?ros3er Pov?er Dam is located 45 miles up the Yakima River. It is 

 built of concrete^ is 768 feet long, 8 feet high, and spills onto a 

 rock lodge that is crossed by many small shallow channels in v;hich 

 Indians fish for salmon durinf^ low water periods, A centrnl three step 

 fish ladder built in 1930 by the Washington State Department of Fisheries 

 is effective at higher water levels but has a poor approach through shallow 

 ledge rock channels that makes it less effective at low vrator stages. 



A new ladder, very much needed, has been considered and should be 

 located at the head of the deepest channels near the south banko 



Prosser Poi\rer Canal takes off at the north end of Pressor Dam. It 

 has a capacity of 1^ 150 c.f.s. and leads to a pov/erhouse located about a 

 mile below the headgateso The water from the powerhouse is returned 

 directly to the rivor. The Bureau of Reclamation acqu'red this property, 

 including the dam^ from a former power company and rebuilt the head gate 

 structure in 1932, The power generated is used to pump water from the 

 Columbia ditch onto 4,268 acres of Kennewick project, vrith surplus power 

 being sold to a private pov/er company. The ditch is adequately protected 

 by a battery of huge rotary screens, located a few hundred yards below 

 the head of the ditch, operated by the Fish and Wildlife Service. An 

 underground by-pass returns fish to the river. 



Kirkwood Ditch takes off on the south bank 79 miles upstream. It is 

 m the Yakima Indian Reservation and has not been used during the past 

 few years o 



Snipes a nd Allen Ditch takes off on the north bank 83 miles upstream, 

 has a capacity of 35 c.f.s., and was screened in 1938. 



Flint D itch takes off about 500 feet above the Snipes and Allen 

 Ditch on the north bank. It has a small pumping station and is protected 

 by a panel screeno 



Sunnys i de Dam located approximately 88 miles above the mouth of 

 the Yakima River and 5 miles below Union Gap, Y/ashington, was built in 

 1906-1907 by the Bureau of Reclamation. It is a concrete structure 

 500 feet long and 8 feet high, equipped with three fishways, one at 

 each side and one at the center. At the present time only the center 

 fishway is operated,' The Yakima Indian Reservation borders the west 

 bank of the stream in this area, and the Indians fish for salmon and 

 steelhead immediately below the dam. 



Sunnys ide Can al takes off on the east bank at the Sunn;y^ide Dam. 

 It has a capacity of 1.250 c.fcS. and runs for 60 miles down the east 

 side of the Yakima Valleyo For over 20 years this diversion was unpro- 

 tected and it is probable that during this time more fish entered this 

 canal and perished than in any other diversion from the Yakima River. 



In 1929 and 1930 electric fish screens were installed at the head 

 of the ditcho In 1935 a battery of eight rotary screens v;as installed^ 

 In 1939 these were rebuilt and improved with two more units being added, 

 making the present battery of ten rotary screens v;hich successfully 

 prevents the loss of the downstream migrants . 



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