670 U. S. BUREAU OF FISHERIES 



and the electric lighting system was changed from the direct current supplied by 

 the Glacier Park Hotel Co. plant to the alternating current supplied by the com- 

 mercial plant operated from Browning. 



During the season 559,200 black-spotted trout and 225,000 rainbow trout 

 were distributed as fingerlings by the National Park Service, after being reared 

 at the Glacier Park station. These trout were on hand as eggs at the beginning 

 of the fiscal year and were distributed during August and September before the 

 hatchery closed for the winter. Hatchery operations were resumed in March, 

 with the receipt of 582,000 eggs of the rainbow trout and 994,320 of the black- 

 spotted trout. The eggs of the latter species were received from the Montana 

 Fish and Game Department. The fingerlings resulting from this stock will be 

 distributed during the fiscal year 1932, at which time the Glacier Park field will 

 be under the direct supervision of the District Supervisor at Salt Lake City, Utah. 



Miles City (Mont.) stihstation. — Lake Garberson was drawn down in early 

 September and its output of fish distributed. The distributions included 191,180 

 smallmouth blackbass, 44,475 crappie, 76,700 bluegill sunfish, and 4,500 catfish, 

 the total output being considerably in excess of that in 1930. At the close of the 

 harvest the lake was allowed to fill and 5,224 fish were planted to serve as a brood 

 stock during the succeeding year. This lake is operated in conjunction with the 

 State of Montana. Dry weather has lowered its water level since the last harvest 

 and a reduced output in 1932 is anticipated. 



During the past year construction work has created a new lake alongside Lake 

 Garberson. Some difRcvdties were experienced in the operation of this inclosure, 

 known as Lake Keough. Largemough black bass were introduced therein as an 

 experimental brood stock. Two 20-pail shipments of daphnia and fresh-water 

 shrimp and a 20-pail shipment of golden shiners were received from the bureau's 

 Crawford (Nebr.) station. The daphnia and shrimp were divided between the 

 two lakes, while the shiners were allotted to Lake Keough, Lake Garberson already 

 having been stocked with these fish. Additional work on the water supply and 

 excavation of the lake bottoms, to facilitate drainage and harvesting, is con- 

 templated for the near future. 



LEADVILLE (COLO.) STATION AND SUBSTATIONS 

 [C. H. Van Atta, Superintendent] 



Station improvements during the year included the construction of a new 

 drainage ditch 2,300 feet long from the hatchery sewer to Lake Creek. For a 

 length of 3 miles the old wagon road above the hatchery was reconstructed and 

 placed in condition for trucks, after which saw logs were hauled for lumber for 

 use at Leadville and for the new Crystal Lake project. From the logs 25,315 

 board feet of lumber was sawed, planed, and sized at the Leadville mill. The 

 station's production of 3,940,100 brook, black-spotted, Loch Leven, and rainbow 

 trout was distributed by means of the bm-eau's distribution car No. 7, assisted by 

 the station force. During the year the station acquired by transfer 545,100 

 black-spotted trout eggs from the Creede and Yellowstone Park substations, and 

 from the collections made at Pyramid Lake, Nev.; 199,200 Loch Leven trout eggs 

 and 100,000 rainbow trout eggs from the Bozeman (Mont.) station; 54,300 lake 

 trout eggs from the Charlevoix (Mich.) station; and 180,000 rainbow trout eggs 

 from Eagle Nest Lake, in New Mexico. In addition, the usual egg collections in 

 private lakes imder a ])ercentage agreement were made, permitting of a total 

 collection of 5,269,000 brook and Loch Leven trout eggs. Brook trout eggs 

 numbering 600,000 were transferred to other stations. 



The rainbow trout egg collecting field at Eagle Nest Lake, N. Mex., produced 

 1,964,000 eggs of which 400,000 were turned over to the State of New Mexico, 

 and 180,000 were shipped to the Leadville station. The remainder were hatched 

 at Eagle Nest Lake, and the resulting fry were used in stocking Eagle Nest Lake 

 and other waters in New Mexico. 



Crystal Lake, on a privatelj^ owned property 4^4 miles from the Leadville 

 station, is being developed as a rearing pond substation. A 9-acre lake is being 

 cleaned out and a cement outlet provided. 



Creede {Colo.) substation. — The fiscal year 1931 was the second year of operation 

 of the Creede substation. Collections of eggs were made possible by percentage 

 agreements with parties owning reservoirs containing brood stock. Brook, rain- 

 bow, and black-spotted trout eggs numbering 1,835,000 were secured by this 

 means, and 2,487,700 additional eggs were received by transfer. Of the total, 

 1,289,800 were shipped to other stations and allotted to the owners of the reser- 

 voirs from which collections were made. Fry hatched numbered 786,000. Dis- 



