82 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



The hatchery, which was completed on July 25, is a frame building 

 66 feet long by 33 feet wide, with a 17 by 17 foot transept for main 

 entrance. The first floor contains the hatching room (48 feet long by 

 32 feet wide), the boiler-room, reception-hall and office, and on the 

 second floor are two bedrooms. The whole building is fitted with hot- 

 water heating apparatus. The water supply is obtained from a series 

 of springs rising in Amos Canyon within the hatchery grounds, and is 

 conveyed by closed plank flumes, 700 feet long, to the hatchery. 



During the summer various streams in the Black Hills, in South 

 Dakota and eastern Wyoming, were investigated by the superin- 

 tendent with the view to the establishment of auxiliary stations for 

 the collection of brook and Loch Leven trout eggs, but judging from 

 information so far gained it is believed the collections for a time will 

 be somewhat limited, though there are many streams^ in this region 

 which will eventually become productive if stocked with suitable fish. 

 A permit was obtained from the governor of South Dakota for seining 

 fish from Spearfish Creek, and within an area of 8 miles 900 brook 

 trout and 140 Loch Levens were secured and transferred to the station 

 ponds. Arrangements were also made with individuals to collect eggs 

 on shares from private ponds. A temporary retaining-pond was con- 

 structed on Sand Creek, about 7 miles from Beulah, Wyo., in the 

 Black Hills, and 3,000 adult trout, averaging 10 inches in length, 

 were collected. These commenced to spawn on November 15, and by 

 January 20 the 1,100 females had yielded 374,000 eggs. 



From all sources in South Dakota and Wyoming 581,000 brook 

 trout and 41,500 Loch Leven trout eggs were obtained, and 100,000 

 brook-trout eggs were shipped from Leadville. Of those obtained at 

 Sand Creek 50,000 were sent to the Wyoming Fish Commission and 

 to an applicant in Idaho; the balance were hatched with compara- 

 tively light losses and yielded 300,000 fry, or 93 per cent of the eggs 

 reserved. As a result of the season's work, 579,568 brook-trout fry 

 were hatched, 85,145 were lost during the sac stage, 87,423 were 

 given to the owners of stock fish from private ponds, and 123,000 dis- 

 tributed, leaving on hand at the close of the year 284,000. A consign- 

 ment of 100,000 black-spotted trout eggs, shipped from the Leadville 

 station in July, hatched the following month with a loss of 18,240. 

 The fry were held in troughs at the station during the winter, but the 

 losses were very heavy, and when distributed in the spring only 20,260 

 of them remained; 15,000 of these were planted in May and June. 



The superintendent made a trip through northern Wyoming in April 

 with the view to establishing an auxiliary station for the collection of 

 black-spotted trout eggs, and after several days of investigation along 

 the Big Horn Mountains, Tongue River was decided upon as the most 

 feasible field for operations. An egg-eying station was accordingly 

 erected near Dayton, Wyo., early in May, and by the close of the 

 year several hundred adults had been collected and a few thousand 

 eggs secured, but the outlook was very unfavorable on account of the 



