File:Canadian machinery and metalworking (January-June 1913) (1913) (14781733031).jpg

Identifier: canmachinerjanjun1913toro (find matches)
Title: Canadian machinery and metalworking (January-June 1913)
Year: 1913 (1910s)
Authors:
Subjects: Machinery Machinery Machinery
Publisher: Toronto MacLean-Hunter
Contributing Library: Fisher - University of Toronto
Digitizing Sponsor: Algoma University, Trent University, Lakehead University, Laurentian University, Nipissing University, Ryerson University and University of Toronto Libraries

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ershedof some 52,000 square miles, situated inNorthern Minnesota, North-West On-tario and Eastern Manitoba. The aver-age rainfall in the area is from 18 in.to 25 in., and the river flow at the Pointdu Bois Falls was 16,000 cub. ft. persecond as a minimum and 55,000 cub. ft.per second as a maximum during theyears 1907 to 1910. Old flood-markssuggest that flows of 90,000 to 100,000cub. ft. have been reached. On thewhole, however, the flow is very uniform in the formation of a reservoir of 6,000acres in extent, which gives such amplestorage that there is no fear that thestation will not be able to meet all de-mands for power during any season. Itis estimated that the water supply willallow of the generation of an average of65,000 horse-power for twenty-four hoursat all times. Power Station Site. The site of the power-station, and thegeneral plan of the works carried out atPoint du Bois, are shown in Fig. 1. Itwill be seen that the river falls over two Area, of Ttjeservoir 7 Square Miles.
Text Appearing After Image:
runt mustj*ys n> mtmm FIG. 1. PLAN OF WORKS AND POINT DU BOIS FALLS. Point du Bois Falls, on the WinnipegRiver, some 70 miles from Winnipeg, sothat the electrical scheme includes notonly the power-station, but a 77-miletransmission line and a terminal stationin the city, in addition to various sub-stations and the distribution network.The power-station machines generatecurrent at 6,600 volts, which is steppedup to 72,000 volts for the transmissionlines. At the terminal station, this pres-sure is stepped down to 12,000 volts fordistribution to the sub-stations, at whichit is further reduced to 2,200 volts and550 volts. The 12,000-volt distributionto the sub-stations is carried out by un-derground cables, while the lower pres-sure distributing network is both over-head and underground. as compared with other Canadian rivers,this state of affairs being largely ac-counted for by the large amount of vir-gin forest land and the great number oflakes in the watershed. The total lakearea is

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