CALIFORNIA FISH AND GAME. 87 



the old Hat Creek Hatchery was hicated. It is thirty-eight miles in 

 length. Its principal tributaries are Rising River, a short stream aris- 

 ing from large springs in the lava, and Lost Creek. Rising River is 

 only two miles in length, but has an average flow of 380 second-feet of 

 water. Hat Creek, before its confluence with Rising River at the town 

 of Cassell, has an average flow of about 100 second-feet during the 

 summer months. Hat Creek and its tributary, Rising River, were 

 noted for the excellence of their rainbow trout. After the flood of mud 

 and Sand from Mount Lassen, the only survivors in the valley were 

 those that were in Rising River. The water was muddy all during the 

 season of 1915, and during the following years continued so muddy 

 that it was not considered practical to restock the stream. It will 

 probably be several years before flsh will again thrive in Hat Creek, as 

 the shifting sand deposited by the volcano destroys all the insect life 

 in the stream, as well as making it uninhabitable for trout. 



The fish enter Burney Creek late in the summer, but the run is a 

 jn-otracted one, lasting from April to August. The fish are late in 

 developing, and if the fry were reared in a higher altitude and the 

 progeny spawned later each season, a fall-spawning rainbow trout could 

 probably be developed. This might have some advantages over a 

 spring-spawning fish, as such trout would be in fine condition for the 

 anglers when the fishing season opens in the spring. 



MARLETT-CARSON HATCHERY. 



The supply of eastern brook trout fry was increased considerably in 

 1916 and 1917. The Nevada State Fish Commisison did not operate 

 its hatcheries, and the California commission was able to secure the 

 privilege of collecting eggs from JMarlett Lake, Nevada. The Carson 

 City Hatchery was taken over by the commission, and the eastern brook 

 trout eggs collected from Marlett Lake were shipped to this hatchery, 

 where they were eyed and prepared for shipment. At this station 

 690,000 eggs were collected. The second year but half the eggs taken 

 were to go to California under the agreement entered into. The share 

 shipped to the Mount Shasta Hatchery amounted to 200,000 eggs. 



DOMINGO SPRINGS HATCHERY. 



An experimental hatchery was established at Domingo Springs in 

 1916. Improvements were made during 1917, when the temporary 

 plant was moved to Rice Creek, one of the main branches of the North 

 Fork of the Feather River above Lake Almanor. A thorough test of 

 the water and an investigation of the run of fish resulted in the estab- 

 lishment of a permanent egg-collecting station and hatchery at this 

 place. Accordingly, during the suimner and fall of 1919, a permanent 

 building was erected and a substantial trap constructed, one-quarter 

 of a mile below the falls, in Rice Creek. The site was procured from 

 the United States Forest Service. This desirable station will furnish 

 fry for the entire region surrounding the west side of Lake Almanor, 

 as well as the lakes and streams in tlie ]\Iount Lassen National Park and 

 surrounding country. 



