder

  	Temporary fish ladder at the Bonneville Dam
  	Citation × Citation Citation Abstract Copy Title: Temporary fish ladder Year: 1937 Temporary fish ladder at the Bonneville Dam Title: Temporary fish ladder Year: 1937 Temporary fish ladder at the Bonneville Dam Close