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• 421. [Image] Small storage dam

  	Small storage dam on the Tualatin River, located 3 miles above the mouth It is 3 feet high but the downstream apron makes passage difficult; 1937-06-24
  	Citation × Citation Citation Abstract Copy Title: Small storage dam Year: 1937 Small storage dam on the Tualatin River, located 3 miles above the mouth It is 3 feet high but the downstream apron makes passage difficult; 1937-06-24 Title: Small storage dam Year: 1937 Small storage dam on the Tualatin River, located 3 miles above the mouth It is 3 feet high but the downstream apron makes passage difficult; 1937-06-24 Close

• 422. [Image] Fish ladder near Carlton, Oregon

  	Citation × Citation Citation Abstract Copy Title: Fish ladder near Carlton, Oregon Year: 1940 Title: Fish ladder near Carlton, Oregon Year: 1940 Close

• 423. [Image] Dam on Milk Creek

  	Citation × Citation Citation Abstract Copy Title: Dam on Milk Creek Year: 1940 Title: Dam on Milk Creek Year: 1940 Close

• 424. [Image] Mill dam in Long Tom River

  	Mill dam in Long Tom River above Noti, Oregon Impassable at present water;1938
  	Citation × Citation Citation Abstract Copy Title: Mill dam in Long Tom River Year: 1938 Mill dam in Long Tom River above Noti, Oregon Impassable at present water;1938 Title: Mill dam in Long Tom River Year: 1938 Mill dam in Long Tom River above Noti, Oregon Impassable at present water;1938 Close

• 425. [Image] Union water supply reservoir

  	Lower dam in Union, Oregon, water supply reservoir. At low water it is a barrier to fish
  	Citation × Citation Citation Abstract Copy Title: Union water supply reservoir Year: 1941 Lower dam in Union, Oregon, water supply reservoir. At low water it is a barrier to fish Title: Union water supply reservoir Year: 1941 Lower dam in Union, Oregon, water supply reservoir. At low water it is a barrier to fish Close

• 426. [Image] East fish trap at Rock Island Dam

  	East fish trap and upper part of fish ladder at the Rock Island Dam
  	Citation × Citation Citation Abstract Copy Title: East fish trap at Rock Island Dam Year: 1939 East fish trap and upper part of fish ladder at the Rock Island Dam Title: East fish trap at Rock Island Dam Year: 1939 East fish trap and upper part of fish ladder at the Rock Island Dam Close

• 427. [Image] Headgate in Rosa irrigation diversion

  	Downstream view of the rotary gate at the head of the Rosa irrigation ditch at the Rosa Dam
  	Citation × Citation Citation Abstract Copy Title: Headgate in Rosa irrigation diversion Year: 1941 Downstream view of the rotary gate at the head of the Rosa irrigation ditch at the Rosa Dam Title: Headgate in Rosa irrigation diversion Year: 1941 Downstream view of the rotary gate at the head of the Rosa irrigation ditch at the Rosa Dam Close

• 428. [Image] Rosa Dam

  	Rotary gates and spillway at Rosa Dam
  	Citation × Citation Citation Abstract Copy Title: Rosa Dam Year: 1941 Rotary gates and spillway at Rosa Dam Title: Rosa Dam Year: 1941 Rotary gates and spillway at Rosa Dam Close

• 429. [Image] Rock Island Dam

  	Rock Island Dam on the Columbia River
  	Citation × Citation Citation Abstract Copy Title: Rock Island Dam Year: 1934 Rock Island Dam on the Columbia River Title: Rock Island Dam Year: 1934 Rock Island Dam on the Columbia River Close

• 430. [Image] Chinooks jumping over middle rocks

  	Rock Island Dam
  	Citation × Citation Citation Abstract Copy Title: Chinooks jumping over middle rocks Year: 1939 Rock Island Dam Title: Chinooks jumping over middle rocks Year: 1939 Rock Island Dam Close