50 PISH AND GAME COMMISSION 



March, the pipe line supplying the hatchery was carried away and 

 the crew, with great difficulty saved the fish in the building by aerating 

 the water with dippers and furnishing a supply from the creek, while 

 the foreman and one assistant worked for hours in the night to install 

 a temporary flume to connect up the water supply that had been cut 

 off by the flood. Luckily, there was not a very great loss of fish, but 

 this is only one of the many instances where the hatchery crews have 

 difficulties to overcome during floods, and the inclemencies of the 

 stormy season, while collecting eggs and operating hatcheries. 



WAWONA HATCHERY 



The usual conditions prevailed at this hatchery during the last two 

 seasons. Owing to algal growths and other conditions the fish have 

 to be planted early. They make a rapid development during the first 

 three months and should all be planted by the first or not later than 

 the tenth of July. If it is deemed necessary to hold the fish in this 

 section to a later date, a hatchery should be established on Alder Creek 

 or a pipe line installed to bring the water from Chilnualno Creek to 

 a flat on the opposite side of the river from Wawona. The Wawona 

 Hatchery was built thirty-two years ago and there has only been one 

 or two seasons during all these years when there was not some trouble 

 among the fish after the first of July. 



YOSEMITE HATCHERY 



This hatchery, located in the Yosemiate National Park, was built 

 during the fall of 1926 and finished in time for the spring eggs in 

 1927. During the seasons 1927 and 1928 the following number of 

 fish have been raised in this hatchery : 



Rainbow 195,000 Steelhead 966 000 



Eastern brook 91,000 Black spotted 245,000 



Loch Leven 298,000 



The station consists of a hatchery building containing 52 troughs, 

 foreman's cottage and a cottage for the help. An aquarium to display 

 the different species of trout is now being constructed in connection 

 with the hatchery and plans are made for exhibition ponds in which 

 will be placed trout of different species and ages. There is a constant 

 influx of visitors at the hatchery, and there is no more popular place 

 in the park for the visiting tourists than Yosemite Hatchery. 



MORMON CREEK HATCHERY 



In the fall of 1927 a site for a temporary hatchery was selected on 

 Mormon Creek 44 miles from Sonora, Tuolumne County. The water 

 used in the hatchery experiments has its source in a tunnel that was 

 run in the mountain below Columbia to tap an ancient gravel channel. 

 Tests proved this water to be free from minerals injurious to fish and 

 as it came from a tunnel over one mile in length several hundred 

 feet from the surface, it was of a uniform temperature that would 

 produce an excellent development in the fish. 



A lease was procured for a site and we were assured that the water 

 supply would be constant. Thirty troughs were installed and during 

 the early winter, eastern brook and Loch Leven eggs were shipped 

 to the hatchery and installed under a tent. The eggs hatched in good 

 condition and they made a rapid and healthy growth. During the 



